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Vulnerability record · CVE-2013-7459 · published 15 February 2017

CVE-2013-7459: Dlitz pycrypto memory buffer overflow vulnerability

Dlitz · Pycrypto

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.

9.8 CVSS 3.0 Critical EPSS 9.6% · top 4.7% CWE-119 · Memory buffer overflow
9.8CVSS 3.0 base score, v2 7.5
9.6%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
18References, 2 tagged exploit
17 Jun 2026Last modified by NVD

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.

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.openwall.com/lists/oss-security/2016/12/27/8 Mailing ListThird Party Advisory
http://www.securityfocus.com/bid/95122 Third Party AdvisoryVDB Entry
https://bugzilla.redhat.com/show_bug.cgi?id=1409754 Issue TrackingThird Party AdvisoryVDB Entry
https://github.com/dlitz/pycrypto/commit/8dbe0dc3eea5c689d4f76b37b93fe216cf1f00d4 Patch
https://github.com/dlitz/pycrypto/issues/176 PatchVendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/C6BWNADPLKDBBQBUT3P75W7
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RJ37R2YLX56YZABFNAOWV4V
https://pony7.fr/ctf:public:32c3:cryptmsg ExploitTechnical DescriptionThird Party Advisory
https://security.gentoo.org/glsa/201702-14
http://www.openwall.com/lists/oss-security/2016/12/27/8 Mailing ListThird Party Advisory
http://www.securityfocus.com/bid/95122 Third Party AdvisoryVDB Entry
https://bugzilla.redhat.com/show_bug.cgi?id=1409754 Issue TrackingThird Party AdvisoryVDB Entry
https://github.com/dlitz/pycrypto/commit/8dbe0dc3eea5c689d4f76b37b93fe216cf1f00d4 Patch
https://github.com/dlitz/pycrypto/issues/176 PatchVendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/C6BWNADPLKDBBQBUT3P75W7
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RJ37R2YLX56YZABFNAOWV4V
https://pony7.fr/ctf:public:32c3:cryptmsg ExploitTechnical DescriptionThird Party Advisory
https://security.gentoo.org/glsa/201702-14

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Source: NIST National Vulnerability Database (record CVE-2013-7459), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.