SB2013030202 - Amazon Linux AMI update for pam

CSH
CYBERSECURITY HELP
Sign In REGISTER

Main Vulnerability Database SB2013030202

SB2013030202 - Amazon Linux AMI update for pam

Published: March 2, 2013 Updated: May 9, 2023

Security Bulletin ID SB2013030202
Severity
Medium
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Local access
Highest impact Code execution

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 secuirty vulnerabilities.


1) Stack-based buffer overflow (CVE-ID: CVE-2011-3148)

The vulnerability allows a local user to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error within the _assemble_line() function in modules/pam_env/pam_env.c when processing a long string of white spaces at the beginning of the ~/.pam_environment file. A local user can trigger a stack-based buffer overflow and execute arbitrary code on the target system.


2) Buffer overflow (CVE-ID: CVE-2011-3149)

The vulnerability allows a local user to perform service disruption.

The _expand_arg function in the pam_env module (modules/pam_env/pam_env.c) in Linux-PAM (aka pam) before 1.1.5 does not properly handle when environment variable expansion can overflow, which allows local users to cause a denial of service (CPU consumption).


Remediation

Install update from vendor's website.

References