From:
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- ------------------------------------------------------------------------- Debian Security Advisory DSA-2763-1
[email protected] http://www.debian.org/security/ Salvatore Bonaccorso September 24, 2013
http://www.debian.org/security/faq
- -------------------------------------------------------------------------
Package : pyopenssl
Vulnerability : hostname check bypassing
Problem type : remote
Debian-specific: no
CVE ID : CVE-2013-4314
Debian Bug : 722055
It was discovered that PyOpenSSL, a Python wrapper around the OpenSSL
library, does not properly handle certificates with NULL characters in
the Subject Alternative Name field.
A remote attacker in the position to obtain a certificate for 'www.foo.org\0.example.com' from a CA that a SSL client trusts, could
use this to spoof 'www.foo.org' and conduct man-in-the-middle attacks
between the PyOpenSSL-using client and the SSL server.
For the oldstable distribution (squeeze), this problem has been fixed in version 0.10-1+squeeze1.
For the stable distribution (wheezy), this problem has been fixed in
version 0.13-2+deb7u1.
For the unstable distribution (sid), this problem has been fixed in
version 0.13-2.1.
We recommend that you upgrade your pyopenssl packages.
Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at:
http://www.debian.org/security/
Mailing list:
[email protected]
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