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Python 2.6.x < 2.6.9, 2.7.x < 2.7.6, 3.2.x < 3.2.6, 3.3.x < 3.3.3 SSL NULL Byte Vulnerability (bpo-18709) - Linux
Information
Severity
Severity
Family
Family
CVSSv2 Base
CVSSv2 Base
CVSSv2 Vector
CVSSv2 Vector
Solution Type
Solution Type
Created
Created
Modified
Modified
Summary
Python's SSL module fails to handle NULL bytes inside subjectAltNames general names.
Insight
Insight
The ssl.match_hostname function in the SSL module in Python does not properly handle a '0' character in a domain name in the Subject Alternative Name field of an X.509 certificate, which allows man-in-the-middle attackers to spoof arbitrary SSL servers via a crafted certificate issued by a legitimate Certification Authority.
Affected Software
Affected Software
Python 2.6 before 2.6.9, 2.7 before 2.7.6, 3.2 before 3.2.6 and 3.3 before 3.3.3.
Detection Method
Detection Method
Checks if a vulnerable version is present on the target host.
Solution
Solution
The vendor has released updates. Please see the references for more information.