CVE-2009-2939 json
The postfix.postinst script in the Debian GNU/Linux and Ubuntu postfix 2.5.5 package grants the postfix user write access to /var/spool/pos…
published 2009-09-21 17 y ago modified 2026-06-16 4 mo ago also EUVD-2009-2927
- cvss
- 6.9
- version 2.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 42%
- public exploits
- 0
- none known
Summary
The postfix.postinst script in the Debian GNU/Linux and Ubuntu postfix 2.5.5 package grants the postfix user write access to /var/spool/postfix/pid, which might allow local users to conduct symlink attacks that overwrite arbitrary files.
Patch / fix
- postfix Debian 14, Debian 13, Debian 12 2.6.5-3
debian advisories DEBIAN-CVE-2009-2939
Exploit prediction
0.50% chance of exploitation in the next 30 days, higher than 42% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- openwall.com http://www.openwall.com/lists/oss-security/2009/09/18/6 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 2.0 | 6.9 | AV:L/AC:M/Au:N/C:C/I:C/A:C |
Classification
- Weakness
-
- CWE-59 Improper Link Resolution Before File Access
References
-
openwall.com
/lists/oss-security/2009/09/18/6
mailing-list, exploit
-
debian.org
/security/2011/dsa-2233
vendor-advisory
Sources
- CVE List CVE-2009-2939
- NVD CVE-2009-2939
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.