SB2015041802 - Ubuntu update for postfix

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Main Vulnerability Database SB2015041802

SB2015041802 - Ubuntu update for postfix

Published: April 18, 2015 Updated: October 30, 2026

Security Bulletin ID SB2015041802
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

Medium 50% Low 50%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 vulnerabilities.


1) Incorrect default permissions (CVE-ID: CVE-2009-2939)

CWE-ID: CWE-276 - Incorrect Default Permissions

CVSSv4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to incorrect default permissions for /var/spool/postfix/pid set by the application. A local user with access to the system can view contents of files and directories or modify them.


2) Man-in-the-Middle (MitM) attack (CVE-ID: CVE-2011-0411)

CWE-ID: CWE-300 - Channel Accessible by Non-Endpoint ('Man-in-the-Middle')

CVSSv4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to perform MitM attack.

The vulnerability exists due to incorrect implementation of STARTTLS command that does not properly restrict I/O buffering, which allows man-in-the-middle attackers to insert commands into encrypted SMTP sessions by sending a cleartext command that is processed after TLS is in place, related to a "plaintext command injection" attack.


Remediation

Install update from vendor's website.

References