CVE-2009-2939 - 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

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MEDIUM

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

Published Sep 21, 2009

6.9

MEDIUM

CVSS 2.0

EPSS 0.50%

Description

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.

Affected products

Remediation

No remediation recorded yet.

Metrics

0.50% 0.00495

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 4, 2026.

EPSS probability 0.00495

Score over time

2022-2026

EPSS v2
EPSS v3
EPSS v4
EPSS v5

Percentile over time

EPSS v2
EPSS v3
EPSS v4
EPSS v5

Table of values (9 key points)

Flat stretches are collapsed. Showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 4, 2026	0.50% (0.00495)	40.34th	v5 (v2026.06.15)
Jun 15, 2026	0.50% (0.00495)	38.36th	v5 (v2026.06.15)
Mar 17, 2025	0.02% (0.00024)	3.88th	v4 (v2025.03.14)
Dec 12, 2024	0.04% (0.00042)	5.07th	v3 (v2023.03.01)
Mar 7, 2023	0.04% (0.00042)	5.63th	v3 (v2023.03.01)
Mar 6, 2023	0.89% (0.00885)	27.89th	v2 (v2022.01.01)
Sep 10, 2022	0.89% (0.00885)	26.24th	v2 (v2022.01.01)
Apr 1, 2022	0.89% (0.00885)	24.24th	v2 (v2022.01.01)
Feb 4, 2022	0.89% (0.00885)	10.50th	v2 (v2022.01.01)

Weaknesses (1)

CWE-59

References (2)

http://www.debian.org/security/2011/dsa-2233
vendor-advisoryx_refsource_DEBIAN
http://www.openwall.com/lists/oss-security/2009/09/18/6
mailing-listx_refsource_MLISTExploit

Link	Providers	Tags
http://www.debian.org/security/2011/dsa-2233		vendor-advisoryx_refsource_DEBIAN
http://www.openwall.com/lists/oss-security/2009/09/18/6		mailing-listx_refsource_MLISTExploit

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner mitre

Published Sep 21, 2009

Updated Aug 7, 2024

Reserved Aug 23, 2009

Link CVE-2009-2939

CISA Vulnrichment

Updated n/a

NVD

Status Modified

Modified Jun 16, 2026

Link CVE-2009-2939

Red Hat

Severity n/a

Public date n/a

Links CVE-2009-2939