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Message-Id: <6877F1AC-352C-49C9-BA3D-1D3944CC03F0@beckweb.net>
Date: Wed, 8 Nov 2017 11:56:57 +0100
From: Daniel Beck <ml@...kweb.net>
To: oss-security@...ts.openwall.com
Subject: Multiple vulnerabilities in Jenkins
Jenkins is an open source automation server which enables developers around
the world to reliably build, test, and deploy their software. The following
releases contain fixes for security vulnerabilities:
* Jenkins (weekly) 2.89
* Jenkins (LTS) 2.73.3
Summaries of the vulnerabilities are below. More details, severity, and
attribution can be found here:
https://jenkins.io/security/advisory/2017-11-08/
We provide advance notification for security updates on this mailing list:
https://groups.google.com/d/forum/jenkinsci-advisories
If you find security vulnerabilities in Jenkins, please report them as
described here:
https://jenkins.io/security/#reporting-vulnerabilities
---
SECURITY-499
Jenkins stores metadata related to "people", which encompasses actual user
accounts, as well as users appearing in SCM, in directories corresponding
to the user ID on disk. These directories used the user ID for their name
without additional escaping. This potentially resulted in a number of
problems, such as the following:
1. User names consisting of a single forward slash would have their user
record stored in the parent directory; deleting this user deleted all user
records.
2. User names containing character sequences such as .. could be used to
clobber other configuration files in Jenkins.
3. User names could consist of reserved names such as COM (on Windows).
SECURITY-641
Autocompletion suggestions for text fields were not escaped, resulting in a
persisted cross-site scripting vulnerability if the source for the
suggestions allowed specifying text that includes HTML metacharacters like
less-than and greater-than characters.
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