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Full vulnerability report · 2020
CVE-2019-20503High confidence

usrsctp before 2019-12-20 has out-of-bounds reads in sctp_load_addresses_from_init

Unknown · Unknown

6.5MediumCVSS 3.1
Recommended action
Within 7 days

Medium technical severity with public exploit material referenced by a structured source; prioritise exposed affected systems while verifying vendor guidance.

Patch available
R
Operational reassessment

Published severity in operational context

Open reassessment dashboard →
Published severityMediumOperational priority:High, raised one band.upgradedsince 5 Aug 2024

Evidence used

  • No CISA KEV confirmation is currently recorded.
  • A structured source references public exploit or proof-of-concept material.
  • EPSS is 3.14% 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.
  • Increase monitoring for the attack path and post-exploitation behaviour described in the report.

Verification

  1. Confirm that the asset runs Unknown Unknown 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 30 daysRemediation target: Within 180 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.

Distribution package intelligence

Release-specific package status

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

30 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 · communityfirefoxVendor fix publishedAlpine records a security fix at this version. An absent entry does not mean the package is unaffected.74.0-r0Alpine Security Database ↗Source updated 22 Oct 2026
Alpine v3.23v3.23 · communityfirefox-esrVendor fix publishedAlpine records a security fix at this version. An absent entry does not mean the package is unaffected.68.6.0-r0Alpine Security Database ↗Source updated 22 Oct 2026
Alpine v3.23v3.23 · communitylibrewolfVendor fix publishedAlpine records a security fix at this version. An absent entry does not mean the package is unaffected.74.0-r0Alpine Security Database ↗Source updated 22 Oct 2026
Alpine v3.23v3.23 · communitythunderbirdVendor fix publishedAlpine records a security fix at this version. An absent entry does not mean the package is unaffected.68.6.0-r0Alpine Security Database ↗Source updated 22 Oct 2026
Alpine v3.22v3.22 · communityfirefoxVendor fix publishedAlpine records a security fix at this version. An absent entry does not mean the package is unaffected.74.0-r0Alpine Security Database ↗Source updated 22 Oct 2026
Alpine v3.22v3.22 · communityfirefox-esrVendor fix publishedAlpine records a security fix at this version. An absent entry does not mean the package is unaffected.68.6.0-r0Alpine Security Database ↗Source updated 22 Oct 2026
Alpine v3.22v3.22 · communitylibrewolfVendor fix publishedAlpine records a security fix at this version. An absent entry does not mean the package is unaffected.74.0-r0Alpine Security Database ↗Source updated 22 Oct 2026
Alpine v3.22v3.22 · communitythunderbirdVendor fix publishedAlpine records a security fix at this version. An absent entry does not mean the package is unaffected.68.6.0-r0Alpine Security Database ↗Source updated 22 Oct 2026
Alpine v3.21v3.21 · communityfirefoxVendor fix publishedAlpine records a security fix at this version. An absent entry does not mean the package is unaffected.74.0-r0Alpine Security Database ↗Source updated 22 Oct 2026
Alpine v3.21v3.21 · communityfirefox-esrVendor fix publishedAlpine records a security fix at this version. An absent entry does not mean the package is unaffected.68.6.0-r0Alpine Security Database ↗Source updated 22 Oct 2026
Alpine v3.21v3.21 · communitylibrewolfVendor fix publishedAlpine records a security fix at this version. An absent entry does not mean the package is unaffected.74.0-r0Alpine Security Database ↗Source updated 22 Oct 2026
Alpine v3.21v3.21 · communitythunderbirdVendor fix publishedAlpine records a security fix at this version. An absent entry does not mean the package is unaffected.68.6.0-r0Alpine Security Database ↗Source updated 22 Oct 2026
Debian trixietrixie · sourcechromiumVendor fix publishedDebian records a fixed source-package version for this release.80.0.3987.149-1Debian Security Tracker ↗Source updated 23 Oct 2026
Debian trixietrixie · sourcefirefox-esrVendor fix publishedDebian records a fixed source-package version for this release.68.6.0esr-1Debian Security Tracker ↗Source updated 23 Oct 2026
Debian trixietrixie · sourcelibusrsctpVendor fix publishedDebian records a fixed source-package version for this release.0.9.3.0+20200312-1Debian Security Tracker ↗Source updated 23 Oct 2026
Debian trixietrixie · sourcethunderbirdVendor fix publishedDebian records a fixed source-package version for this release.1:68.6.0-1Debian Security Tracker ↗Source updated 23 Oct 2026
Debian bookwormbookworm · sourcechromiumVendor fix publishedDebian records a fixed source-package version for this release.80.0.3987.149-1Debian Security Tracker ↗Source updated 23 Oct 2026
Debian bookwormbookworm · sourcefirefox-esrVendor fix publishedDebian records a fixed source-package version for this release.68.6.0esr-1Debian Security Tracker ↗Source updated 23 Oct 2026
Debian bookwormbookworm · sourcelibusrsctpVendor fix publishedDebian records a fixed source-package version for this release.0.9.3.0+20200312-1Debian Security Tracker ↗Source updated 23 Oct 2026
Debian bookwormbookworm · sourcethunderbirdVendor fix publishedDebian records a fixed source-package version for this release.1:68.6.0-1Debian Security Tracker ↗Source updated 23 Oct 2026
Debian forkyforky · sourcechromiumVendor fix publishedDebian records a fixed source-package version for this release.80.0.3987.149-1Debian Security Tracker ↗Source updated 23 Oct 2026
Debian forkyforky · sourcefirefox-esrVendor fix publishedDebian records a fixed source-package version for this release.68.6.0esr-1Debian Security Tracker ↗Source updated 23 Oct 2026
Debian forkyforky · sourcelibusrsctpVendor fix publishedDebian records a fixed source-package version for this release.0.9.3.0+20200312-1Debian Security Tracker ↗Source updated 23 Oct 2026
Debian forkyforky · sourcethunderbirdVendor fix publishedDebian records a fixed source-package version for this release.1:68.6.0-1Debian Security Tracker ↗Source updated 23 Oct 2026
Debian sidsid · sourcechromiumVendor fix publishedDebian records a fixed source-package version for this release.80.0.3987.149-1Debian Security Tracker ↗Source updated 23 Oct 2026
Debian sidsid · sourcefirefoxVendor fix publishedDebian records a fixed source-package version for this release.74.0-1Debian Security Tracker ↗Source updated 23 Oct 2026
Debian sidsid · sourcefirefox-esrVendor fix publishedDebian records a fixed source-package version for this release.68.6.0esr-1Debian Security Tracker ↗Source updated 23 Oct 2026
Debian sidsid · sourcelibusrsctpVendor fix publishedDebian records a fixed source-package version for this release.0.9.3.0+20200312-1Debian Security Tracker ↗Source updated 23 Oct 2026
Debian sidsid · sourcethunderbirdVendor fix publishedDebian records a fixed source-package version for this release.1:68.6.0-1Debian Security Tracker ↗Source updated 23 Oct 2026
Ubuntu 24.04 LTSnoble · standard archivelibusrsctpUnder evaluationCanonical reports that the package might be affected and still needs evaluation or fixing.Not published in this feedCanonical Ubuntu Security ↗Source updated 23 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.

1 current
CVE-2019-20503 · CSAF 2.0 · revision 22 · interimSUSE Product Security TeamCVE-2019-20503
393 recommended

The vendor recommends these product versions as the target state.

  • MozillaFirefox-68.6.0-109.110.1 as component of HPE Helion OpenStack 8
  • MozillaFirefox-translations-common-68.6.0-109.110.1 as component of HPE Helion OpenStack 8
  • MozillaFirefox-68.6.0-109.110.1 as component of SUSE Enterprise Storage 5
  • MozillaFirefox-translations-common-68.6.0-109.110.1 as component of SUSE Enterprise Storage 5
  • MozillaFirefox-68.6.0-3.75.1 as component of SUSE Enterprise Storage 6
  • MozillaFirefox-devel-68.6.0-3.75.1 as component of SUSE Enterprise Storage 6
  • MozillaFirefox-translations-common-68.6.0-3.75.1 as component of SUSE Enterprise Storage 6
  • MozillaFirefox-translations-other-68.6.0-3.75.1 as component of SUSE Enterprise Storage 6
  • MozillaFirefox-78.10.0-8.38.1 as component of SUSE Enterprise Storage 7.1
  • MozillaFirefox-devel-78.10.0-8.38.1 as component of SUSE Enterprise Storage 7.1
  • MozillaFirefox-translations-common-78.10.0-8.38.1 as component of SUSE Enterprise Storage 7.1
  • MozillaFirefox-translations-other-78.10.0-8.38.1 as component of SUSE Enterprise Storage 7.1
Summary
usrsctp before 2019-12-20 has out-of-bounds reads in sctp_load_addresses_from_init.
Remediation
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
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-2019-11047

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 actionWithin 7 days

Medium technical severity with public exploit material referenced by a structured source; prioritise exposed affected systems while verifying vendor guidance.

Patch available
01

What, why and how

usrsctp before 2019-12-20 has out-of-bounds reads in sctp_load_addresses_from_init.

What

usrsctp before 2019-12-20 has out-of-bounds reads in sctp_load_addresses_from_init.

Why

The product reads data past the end, or before the beginning, of the intended buffer.

How

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

What

usrsctp before 2019-12-20 has out-of-bounds reads in sctp_load_addresses_from_init.

Why

The product reads data past the end, or before the beginning, of the intended buffer.

How

An attacker operating through a network path may attempt exploitation without authentication after a 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.
Reference recorded

A structured CVE source labels at least one public reference as exploit material. BlackTree has not independently validated that it is safe, reliable or weaponised.

Likely attack path
a network path → Out-of-bounds Read → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Network
Privileges required
None: unauthenticated exploitation is possible
User interaction
Required interaction required
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-125 ↗

CWE-125: Out-of-bounds Read. The product reads 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:R/S:U/C:N/I:N/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.UIRequiredUser interaction: Another user must perform an action for exploitation to succeed.SUnchangedScope: The security impact remains within the vulnerable component's authority.CNoneConfidentiality impact: No direct loss is represented by this metric.INoneIntegrity impact: No direct loss is represented by this metric.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-125Public exploit reference
A

Official authority intelligence

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

Cyber Security Agency of Singapore · English · CSA-SB-20200311Security Bulletin 11 Mar 2020

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 11 Mar 2020, published on 11 March 2020. Open the linked bulletin for the product, severity and reference information published in that issue.

Official advisory ↗
CERT-FR · French · CERTFR-2020-AVI-321Multiples vulnérabilités dans les produits Apple

ation). Documentation Bulletin de sécurité Apple HT211170 du 26 mai 2020 https://support.apple.com/en-us/HT211170 Bulletin de sécurité Apple HT211177 du 26 mai 2020 https://support.apple.com/en-us/HT211177 Bulletin de sécurité Apple HT211179 du 26 mai 2020 https://support.apple.com/en-us/HT211179 Bulletin de sécurité Apple HT211181 du 26 mai 2020 https://support.apple.com/en-us/HT211181 Bulletin de sécurité Apple HT211186 du 26 mai 2020 https://support.apple.com/en-us/HT211186 Référence CVE CVE-2019-14868 https://www.cve.org/CVERecord?id=CVE-2019-14868 Référence CVE CVE-2019-20044 https://www.cve.org/CVERecord?id=CVE-2019-20044 Référence CVE CVE-2019-20503 https://www.cve.org/CVERecord?id=CVE-2019-20503 Référence CVE CVE-2020-3878 https://www.cve.org/CVERecord?id=CVE-2020-3878 Référence CVE CVE-2020-3882 https://www.cve.org/CVERecord?id=CVE-2020-3882 Référence CVE CVE-2020-9771 https://www.cve.org/CVERecord?id=CVE-2020-9771 Référence CVE CVE-2020-9772 https://www.cve.org/CVERecord?id=CVE-2020-9772 Référence CVE CVE-2020-9788 https://www.cve.org/CVERecord?id=CVE-2020-9788 Référence CVE CVE-2020-9789 https://www.cve.org/CVERecord?id=CVE-2020-9789 Référence CVE CVE-2020-9790 https://www.cve.org/CVERecord?id=CVE-2020-9790 Référence CVE CVE-2020-9791 https://www.cve.org/CVERecord?id=CVE-2020-9791 R

Official advisory ↗
CERT-FR · French · CERTFR-2020-AVI-161Multiples vulnérabilités dans Google Chrome

De multiples vulnérabilités ont été découvertes dans Google Chrome. Elles permettent à un attaquant de provoquer un problème de sécurité non spécifié par l'éditeur.

Official advisory ↗
CERT-FR · French · CERTFR-2020-AVI-138Multiples vulnérabilités dans Mozilla Firefox

De multiples vulnérabilités ont été découvertes dans Mozilla Firefox. Elles permettent à un attaquant de provoquer une exécution de code arbitraire à distance, un déni de service à distance et un contournement de la politique de sécurité.

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2019-014808usrsctp における境界外読み取りに関する脆弱性

usrsctp には、境界外読み取りに関する脆弱性が存在します。

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.
Patch available
Affected
n/a
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.
Action
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
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.
Official vendor articles1 stored document

Linked articles are downloaded and versioned as source evidence. A CVE mention or approved update relationship does not, by itself, verify a fix for every product branch.

  • About the security content of Safari 13.1.1 - Apple Support →Original publisher ↗Searchable text snapshot · Captured 16 Oct 2026Apple Store Mac iPad iPhone Watch Vision AirPods Home Entertainment Accessories Support 0 + "},{"name":"compact","assetInline":" "}],"analyticsAttributes":[{"name":"data-analytics-title","value":"apple home"}]},{"id":"ad4a2a26eb4836393385e9f6c61b526b4a3cb31409c5ed8730ce7a704dd7132f","name":"store","text":"
04

Evidence and provenance

Published 6 Mar 2020 · Last source change 5 Aug 2024, 02:46 UTC · CWE-125 · Out-of-bounds Read

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-2019-11047
Product sourceUnavailable
Remediation sourceVendor CSAF · SUSE Product Security Team
CWE sourceNIST NVD
NVD statusNVD modified after enrichment

Missing structured fields: affected product. Missing data is not evidence of low risk; review the primary advisory.

Material change intelligence

What changed after publication

View recent updates ↗

No material field changes have been recorded since change tracking began. Routine source refreshes and cosmetic edits are intentionally excluded.

Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
Fixed release or patch reference recorded
ENISA EUVD · EUVD-2019-11047↗Vendor CSAF · SUSE Product Security Team↗Public exploit reference↗Patch or update reference↗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-2019-20503 · cve.blacktree.nl