SB2023021348 - Resource management error in Python
Published: February 13, 2023 Updated: June 3, 2025
Security Bulletin ID
SB2023021348
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Resource management error (CVE-ID: CVE-2013-2099)
The vulnerability allows a remote non-authenticated attacker to perform service disruption.
Algorithmic complexity vulnerability in the ssl.match_hostname function in Python 3.2.x, 3.3.x, and earlier, and unspecified versions of python-backports-ssl_match_hostname as used for older Python versions, allows remote attackers to cause a denial of service (CPU consumption) via multiple wildcard characters in the common name in a certificate.
Remediation
Install update from vendor's website.
References
- http://secunia.com/advisories/55116
- http://secunia.com/advisories/55107
- https://bugzilla.redhat.com/show_bug.cgi?id=963260
- http://www.ubuntu.com/usn/USN-1983-1
- http://www.ubuntu.com/usn/USN-1985-1
- http://bugs.python.org/issue17980
- http://www.openwall.com/lists/oss-security/2013/05/16/6
- http://www.ubuntu.com/usn/USN-1984-1
- http://rhn.redhat.com/errata/RHSA-2014-1690.html
- https://access.redhat.com/errata/RHSA-2016:1166