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Full vulnerability report · 2021
CVE-2021-43527High confidence

NSS (Network Security Services) versions prior to 3.73 or 3.68.1 ESR are vulnerable to a heap overflow when handling DER-encoded DSA or RSA-PSS signatures

Mozilla · NSS

9.8CriticalCVSS 3.1
Recommended action
Patch only the product branches with a verified fix

Critical technical impact with a remotely reachable, unauthenticated path; no CISA KEV confirmation is currently recorded. Verified remediation exists for at least one product or source, but 11 structured product or package states remain unresolved. Apply remediation only to the exact product branch confirmed by its source.

Fix availability varies by product
R
Operational reassessment

Published severity in operational context

Open reassessment dashboard →
Published severityCriticalOperational priority:Critical, unchanged from published severity.unchanged

Evidence used

  • No CISA KEV confirmation is currently recorded.
  • The selected CVSS metric records a network-reachable, unauthenticated path with no user interaction.
  • EPSS is 17.56% for the current model date.

Compensating controls

  • Validate the affected product branch and deploy the verified fixed release.
  • Restrict the affected network interface to trusted sources where business-safe.
  • Monitor vendor guidance and exploitation sources for a material change.

Verification

  1. Confirm that the asset runs Mozilla NSS and falls inside the recorded affected range.
  2. Verify the installed build against the product-specific fixed version after deployment.
  3. Validate exposure, authentication requirements and compensating controls in the actual environment.
  4. Reopen this reassessment when CVSS, KEV, EPSS, exploit evidence or remediation changes.
Mitigation target: Within 3 daysRemediation target: Within 90 days

This automated reassessment organises public evidence. It does not know asset exposure, business impact or control effectiveness and does not replace CVSS or a human risk decision.

Cross-source reconciliation

Remediation availability differs by product scope

Verified remediation exists for at least one product or source, but 11 structured product or package states remain unresolved. Apply remediation only to the exact product branch confirmed by its source.

Distribution package intelligence

Release-specific package status

Alpine, Debian findings are scoped to the named distribution, release and source package. An absent finding does not mean a package is unaffected.

7 package states
Repository candidate not checked

A published vendor fix does not prove that a matching update is enabled and installable on a particular asset. Confirm the local package candidate before scheduling remediation.

Distribution releaseSource packageVendor stateFixed versionEvidence
Alpine v3.23v3.23 · mainnssVendor fix publishedAlpine records a security fix at this version. An absent entry does not mean the package is unaffected.3.73-r0Alpine Security Database ↗Source updated 3 Oct 2026
Alpine v3.22v3.22 · mainnssVendor fix publishedAlpine records a security fix at this version. An absent entry does not mean the package is unaffected.3.73-r0Alpine Security Database ↗Source updated 3 Oct 2026
Alpine v3.21v3.21 · mainnssVendor fix publishedAlpine records a security fix at this version. An absent entry does not mean the package is unaffected.3.73-r0Alpine Security Database ↗Source updated 3 Oct 2026
Debian trixietrixie · sourcenssVendor fix publishedDebian records a fixed source-package version for this release.2:3.73-1Debian Security Tracker ↗Source updated 5 Oct 2026
Debian bookwormbookworm · sourcenssVendor fix publishedDebian records a fixed source-package version for this release.2:3.73-1Debian Security Tracker ↗Source updated 5 Oct 2026
Debian forkyforky · sourcenssVendor fix publishedDebian records a fixed source-package version for this release.2:3.73-1Debian Security Tracker ↗Source updated 5 Oct 2026
Debian sidsid · sourcenssVendor fix publishedDebian records a fixed source-package version for this release.2:3.73-1Debian Security Tracker ↗Source updated 5 Oct 2026
Direct vendor intelligence

Authoritative vendor CSAF and VEX advisories

Structured product status and remediation from the issuing vendor. Product-state explanations are always visible; large lists can be searched or downloaded.

3 current
CVE-2021-43527 · CSAF 2.0 · revision 82 · interimSUSE Product Security TeamCVE-2021-43527
16 known affected

The vendor explicitly identifies these products as affected by this CVE.

  • mozilla-nss as component of SUSE Linux Enterprise Server for SAP Applications 12 SP5
  • SLES 15 SP1 CHOST Images for Amazon EC2
  • SLES 15 SP2 CHOST Images for Amazon EC2
  • SLES 15 SP3 CHOST Images for Amazon EC2
  • SLES 15 SP4 CHOST Images for Amazon EC2
  • SLES 15 SP5 CHOST Images for Amazon EC2
  • SLES 15 SP1 CHOST Images for Google
  • SLES 15 SP2 CHOST Images for Google
  • SLES 15 SP3 CHOST Images for Google
  • SLES 15 SP4 CHOST Images for Google
  • SLES 15 SP5 CHOST Images for Google
  • SLES 15 SP1 CHOST Images for Microsoft Azure
Summary
NSS (Network Security Services) versions prior to 3.73 or 3.68.1 ESR are vulnerable to a heap overflow when handling DER-encoded DSA or RSA-PSS signatures. Applications using NSS for handling signatures encoded within CMS, S/MIME, PKCS \#7, or PKCS \#12 are likely to be impacted. Applications using NSS for certificate validation or other TLS, X.509, OCSP or CRL functionality may be impacted, depending on how they configure NSS. *Note: This vulnerability does NOT impact Mozilla Firefox.* However, email clients and PDF viewers that use NSS for signature verification, such as Thunderbird, LibreOffice, Evolution and Evince are believed to be impacted. This vulnerability affects NSS < 3.73 and NSS < 3.68.1.
Remediation
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
SSA-455250 · CSAF 2.0 · revision 7 · finalSiemens ProductCERTSSA-455250: Multiple Vulnerabilities in Palo Alto Networks Virtual NGFW on RUGGEDCOM APE1808 Devices Before V11.1.2-h3
1 known affected

The vendor explicitly identifies these products as affected by this CVE.

  • RUGGEDCOM APE1808
Summary
NSS (Network Security Services) versions prior to 3.73 or 3.68.1 ESR are vulnerable to a heap overflow when handling DER-encoded DSA or RSA-PSS signatures. Applications using NSS for handling signatures encoded within CMS, S/MIME, PKCS #7, or PKCS #12 are likely to be impacted. Applications using NSS for certificate validation or other TLS, X.509, OCSP or CRL functionality may be impacted, depending on how they configure NSS. Note: This vulnerability does NOT impact Mozilla Firefox. However, email clients and PDF viewers that use NSS for signature verification, such as Thunderbird, LibreOffice, Evolution and Evince are believed to be impacted. This vulnerability affects NSS < 3.73 and NSS < 3.68.1.
Remediation
Upgrade Palo Alto Networks Virtual NGFW V11.1.2-h3. Contact customer support to receive patch and update information
SSA-594438 · CSAF 2.0 · revision 1 · finalSiemens ProductCERTSSA-594438: Remote Code Execution and Denial-of-Service Vulnerability in multiple RUGGEDCOM ROX products
10 known affected

The vendor explicitly identifies these products as affected by this CVE.

  • RUGGEDCOM ROX MX5000
  • RUGGEDCOM ROX RX1400
  • RUGGEDCOM ROX RX1500
  • RUGGEDCOM ROX RX1501
  • RUGGEDCOM ROX RX1510
  • RUGGEDCOM ROX RX1511
  • RUGGEDCOM ROX RX1512
  • RUGGEDCOM ROX RX1524
  • RUGGEDCOM ROX RX1536
  • RUGGEDCOM ROX RX5000
Summary
A vulnerability was found in the way the third-party component, NSS, verifies certificates that could allow an attacker to remotely execute code or cause a denial-of-service condition on the affected devices. This vulnerability could be triggered if a device connects to an attacker posing as an IPSEC endpoint that provides a malicious certificate. The device maybe vulnerable when it attempts the verification of the received certificate.
Remediation
Update to V2.15.0 or later version
Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Choose official national sources for this report. Each advisory shows its original language. Your selection is remembered on this device and included in shared links.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2021-30456

No EUVD known-exploited evidence

ENISA has published the identifier mapping but no EUVD description has been stored yet.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
Not supplied in the stored EUVD record
Advisory evidence
No linked advisory details stored yet
Recommended actionPatch only the product branches with a verified fix

Critical technical impact with a remotely reachable, unauthenticated path; no CISA KEV confirmation is currently recorded. Verified remediation exists for at least one product or source, but 11 structured product or package states remain unresolved. Apply remediation only to the exact product branch confirmed by its source.

Fix availability varies by product
01

What, why and how

NSS (Network Security Services) versions prior to 3.73 or 3.68.1 ESR are vulnerable to a heap overflow when handling DER-encoded DSA or RSA-PSS signatures. Applications using NSS for handling signatures encoded within CMS, S/MIME, PKCS \#7, or PKCS \#12 are likely to be impacted. Applications using NSS for certificate validation or other TLS, X.509, OCSP or CRL functionality may be impacted, depending on how they configure NSS. *Note: This vulnerability does NOT impact Mozilla Firefox.* However, email clients and PDF viewers that use NSS for signature verification, such as Thunderbird, LibreOffice, Evolution and Evince are believed to be impacted. This vulnerability affects NSS < 3.73 and NSS < 3.68.1.

What

NSS (Network Security Services) versions prior to 3.73 or 3.68.1 ESR are vulnerable to a heap overflow when handling DER-encoded DSA or RSA-PSS signatures. Applications using NSS for handling signatures encoded within CMS, S/MIME, PKCS \#7, or PKCS \#12 are likely to be impacted. Applications using NSS for certificate validation or other TLS, X.509, OCSP or CRL functionality may be impacted, depending on how they configure NSS. *Note: This vulnerability does NOT impact Mozilla Firefox.* However, email clients and PDF viewers that use NSS for signature verification, such as Thunderbird, LibreOffice, Evolution and Evince are believed to be impacted. This vulnerability affects NSS < 3.73 and NSS < 3.68.1.

Why

A bounds error lets data be written beyond the intended memory region, potentially corrupting control data.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

What

NSS (Network Security Services) versions prior to 3.73 or 3.68.1 ESR are vulnerable to a heap overflow when handling DER-encoded DSA or RSA-PSS signatures. Applications using NSS for handling signatures encoded within CMS, S/MIME, PKCS \#7, or PKCS \#12 are likely to be impacted. Applications using NSS for certificate validation or other TLS, X.509, OCSP or CRL functionality may be impacted, depending on how they configure NSS. *Note: This vulnerability does NOT impact Mozilla Firefox.* However, email clients and PDF viewers that use NSS for signature verification, such as Thunderbird, LibreOffice, Evolution and Evince are believed to be impacted. This vulnerability affects NSS < 3.73 and NSS < 3.68.1.

Why

A bounds error lets data be written beyond the intended memory region, potentially corrupting control data.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path
a network path → Out-of-bounds Write → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Network
Privileges required
None: unauthenticated exploitation is possible
User interaction
None
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Unchanged: impact remains within the vulnerable component's security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-787 ↗

CWE-787: Out-of-bounds Write. The product writes data past the end, or before the beginning, of the intended buffer.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.

AVNetworkAttack vector: The vulnerable component can be reached over a network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRNonePrivileges required: The attacker does not need an account or existing privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CHighConfidentiality impact: A successful attack can cause a major loss.IHighIntegrity impact: A successful attack can cause a major loss.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land
No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.
NetworkUnauthenticatedCWE-787
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

BSI · German · WID-SEC-2024-0114Oracle Systems: Mehrere Schwachstellen

Ein entfernter, anonymer oder authentisierter Angreifer kann mehrere Schwachstellen in Oracle Systems ausnutzen, um die Vertraulichkeit, Integrität und Verfügbarkeit zu gefährden.

Official advisory ↗
BSI · German · WID-SEC-2022-0432Xerox FreeFlow Print Server: Mehrere Schwachstellen

Ein entfernter, authentisierter Angreifer kann mehrere Schwachstellen in Xerox FreeFlow Print Server ausnutzen, um die Vertraulichkeit, Verfügbarkeit und Integrität zu gefährden.

Official advisory ↗
BSI · German · WID-SEC-2022-0302Xerox FreeFlow Print Server: Mehrere Schwachstellen ermöglichen Ausführen von beliebigem Programmcode mit Administratorrechten

Ein entfernter, authentisierter Angreifer kann mehrere Schwachstellen in Xerox FreeFlow Print Server ausnutzen, um beliebigen Programmcode auszuführen, einen Cross-Site-Scripting-Angriff durchzuführen, Informationen offenzulegen, einen Denial-of-Service-Zustand zu verursachen oder Dateien zu manipulieren.

Official advisory ↗
BSI · German · WID-SEC-2022-0810Mozilla NSS: Schwachstelle ermöglicht Codeausführung

Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Mozilla NSS ausnutzen, um beliebigen Programmcode auszuführen oder um die betreffende Anwendung zum Absturz zu bringen.

Official advisory ↗
BSI · German · WID-SEC-2024-1591Juniper JUNOS: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in Juniper JUNOS ausnutzen, um einen Denial of Service zu verursachen, Informationen offenzulegen, Privilegien zu erweitern und Sicherheitsmechanismen inklusive zu umgehen.

Official advisory ↗
Cyber Security Agency of Singapore · English · CSA-SB-20211215Security Bulletin 15 Dec 2021

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 15 Dec 2021, published on 15 December 2021. Open the linked bulletin for the product, severity and reference information published in that issue.

Official advisory ↗
CERT-FR · French · CERTFR-2025-AVI-0969Multiples vulnérabilités dans les produits VMware

g/CVERecord?id=CVE-2021-40211 Référence CVE CVE-2021-4048 https://www.cve.org/CVERecord?id=CVE-2021-4048 Référence CVE CVE-2021-40812 https://www.cve.org/CVERecord?id=CVE-2021-40812 Référence CVE CVE-2021-41771 https://www.cve.org/CVERecord?id=CVE-2021-41771 Référence CVE CVE-2021-41772 https://www.cve.org/CVERecord?id=CVE-2021-41772 Référence CVE CVE-2021-4189 https://www.cve.org/CVERecord?id=CVE-2021-4189 Référence CVE CVE-2021-4214 https://www.cve.org/CVERecord?id=CVE-2021-4214 Référence CVE CVE-2021-4217 https://www.cve.org/CVERecord?id=CVE-2021-4217 Référence CVE CVE-2021-4219 https://www.cve.org/CVERecord?id=CVE-2021-4219 Référence CVE CVE-2021-43527 https://www.cve.org/CVERecord?id=CVE-2021-43527 Référence CVE CVE-2021-43618 https://www.cve.org/CVERecord?id=CVE-2021-43618 Référence CVE CVE-2021-43809 https://www.cve.org/CVERecord?id=CVE-2021-43809 Référence CVE CVE-2021-44716 https://www.cve.org/CVERecord?id=CVE-2021-44716 Référence CVE CVE-2021-44717 https://www.cve.org/CVERecord?id=CVE-2021-44717 Référence CVE CVE-2021-44964 https://www.cve.org/CVERecord?id=CVE-2021-44964 Référence CVE CVE-2021-45346 https://www.cve.org/CVERecord?id=CVE-2021-45346 Référence CVE CVE-2021-45931 https://www.cve.org/CVERecord?id=CVE-2021-45931 Référence CVE CVE-2021-45942 https://www.cve.org/CVERecord?id=

Official advisory ↗
CERT-FR · French · CERTFR-2024-AVI-0575Multiples vulnérabilités dans les produits Juniper Networks

ord?id=CVE-2021-37701 Référence CVE CVE-2021-37712 https://www.cve.org/CVERecord?id=CVE-2021-37712 Référence CVE CVE-2021-37713 https://www.cve.org/CVERecord?id=CVE-2021-37713 Référence CVE CVE-2021-3803 https://www.cve.org/CVERecord?id=CVE-2021-3803 Référence CVE CVE-2021-39275 https://www.cve.org/CVERecord?id=CVE-2021-39275 Référence CVE CVE-2021-40438 https://www.cve.org/CVERecord?id=CVE-2021-40438 Référence CVE CVE-2021-41524 https://www.cve.org/CVERecord?id=CVE-2021-41524 Référence CVE CVE-2021-41773 https://www.cve.org/CVERecord?id=CVE-2021-41773 Référence CVE CVE-2021-42013 https://www.cve.org/CVERecord?id=CVE-2021-42013 Référence CVE CVE-2021-43527 https://www.cve.org/CVERecord?id=CVE-2021-43527 Référence CVE CVE-2021-44224 https://www.cve.org/CVERecord?id=CVE-2021-44224 Référence CVE CVE-2021-44790 https://www.cve.org/CVERecord?id=CVE-2021-44790 Référence CVE CVE-2021-44906 https://www.cve.org/CVERecord?id=CVE-2021-44906 Référence CVE CVE-2022-21245 https://www.cve.org/CVERecord?id=CVE-2022-21245 Référence CVE CVE-2022-21270 https://www.cve.org/CVERecord?id=CVE-2022-21270 Référence CVE CVE-2022-21303 https://www.cve.org/CVERecord?id=CVE-2022-21303 Référence CVE CVE-2022-21304 https://www.cve.org/CVERecord?id=CVE-2022-21304 Référence CVE CVE-2022-21344 https://www.cve.org/CVERecord?id=

Official advisory ↗
CERT-FR · French · CERTFR-2024-AVI-0295Multiples vulnérabilités dans les produits Palo Alto Networks

De multiples vulnérabilités ont été découvertes dans les produits Palo Alto Networks . Certaines d'entre elles permettent à un attaquant de provoquer une atteinte à l'intégrité des données, un contournement de la politique de sécurité et une atteinte à la confidentialité des données.

Official advisory ↗
CERT-FR · French · CERTFR-2022-AVI-916Multiples vulnérabilités dans les produits Juniper

VERecord?id=CVE-2021-3765 Référence CVE CVE-2021-37750 https://www.cve.org/CVERecord?id=CVE-2021-37750 Référence CVE CVE-2021-4034 https://www.cve.org/CVERecord?id=CVE-2021-4034 Référence CVE CVE-2021-4155 https://www.cve.org/CVERecord?id=CVE-2021-4155 Référence CVE CVE-2021-4160 https://www.cve.org/CVERecord?id=CVE-2021-4160 Référence CVE CVE-2021-41617 https://www.cve.org/CVERecord?id=CVE-2021-41617 Référence CVE CVE-2021-42550 https://www.cve.org/CVERecord?id=CVE-2021-42550 Référence CVE CVE-2021-42574 https://www.cve.org/CVERecord?id=CVE-2021-42574 Référence CVE CVE-2021-42771 https://www.cve.org/CVERecord?id=CVE-2021-42771 Référence CVE CVE-2021-43527 https://www.cve.org/CVERecord?id=CVE-2021-43527 Référence CVE CVE-2021-45417 https://www.cve.org/CVERecord?id=CVE-2021-45417 Référence CVE CVE-2021-45960 https://www.cve.org/CVERecord?id=CVE-2021-45960 Référence CVE CVE-2021-46143 https://www.cve.org/CVERecord?id=CVE-2021-46143 Référence CVE CVE-2022-0330 https://www.cve.org/CVERecord?id=CVE-2022-0330 Référence CVE CVE-2022-0492 https://www.cve.org/CVERecord?id=CVE-2022-0492 Référence CVE CVE-2022-0778 https://www.cve.org/CVERecord?id=CVE-2022-0778 Référence CVE CVE-2022-0847 https://www.cve.org/CVERecord?id=CVE-2022-0847 Référence CVE CVE-2022-1271 https://www.cve.org/CVERecord?id=CVE-2022-

Official advisory ↗
CERT-FR · French · CERTFR-2022-AVI-472Multiples vulnérabilités dans les produits IBM

De multiples vulnérabilités ont été découvertes dans les produits IBM. Elles permettent à un attaquant de provoquer une exécution de code arbitraire à distance et un déni de service à distance.

Official advisory ↗
CERT-FR · French · CERTFR-2022-AVI-216Multiples vulnérabilités dans les produits Siemens

d?id=CVE-2021-40366 Référence CVE CVE-2021-41541 https://www.cve.org/CVERecord?id=CVE-2021-41541 Référence CVE CVE-2021-41542 https://www.cve.org/CVERecord?id=CVE-2021-41542 Référence CVE CVE-2021-41543 https://www.cve.org/CVERecord?id=CVE-2021-41543 Référence CVE CVE-2021-42016 https://www.cve.org/CVERecord?id=CVE-2021-42016 Référence CVE CVE-2021-42017 https://www.cve.org/CVERecord?id=CVE-2021-42017 Référence CVE CVE-2021-42018 https://www.cve.org/CVERecord?id=CVE-2021-42018 Référence CVE CVE-2021-42019 https://www.cve.org/CVERecord?id=CVE-2021-42019 Référence CVE CVE-2021-42020 https://www.cve.org/CVERecord?id=CVE-2021-42020 Référence CVE CVE-2021-43527 https://www.cve.org/CVERecord?id=CVE-2021-43527 Référence CVE CVE-2021-44478 https://www.cve.org/CVERecord?id=CVE-2021-44478 Référence CVE CVE-2022-24281 https://www.cve.org/CVERecord?id=CVE-2022-24281 Référence CVE CVE-2022-24282 https://www.cve.org/CVERecord?id=CVE-2022-24282 Référence CVE CVE-2022-24309 https://www.cve.org/CVERecord?id=CVE-2022-24309 Référence CVE CVE-2022-24408 https://www.cve.org/CVERecord?id=CVE-2022-24408 Référence CVE CVE-2022-24661 https://www.cve.org/CVERecord?id=CVE-2022-24661 Référence CVE CVE-2022-25311 https://www.cve.org/CVERecord?id=CVE-2022-25311 Référence CVE CVE-2022-26313 https://www.cve.org/CVERecord?id=

Official advisory ↗
CERT-FR · French · CERTFR-2021-AVI-940Multiples vulnérabilités dans le noyau Linux de Red Hat

De multiples vulnérabilités ont été découvertes dans le noyau Linux de Red Hat. Certaines d'entre elles permettent à un attaquant de provoquer un déni de service, une atteinte à l'intégrité des données et une atteinte à la confidentialité des données.

Official advisory ↗
CERT-FR · French · CERTFR-2021-AVI-922Vulnérabilité dans Red Hat

Une vulnérabilité a été découverte dans Red Hat. Elle permet à un attaquant de provoquer une exécution de code arbitraire à distance.

Official advisory ↗
CERT-FR · French · CERTFR-2021-AVI-917Vulnérabilité dans Red Hat

Une vulnérabilité a été découverte dans le système d'exploitation Red Hat. Elle permet à un attaquant de provoquer une exécution de code arbitraire à distance.

Official advisory ↗
CERT-FR · French · CERTFR-2021-AVI-915Vulnérabilité dans Red Hat

Une vulnérabilité a été découverte dans Red Hat. Elle permet à un attaquant de provoquer une exécution de code arbitraire à distance.

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2021-018347Mozilla Thunderbird における境界外書き込みに関する脆弱性

Mozilla Thunderbird には、境界外書き込みに関する脆弱性が存在します。 本脆弱性は、CVE-2021-43527 と関連する脆弱性です。

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2021-016445NSS における境界外書き込みに関する脆弱性

NSS (Network Security Services) には、境界外書き込みに関する脆弱性が存在します。

Official advisory ↗
KISA KrCERT/CC · Korean · KNVD-5460Mozilla NSS 라이브러리 보안 업데이트 권고

NSS 라이브러리에서 버퍼오버플로우로 인해 발생하는 메모리 충돌 취약점(CVE-2021-43527) [1]

Official advisory ↗
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Fix availability varies by product
Affected
Fixed
Update to V2.15.0 or later version
Action
Use the product-specific evidence above. Patch only products with a verified fixed release, and keep every affected or under-investigation state without a matching fix in the remediation queue.
Workaround
No verified workaround is recorded. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.
04

Evidence and provenance

Published 8 Dec 2021 · Last source change 4 Aug 2024, 03:55 UTC · CWE-787 · Out-of-bounds Write

CVE recordCVE.org · 5.1
CVSS sourceNIST NVD
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-08-14
European sourceENISA EUVD · EUVD-2021-30456
Product sourceVendor CSAF · SUSE Product Security Team
Remediation sourceVendor CSAF · SUSE Product Security Team
CWE sourceNIST NVD
NVD statusNVD modified after enrichment

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates ↗
  1. Affected versionsThe structured affected or fixed version information changed.
    Before
    unspecified < 3.73; unspecified < 3.68.1 · Fixed: An authoritative update reference is available, but the fixed version is not recorded in the structured CVE fields. Check the linked vendor advisory for the applicable release.
    After
    unspecified < 3.73; unspecified < 3.68.1 · Fixed: Update to V2.15.0 or later version
    Siemens ProductCERT ↗
Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
Fixed release or patch reference recorded
Fixed release recorded from official guidance
ENISA EUVD · EUVD-2021-30456↗Vendor CSAF · SUSE Product Security Team↗Siemens ProductCERT security advisory↗CVE authority or vendor reference↗Vendor advisory↗Vendor advisory↗Vendor advisory↗Official CVE record (CNA and ADP data)↗NVD record↗
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2021-43527 · cve.blacktree.nl