SB2012102802 - Fedora EPEL 6 update for exim

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Main Vulnerability Database SB2012102802

SB2012102802 - Fedora EPEL 6 update for exim

Published: October 28, 2012 Updated: April 24, 2025

Security Bulletin ID SB2012102802
CSH Severity
High
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

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

Description

This security bulletin contains information about 2 vulnerabilities.


1) Input validation error (CVE-ID: CVE-2011-1407)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green


The vulnerability allows a remote non-authenticated attacker to read and manipulate data.

The DKIM implementation in Exim 4.7x before 4.76 permits matching for DKIM identities to apply to lookup items, instead of only strings, which allows remote attackers to execute arbitrary code or access a filesystem via a crafted identity.


2) Use of externally-controlled format string (CVE-ID: CVE-2011-1764)

CWE-ID: CWE-134 - Use of Externally-Controlled Format String

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber


The vulnerability allows a remote attacker to cause DoS condition or execute arbitrary code on the target system.

The weakness exists in the dkim_exim_verify_finish function in src/dkim.c due to use of externally-controlled format string. A remote attacker can cause the service to crash or execute arbitrary code via format string specifiers in data used in DKIM logging, as demonstrated by an identity field containing a % (percent) character.

Successful exploitation of the vulnerability may result in system compromise.

Remediation

Install update from vendor's website.

References