Exploit/Advisories

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Gentoo Linux Security Advisory GLSA 202007-62
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https://security.gentoo.org/
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Severity: Normal
Title: PyCrypto: Weak key generation
Date: July 31, 2020
Bugs: #703682
ID: 202007-62

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Synopsis
=======
A flaw in PyCrypto allow remote attackers to obtain sensitive
information.

Background
=========
PyCrypto is the Python Cryptography Toolkit.

Affected packages
================
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 dev-python/pycrypto < = 2.6.1-r2 Vulnerable!
-------------------------------------------------------------------
NOTE: Certain packages are still vulnerable. Users should migrate
to another package if one is available or wait for the
existing packages to be marked stable by their
architecture maintainers.

Description
==========
It was discovered that PyCrypto incorrectly generated ElGamal key
parameters.

Impact
=====
Attackers may be able to obtain sensitive information by reading
ciphertext data.

Workaround
=========
There is no known workaround at this time.

Resolution
=========
Gentoo has discontinued support for PyCrypto. We recommend that users
unmerge PyCrypto:

# emerge --unmerge "dev-python/pycrypto"

NOTE: The Gentoo developer(s) maintaining PyCrypto have discontinued
support at this time. PyCryptodome is the canonical successor to
PyCrypto.

References
=========
[ 1 ] CVE-2018-6594
https://nvd.nist.gov/vuln/detail/CVE-2018-6594

Availability
===========
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

https://security.gentoo.org/glsa/202007-62

Concerns?
========
Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users' machines is of utmost
importance to us. Any security concerns should be addressed to
security@gentoo.org or alternatively, you may file a bug at
https://bugs.gentoo.org.

License
======
Copyright 2020 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.

https://creativecommons.org/licenses/by-sa/2.5

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