BlackTreeCVE Intelligence
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Full vulnerability report · 2019
CVE-2019-16163High confidence

Oniguruma before 6.9.3 allows Stack Exhaustion in regcomp.c because of recursion in regparse.c

Unknown · Unknown

7.5HighCVSS 3.1
Recommended action
Within 7 days

High 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 severityHighOperational priority:Critical, 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.
  • The selected CVSS metric records a network-reachable, unauthenticated path with no user interaction.
  • EPSS is 2.75% 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 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.

Distribution package intelligence

Release-specific package status

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

4 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
Debian trixietrixie · sourcelibonigVendor fix publishedDebian records a fixed source-package version for this release.6.9.4-1Debian Security Tracker ↗Source updated 5 Oct 2026
Debian bookwormbookworm · sourcelibonigVendor fix publishedDebian records a fixed source-package version for this release.6.9.4-1Debian Security Tracker ↗Source updated 5 Oct 2026
Debian forkyforky · sourcelibonigVendor fix publishedDebian records a fixed source-package version for this release.6.9.4-1Debian Security Tracker ↗Source updated 5 Oct 2026
Debian sidsid · sourcelibonigVendor fix publishedDebian records a fixed source-package version for this release.6.9.4-1Debian Security Tracker ↗Source updated 5 Oct 2026
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-2019-6983

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

High 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

Oniguruma before 6.9.3 allows Stack Exhaustion in regcomp.c because of recursion in regparse.c.

What

Oniguruma before 6.9.3 allows Stack Exhaustion in regcomp.c because of recursion in regparse.c.

Why

The product does not properly control the amount of recursion that takes place, consuming excessive resources, such as allocated memory or the program stack.

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

Oniguruma before 6.9.3 allows Stack Exhaustion in regcomp.c because of recursion in regparse.c.

Why

The product does not properly control the amount of recursion that takes place, consuming excessive resources, such as allocated memory or the program stack.

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.
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 → Uncontrolled Recursion → 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-674 ↗

CWE-674: Uncontrolled Recursion. The product does not properly control the amount of recursion that takes place, consuming excessive resources, such as allocated memory or the program stack.

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: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.UINoneUser interaction: No action by another user is required.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-674Public exploit reference
A

Official authority intelligence

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

BSI · German · WID-SEC-2024-1086IBM QRadar SIEM: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in IBM QRadar SIEM ausnutzen, um beliebigen Code auszuführen, Sicherheitsmaßnahmen zu umgehen, einen Denial-of-Service-Zustand herbeizuführen, vertrauliche Informationen offenzulegen, Dateien zu manipulieren, seine Privilegien zu erweitern, einen Cross-Site-Scripting (XSS)-Angriff durchzuführen oder einen nicht spezifizierten Angriff auszuführen.

Official advisory ↗
BSI · German · WID-SEC-2024-0218Red Hat Enterprise Linux's oniguruma, tcpslice, c-ares: Mehrere Schwachstellen

Ein entfernter Angreifer kann mehrere Schwachstellen in Red Hat Enterprise Linux ausnutzen, um einen Denial-of-Service-Zustand zu erzeugen, beliebigen Code auszuführen oder sensible Informationen offenzulegen.

Official advisory ↗
CERT-FR · French · CERTFR-2025-AVI-0337Multiples vulnérabilités dans les produits IBM

r au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation). Documentation Bulletin de sécurité IBM 7230739 du 11 avril 2025 https://www.ibm.com/support/pages/node/7230739 Bulletin de sécurité IBM 7231051 du 16 avril 2025 https://www.ibm.com/support/pages/node/7231051 Bulletin de sécurité IBM 7231169 du 17 avril 2025 https://www.ibm.com/support/pages/node/7231169 Référence CVE CVE-2018-12699 https://www.cve.org/CVERecord?id=CVE-2018-12699 Référence CVE CVE-2018-18700 https://www.cve.org/CVERecord?id=CVE-2018-18700 Référence CVE CVE-2019-12972 https://www.cve.org/CVERecord?id=CVE-2019-12972 Référence CVE CVE-2019-16163 https://www.cve.org/CVERecord?id=CVE-2019-16163 Référence CVE CVE-2020-15250 https://www.cve.org/CVERecord?id=CVE-2020-15250 Référence CVE CVE-2020-35493 https://www.cve.org/CVERecord?id=CVE-2020-35493 Référence CVE CVE-2020-35494 https://www.cve.org/CVERecord?id=CVE-2020-35494 Référence CVE CVE-2020-35495 https://www.cve.org/CVERecord?id=CVE-2020-35495 Référence CVE CVE-2020-35496 https://www.cve.org/CVERecord?id=CVE-2020-35496 Référence CVE CVE-2020-35507 https://www.cve.org/CVERecord?id=CVE-2020-35507 Référence CVE CVE-2023-1370 https://www.cve.org/CVERecord?id=CVE-2023-1370 Référence CVE CVE-2023-1972 https://www.cve.org/CVERecord?id=CVE

Official advisory ↗
CERT-FR · French · CERTFR-2024-AVI-0923Multiples vulnérabilités dans les produits IBM

re 2024 https://www.ibm.com/support/pages/node/7173866 Bulletin de sécurité IBM 7174015 du 24 octobre 2024 https://www.ibm.com/support/pages/node/7174015 Bulletin de sécurité IBM 7174016 du 24 octobre 2024 https://www.ibm.com/support/pages/node/7174016 Référence CVE CVE-2012-2677 https://www.cve.org/CVERecord?id=CVE-2012-2677 Référence CVE CVE-2018-12538 https://www.cve.org/CVERecord?id=CVE-2018-12538 Référence CVE CVE-2018-12545 https://www.cve.org/CVERecord?id=CVE-2018-12545 Référence CVE CVE-2019-10241 https://www.cve.org/CVERecord?id=CVE-2019-10241 Référence CVE CVE-2019-13224 https://www.cve.org/CVERecord?id=CVE-2019-13224 Référence CVE CVE-2019-16163 https://www.cve.org/CVERecord?id=CVE-2019-16163 Référence CVE CVE-2019-19012 https://www.cve.org/CVERecord?id=CVE-2019-19012 Référence CVE CVE-2020-15168 https://www.cve.org/CVERecord?id=CVE-2020-15168 Référence CVE CVE-2020-27216 https://www.cve.org/CVERecord?id=CVE-2020-27216 Référence CVE CVE-2021-28169 https://www.cve.org/CVERecord?id=CVE-2021-28169 Référence CVE CVE-2021-34428 https://www.cve.org/CVERecord?id=CVE-2021-34428 Référence CVE CVE-2021-3803 https://www.cve.org/CVERecord?id=CVE-2021-3803 Référence CVE CVE-2021-40690 https://www.cve.org/CVERecord?id=CVE-2021-40690 Référence CVE CVE-2021-43138 https://www.cve.org/CVERecord?id=CV

Official advisory ↗
CERT-FR · French · CERTFR-2024-AVI-0506Multiples vulnérabilités dans Juniper Secure Analytics

/CVERecord?id=CVE-2012-6708 Référence CVE CVE-2014-3146 https://www.cve.org/CVERecord?id=CVE-2014-3146 Référence CVE CVE-2015-9251 https://www.cve.org/CVERecord?id=CVE-2015-9251 Référence CVE CVE-2017-7500 https://www.cve.org/CVERecord?id=CVE-2017-7500 Référence CVE CVE-2017-7501 https://www.cve.org/CVERecord?id=CVE-2017-7501 Référence CVE CVE-2018-19787 https://www.cve.org/CVERecord?id=CVE-2018-19787 Référence CVE CVE-2019-13224 https://www.cve.org/CVERecord?id=CVE-2019-13224 Référence CVE CVE-2019-13631 https://www.cve.org/CVERecord?id=CVE-2019-13631 Référence CVE CVE-2019-15505 https://www.cve.org/CVERecord?id=CVE-2019-15505 Référence CVE CVE-2019-16163 https://www.cve.org/CVERecord?id=CVE-2019-16163 Référence CVE CVE-2019-19012 https://www.cve.org/CVERecord?id=CVE-2019-19012 Référence CVE CVE-2019-19203 https://www.cve.org/CVERecord?id=CVE-2019-19203 Référence CVE CVE-2019-19204 https://www.cve.org/CVERecord?id=CVE-2019-19204 Référence CVE CVE-2019-8675 https://www.cve.org/CVERecord?id=CVE-2019-8675 Référence CVE CVE-2019-8696 https://www.cve.org/CVERecord?id=CVE-2019-8696 Référence CVE CVE-2020-10001 https://www.cve.org/CVERecord?id=CVE-2020-10001 Référence CVE CVE-2020-25656 https://www.cve.org/CVERecord?id=CVE-2020-25656 Référence CVE CVE-2020-27783 https://www.cve.org/CVERecord?id=CVE-

Official advisory ↗
CERT-FR · French · CERTFR-2024-AVI-0459Multiples vulnérabilités dans les produits IBM

e sécurité IBM 7155078 du 28 mai 2024 https://www.ibm.com/support/pages/node/7155078 Bulletin de sécurité IBM 7155114 du 29 mai 2024 https://www.ibm.com/support/pages/node/7155114 Référence CVE CVE-2012-2677 https://www.cve.org/CVERecord?id=CVE-2012-2677 Référence CVE CVE-2015-1832 https://www.cve.org/CVERecord?id=CVE-2015-1832 Référence CVE CVE-2018-10237 https://www.cve.org/CVERecord?id=CVE-2018-10237 Référence CVE CVE-2018-1313 https://www.cve.org/CVERecord?id=CVE-2018-1313 Référence CVE CVE-2019-11358 https://www.cve.org/CVERecord?id=CVE-2019-11358 Référence CVE CVE-2019-13224 https://www.cve.org/CVERecord?id=CVE-2019-13224 Référence CVE CVE-2019-16163 https://www.cve.org/CVERecord?id=CVE-2019-16163 Référence CVE CVE-2019-16942 https://www.cve.org/CVERecord?id=CVE-2019-16942 Référence CVE CVE-2019-16943 https://www.cve.org/CVERecord?id=CVE-2019-16943 Référence CVE CVE-2019-17531 https://www.cve.org/CVERecord?id=CVE-2019-17531 Référence CVE CVE-2019-19012 https://www.cve.org/CVERecord?id=CVE-2019-19012 Référence CVE CVE-2019-19203 https://www.cve.org/CVERecord?id=CVE-2019-19203 Référence CVE CVE-2019-19204 https://www.cve.org/CVERecord?id=CVE-2019-19204 Référence CVE CVE-2019-20330 https://www.cve.org/CVERecord?id=CVE-2019-20330 Référence CVE CVE-2020-10650 https://www.cve.org/CVERecord?id=

Official advisory ↗
CERT-FR · French · CERTFR-2024-AVI-0385Multiples vulnérabilités dans les produits IBM

50803 Bulletin de sécurité IBM 7150804 du 09 mai 2024 https://www.ibm.com/support/pages/node/7150804 Référence CVE CVE-2007-4559 https://www.cve.org/CVERecord?id=CVE-2007-4559 Référence CVE CVE-2014-3146 https://www.cve.org/CVERecord?id=CVE-2014-3146 Référence CVE CVE-2018-19787 https://www.cve.org/CVERecord?id=CVE-2018-19787 Référence CVE CVE-2018-20060 https://www.cve.org/CVERecord?id=CVE-2018-20060 Référence CVE CVE-2019-11236 https://www.cve.org/CVERecord?id=CVE-2019-11236 Référence CVE CVE-2019-11324 https://www.cve.org/CVERecord?id=CVE-2019-11324 Référence CVE CVE-2019-13224 https://www.cve.org/CVERecord?id=CVE-2019-13224 Référence CVE CVE-2019-16163 https://www.cve.org/CVERecord?id=CVE-2019-16163 Référence CVE CVE-2019-19012 https://www.cve.org/CVERecord?id=CVE-2019-19012 Référence CVE CVE-2019-19203 https://www.cve.org/CVERecord?id=CVE-2019-19203 Référence CVE CVE-2019-19204 https://www.cve.org/CVERecord?id=CVE-2019-19204 Référence CVE CVE-2019-8675 https://www.cve.org/CVERecord?id=CVE-2019-8675 Référence CVE CVE-2019-8696 https://www.cve.org/CVERecord?id=CVE-2019-8696 Référence CVE CVE-2019-9740 https://www.cve.org/CVERecord?id=CVE-2019-9740 Référence CVE CVE-2020-10001 https://www.cve.org/CVERecord?id=CVE-2020-10001 Référence CVE CVE-2020-26137 https://www.cve.org/CVERecord?id=CVE-20

Official advisory ↗
CERT-FR · French · CERTFR-2024-AVI-0305Multiples vulnérabilités dans les produits IBM

ode/7148151 Bulletin de sécurité IBM 7148158 du 11 avril 2024 https://www.ibm.com/support/pages/node/7148158 Référence CVE CVE-2011-4969 https://www.cve.org/CVERecord?id=CVE-2011-4969 Référence CVE CVE-2012-0881 https://www.cve.org/CVERecord?id=CVE-2012-0881 Référence CVE CVE-2012-6708 https://www.cve.org/CVERecord?id=CVE-2012-6708 Référence CVE CVE-2015-9251 https://www.cve.org/CVERecord?id=CVE-2015-9251 Référence CVE CVE-2017-7500 https://www.cve.org/CVERecord?id=CVE-2017-7500 Référence CVE CVE-2017-7501 https://www.cve.org/CVERecord?id=CVE-2017-7501 Référence CVE CVE-2019-13224 https://www.cve.org/CVERecord?id=CVE-2019-13224 Référence CVE CVE-2019-16163 https://www.cve.org/CVERecord?id=CVE-2019-16163 Référence CVE CVE-2019-19012 https://www.cve.org/CVERecord?id=CVE-2019-19012 Référence CVE CVE-2019-19203 https://www.cve.org/CVERecord?id=CVE-2019-19203 Référence CVE CVE-2019-19204 https://www.cve.org/CVERecord?id=CVE-2019-19204 Référence CVE CVE-2020-28241 https://www.cve.org/CVERecord?id=CVE-2020-28241 Référence CVE CVE-2020-7656 https://www.cve.org/CVERecord?id=CVE-2020-7656 Référence CVE CVE-2021-22696 https://www.cve.org/CVERecord?id=CVE-2021-22696 Référence CVE CVE-2021-30468 https://www.cve.org/CVERecord?id=CVE-2021-30468 Référence CVE CVE-2021-31525 https://www.cve.org/CVERecord?id=CV

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2019-009106Oniguruma における再帰制御に関する脆弱性

Oniguruma には、再帰制御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
Review the linked authoritative reference and apply the recorded fixed release appropriate to the affected product branch.
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 9 Sept 2019 · Last source change 5 Aug 2024, 01:10 UTC · CWE-674 · Uncontrolled Recursion

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 2026-09-01
European sourceENISA EUVD · EUVD-2019-6983
Product sourceUnavailable
Remediation sourceCVE/CNA references
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 ↗
  1. ENISA EUVD mappingEUVD-2019-6983 was added to the official ENISA EUVD mapping for this CVE.
    Before
    not recorded
    After
    {"euvdId":"EUVD-2019-6983"}
    ENISA EUVD ↗
  2. Vendor guidanceAuthoritative vendor guidance changed: added patch: github.com/147; added patch: github.com/4097828d7cc87589864fecf452f2cd46c5f37180; removed vendor advisory: lists.fedoraproject.org/NWOWZZNFSAWM3BUTQNAE3PD44A6JU4KE; removed vendor advisory: lists.fedoraproject.org/ZW47MSFZ6WYOAOFXHBDGU4LYACFRKC2Y; 2 further additions; 1 further removals.
    Before
    vendor advisory: lists.fedoraproject.org/NWOWZZNFSAWM3BUTQNAE3PD44A6JU4KE · vendor advisory: lists.fedoraproject.org/ZW47MSFZ6WYOAOFXHBDGU4LYACFRKC2Y · vendor advisory: usn.ubuntu.com/4460-1
    After
    patch: github.com/147 · patch: github.com/4097828d7cc87589864fecf452f2cd46c5f37180 · patch: github.com/v6.9.2...v6.9.3 · 1 more references
    github.com ↗
  3. Affected versionsThe structured affected or fixed version information changed.
    Before
    n/a · Fixed: No fixed version is explicitly recorded in the structured CVE data.
    After
    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.
    CNA ↗
  4. Remediation statusRemediation status changed from Awaiting fix to Patch available.
    Before
    Awaiting fix
    After
    Patch available
    github.com ↗
  5. Public exploit evidencePublic exploit evidence changed from No public exploit to Public exploit reference.
    Before
    No public exploit
    After
    Public exploit reference
    github.com ↗
  6. SeveritySeverity changed from Unknown to High.
    Before
    Unknown
    After
    High
    NIST NVD ↗
  7. CVSS scoreCVSS score changed from not recorded to 7.5 (CVSS 3.1 · NIST NVD · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).
    Before
    not recorded
    After
    7.5 (CVSS 3.1 · NIST NVD · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
    NIST NVD ↗
  8. Catalogue recordCVE added to the BlackTree catalogue.
    CNA ↗
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-2019-6983↗Public exploit reference↗Patch or update 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-2019-16163 · cve.blacktree.nl