SB2015051001 - Ubuntu update for Exim
Published: May 10, 2015 Updated: September 28, 2019
Security Bulletin ID
SB2015051001
CSH Severity
High
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) 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.