PSF-2013-2

vendorUSosv

ssl: NULL in subjectAltNames

view advisory published 2013-08-18Licence: per source

The ssl.match_hostname function in the SSL module in Python 2.6 through 3.4 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, a related issue to CVE-2009-2408.

describes (1)

Related CVEs.

ID	severity	EPSS	exploitable	published
CVE-2013-4238US	medium4.3	5.35% (93rd)	—	2013-08-18
The ssl.match_hostname function in the SSL module in Python 2.6 through 3.4 does not properly handle a '\0' character in a domain name in the Subject Alternative Name field of an X…

references

External citations — patches, advisories, analysis.

https://bugs.python.org/issue18709REPORT

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