oss-security - CVE-request: monkey fails to drop supplemental groups when lowering privileges

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Message-ID: <20120920173506.GB32624@kludge.henri.nerv.fi>
Date: Thu, 20 Sep 2012 20:35:06 +0300
From: Henri Salo <henri@...v.fi>
To: oss-security@...ts.openwall.com
Cc: security@...key-project.com
Subject: CVE-request: monkey fails to drop supplemental groups when
 lowering privileges

Hello,

Please assign 2012 CVE-identifier for following monkey vulnerability:

Monkey webserver fails to drop supplemental groups when lowering privileges. This allows any local user on the system to read any fine that root's supplemental groups can access. Monkey does perform a filesystem access check to make sure that its EUID/EGID can access the target file, but this check is subject to TOCTOU flaws.

Reported by John Lightsey in http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=688007
Affected Debian-version is 0.9.3-1 (haven't tested upstream package)
Project page: http://www.monkey-project.com/

- Henri Salo

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