gnuserv before 3.12, as shipped with XEmacs, does not properly check the specified length…
Priority MEDIUM 51CWE-120Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- Complete · Complete · Complete
- Fix status
- Fixed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-120 and the CVSS impact.
Summary
gnuserv before 3.12, as shipped with XEmacs, does not properly check the specified length of an X Windows MIT-MAGIC-COOKIE cookie, which allows remote attackers to execute arbitrary commands via a buffer overflow, or brute force authentication by using a short cookie length.
Why it matters now
EPSS 0.05496 92nd percentileScored 2026-11-07
Fix Fixed 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:andynorman:gnuserv:*:*:*:*:*:*:*:* | before 3.12 | Vulnerable | Andynorman |
| cpe:2.3:a:gnu:xemacs:-:*:*:*:*:*:*:* | not specified by NVD | Running on | GNU |
- cpe:2.3:a:andynorman:gnuserv:*:*:*:*:*:*:*:* Versions before 3.12 Vulnerable ·Andynorman
- cpe:2.3:a:gnu:xemacs:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·GNU
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Red Hat
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Linux 7.0 | Fixed | RHSA-2001:010 |
| Red Hat Powertools 6.2 | Fixed | RHSA-2001:011 |
Timeline
- 2026-10-02 Threatist record created from CVE-2001-0191
- 2026-10-03 Alias added: GHSA-5w94-q2g4-prcg
References
Sources
- CVE-2001-0191 · CVE Program
- CVE-2001-0191 · NVD
- FIRST EPSS
- GHSA-5w94-q2g4-prcg · GitHub Advisory Database · CC BY 4.0
- CVE-2001-0191 · 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