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List:       oss-security
Subject:    [oss-security] Re: Buffer overflow in pycrypto
From:       <cve-assign () mitre ! org>
Date:       2016-12-27 17:48:02
Message-ID: d17159978c3d4d89b0d67b5770c6a63b () imshyb02 ! MITRE ! ORG
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> "AES.new with invalid parameter crashes python"
> https://github.com/dlitz/pycrypto/issues/176

> AES.new(b'\000' * 16, AES.MODE_ECB, b'\000' * 540)

> Apparently this issue is fixed on pycrypto's development branch with
> commit 8dbe0dc3eea5c689d4f76b37b93fe216cf1f00d4, but this change can't
> be applied directly to the latest pycrypto release tarball; too much has
> changed.
> 
> https://github.com/dlitz/pycrypto/commit/8dbe0dc3eea5c689d4f76b37b93fe216cf1f00d4

>> Throw exception when IV is used with ECB or CTR

> src/block_templace.c
> ALGnew

> someone has used the bug to get a remote shell

> there is a heap buffer overflow on IV

> The website allows us to encrypt and decrypt messages using AES. The
> encryption is performed by cryptmsg.py, using the python library
> pycrypto.

> cgi-bin/cryptmsg.py?%s

Use CVE-2013-7459.

- -- 
CVE Assignment Team
M/S M300, 202 Burlington Road, Bedford, MA 01730 USA
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