PSF-2013-1

    Dashboard / Vulnerabilities / PSF-2013-1

    PSF-2013-1

    Published: 9 Oct 2013Last Modified: 9 Oct 2025
    Aliases:
    CVE-2013-2099

    Summary: ssl.match_hostname() wildcard DoS

    Details: 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.

    References: https://bugs.python.org/issue17980

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -86d53caddad11808ca332ab93ec35508b602a0dd

    Affected versions

    2.5

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    PSF-2013-1 | CVE-DB