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Bug 834542 (CVE-2022-21716) - <dev-python/twisted-22.2.0: DoS via peer SSH version identifier
Summary: <dev-python/twisted-22.2.0: DoS via peer SSH version identifier
Status: RESOLVED FIXED
Alias: CVE-2022-21716
Product: Gentoo Security
Classification: Unclassified
Component: Vulnerabilities (show other bugs)
Hardware: All Linux
: Normal minor (vote)
Assignee: Gentoo Security
URL: https://github.com/twisted/twisted/se...
Whiteboard: B3 [glsa+]
Keywords:
Depends on:
Blocks:
 
Reported: 2022-03-03 23:41 UTC by John Helmert III
Modified: 2023-01-11 05:25 UTC (History)
1 user (show)

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Package list:
Runtime testing required: ---

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Description John Helmert III archtester Gentoo Infrastructure gentoo-dev Security 2022-03-03 23:41:20 UTC 
CVE-2022-21716:

Twisted is an event-based framework for internet applications, supporting Python 3.6+. Prior to 22.2.0, Twisted SSH client and server implement is able to accept an infinite amount of data for the peer's SSH version identifier. This ends up with a buffer using all the available memory. The attach is a simple as `nc -rv localhost 22 < /dev/zero`. A patch is available in version 22.2.0. There are currently no known workarounds.

Fixed in 22.2.0.
Comment 1 John Helmert III archtester Gentoo Infrastructure gentoo-dev Security 2022-11-22 16:48:12 UTC 
GLSA request filed
Comment 2 Larry the Git Cow gentoo-dev 2023-01-11 05:23:07 UTC 
The bug has been referenced in the following commit(s):

https://gitweb.gentoo.org/data/glsa.git/commit/?id=2bcf5e2e8d41a687f63bb2d3acc767b943e61b24

commit 2bcf5e2e8d41a687f63bb2d3acc767b943e61b24
Author:     GLSAMaker <glsamaker@gentoo.org>
AuthorDate: 2023-01-11 05:16:16 +0000
Commit:     John Helmert III <ajak@gentoo.org>
CommitDate: 2023-01-11 05:22:04 +0000

    [ GLSA 202301-02 ] Twisted: Multiple Vulnerabilities
    
    Bug: https://bugs.gentoo.org/832875
    Bug: https://bugs.gentoo.org/834542
    Bug: https://bugs.gentoo.org/878499
    Signed-off-by: GLSAMaker <glsamaker@gentoo.org>
    Signed-off-by: John Helmert III <ajak@gentoo.org>

 glsa-202301-02.xml | 46 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 46 insertions(+)
Comment 3 John Helmert III archtester Gentoo Infrastructure gentoo-dev Security 2023-01-11 05:25:59 UTC 
GLSA released, all done!