CVE-2013-7459

Severity: critical (CVSS 9.8 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 9.6% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2017-02-15 · updated 2026-06-17
Weakness: CWE-119

Description

Heap-based buffer overflow in the ALGnew function in block_templace.c in Python Cryptography Toolkit (aka pycrypto) allows remote attackers to execute arbitrary code as demonstrated by a crafted iv parameter to cryptmsg.py.

Affected products

Dlitz Pycrypto: through 2.6.1
Fedoraproject Fedora: 24, 25

References

http://www.openwall.com/lists/oss-security/2016/12/27/8
http://www.securityfocus.com/bid/95122
https://bugzilla.redhat.com/show_bug.cgi?id=1409754
https://github.com/dlitz/pycrypto/commit/8dbe0dc3eea5c689d4f76b37b93fe216cf1f00d4
https://github.com/dlitz/pycrypto/issues/176
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/C6BWNADPLKDBBQBUT3P75W7HAJCE7M3B/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RJ37R2YLX56YZABFNAOWV4VTHTGYREAE/
https://pony7.fr/ctf:public:32c3:cryptmsg
https://security.gentoo.org/glsa/201702-14
http://www.openwall.com/lists/oss-security/2016/12/27/8
http://www.securityfocus.com/bid/95122
https://bugzilla.redhat.com/show_bug.cgi?id=1409754

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