Arch Linux Security Advisory ASA-201701-26

Severity: Critical
Date : 2017-01-15
CVE-ID : CVE-2013-7459
Package : python-crypto
Type : arbitrary code execution
Remote : Yes
Link : https://security.archlinux.org/AVG-118

Summary

The package python-crypto before version 2.6.1-5 is vulnerable to
arbitrary code execution.

Resolution

Upgrade to 2.6.1-5.

pacman -Syu “python-crypto>=2.6.1-5”

The problem has been fixed upstream but no release is available yet.

Workaround

None.

Description

A heap-buffer overflow vulnerability was discovered in pycrypto leading
to arbitrary code execution. All users of pycrypto’s AES module that
allow the mode of operation to be specified by an attacker, check for
ECB explicitly and create the objects without specifying an IV are
vulnerable to this issue.

Impact

A remote attacker is able to execute arbitrary code by passing certain
parameters to the AES module.

References

https://github.com/dlitz/pycrypto/issues/176
https://github.com/dlitz/pycrypto/commit/8dbe0dc3eea5c689d4f76b37b93fe216cf1f00d4
http://seclists.org/oss-sec/2016/q4/760
https://security.archlinux.org/CVE-2013-7459