Vulnerability in Python
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 service (CPU consumption) via multiple wildcard characters in the common name in a certificate.
Published · last modified .
CVSS v2 metric
CVSS v2 base score 4.3 (Medium). Vector: AV:N/AC:M/Au:N/C:N/I:N/A:P. This CVE predates CVSS v3 and has no v3 score from NVD.
EPSS exploit prediction
EPSS: 0.049 (91.7th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 92nd percentile — 91.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.047 · newest: 0.049 · change: +0.002
Affected products
- Python — versions 3.2.0, 3.2.1, 3.2.2
- Canonical Ubuntu Linux — versions 12.04, 12.10, 13.04
Weakness classification (CWE)
Public proof-of-concept exploits
References
- bugzilla.redhat.com/show_bug.cgi
- www.ubuntu.com/usn/USN-1984-1 (vendor-advisory)
- secunia.com/advisories/55116 (Vendor Advisory, third-party-advisory)
- access.redhat.com/errata/RHSA-2016:1166 (vendor-advisory)
- www.ubuntu.com/usn/USN-1985-1 (vendor-advisory)
- bugs.python.org/issue17980 (Patch)
- secunia.com/advisories/55107 (Vendor Advisory, third-party-advisory)
- rhn.redhat.com/errata/RHSA-2014-1690.html (vendor-advisory)
- www.ubuntu.com/usn/USN-1983-1 (vendor-advisory)
- www.openwall.com/lists/oss-security/2013/05/16/6 (mailing-list)
Frequently asked questions
- What is CVE-2013-2099?
- CVE-2013-2099 is a vulnerability in Python, classified under CWE-399. Published 2013-10-09.
- Is CVE-2013-2099 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.