lib/logmatcher.c in Balabit syslog-ng before 3.2.4, when the global flag is set and when…
Priority LOW 25CWE-399Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Medium
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · Partial
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA. Impact type from CWE-399 and the CVSS impact.
Summary
lib/logmatcher.c in Balabit syslog-ng before 3.2.4, when the global flag is set and when using PCRE 8.12 and possibly other versions, allows remote attackers to cause a denial of service (memory consumption) via a message that does not match a regular expression.
Why it matters now
EPSS 0.02462 84th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 2
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:oneidentity:syslog-ng:*:*:*:*:*:*:*:* | before 3.2.4 | Vulnerable | One Identity |
| cpe:2.3:a:pcre:pcre:8.12:*:*:*:*:*:*:* | 8.12 | Running on | PCRE |
- cpe:2.3:a:oneidentity:syslog-ng:*:*:*:*:*:*:*:* Versions before 3.2.4 Vulnerable ·One Identity
- cpe:2.3:a:pcre:pcre:8.12:*:*:*:*:*:*:* Versions 8.12 Running on ·PCRE
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2011-1951
- 2026-10-03 Alias added: GHSA-7jqv-hh4c-ww3h
References
More One Identity Syslog-ng vulnerabilities
- TI-2024-31899 tranport: TLS host name wildcard matching too lax CVSS 3.1HIGH 7.5
- TI-2022-18249 An integer overflow in the RFC3164 parser in One Identity syslog-ng 3.0 through 3.37… CVSS 3.1HIGH 7.5
- TI-2008-04861 syslog-ng does not call chdir when it calls chroot, which might allow attackers to escape… CVSS 2.0HIGH 9.3
- TI-2002-01161 Balabit Syslog-NG 1.4.x before 1.4.15, and 1.5.x before 1.5.20, when using template… CVSS 2.0HIGH 7.5
- TI-2020-06489 syslog-ng: Local privilege escalation from new to root in %post CVSS 3.1HIGH 7.8
- TI-2011-00296 Balabit syslog-ng 2.0, 3.0, 3.1, 3.2 OSE and PE, when running on FreeBSD or HP-UX, does… CVSS 2.0MEDIUM 6.9
Sources
- CVE-2011-1951 · CVE Program
- CVE-2011-1951 · NVD
- FIRST EPSS
- GHSA-7jqv-hh4c-ww3h · GitHub Advisory Database · CC BY 4.0
- CVE-2011-1951 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences