CVE-2013-2099
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…
Does this matter?
Lower severity and a low EPSS score (4.67%). Track it; it rarely justifies an emergency change on its own.
Description
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.
- CVSS 2.0
- 4.3 MEDIUMAV:N/AC:M/Au:N/C:N/I:N/A:P
- EPSS
- 4.67% probability · 91th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-399
- Affected
- python/python · canonical/ubuntu linux
- Source
- secalert@redhat.com
References
- http://bugs.python.org/issue17980Patch
- http://rhn.redhat.com/errata/RHSA-2014-1690.html
- http://secunia.com/advisories/55107Vendor Advisory
- http://secunia.com/advisories/55116Vendor Advisory
- http://www.openwall.com/lists/oss-security/2013/05/16/6
- http://www.ubuntu.com/usn/USN-1983-1
- http://www.ubuntu.com/usn/USN-1984-1
- http://www.ubuntu.com/usn/USN-1985-1
- https://access.redhat.com/errata/RHSA-2016:1166
- https://bugzilla.redhat.com/show_bug.cgi?id=963260
- http://bugs.python.org/issue17980Patch
- http://rhn.redhat.com/errata/RHSA-2014-1690.html
- http://secunia.com/advisories/55107Vendor Advisory
- http://secunia.com/advisories/55116Vendor Advisory
- http://www.openwall.com/lists/oss-security/2013/05/16/6
- http://www.ubuntu.com/usn/USN-1983-1
- http://www.ubuntu.com/usn/USN-1984-1
- http://www.ubuntu.com/usn/USN-1985-1
- https://access.redhat.com/errata/RHSA-2016:1166
- https://bugzilla.redhat.com/show_bug.cgi?id=963260
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.