MoinMoin: Group ACL bypass

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200407-09 / MoinMoin
Release Date	July 11, 2004
Latest Revision	May 22, 2006: 02
Impact	normal
Exploitable	remote

Package	Vulnerable versions	Unaffected versions	Architecture(s)
www-apps/moinmoin	<= 1.2.1	>= 1.2.2	All supported architectures

Related bugreports: #53126

Synopsis

MoinMoin contains a bug allowing a user to bypass group ACLs (Access Control Lists).

2. Impact Information

Background

MoinMoin is a Python clone of WikiWiki, based on PikiPiki.

Description

MoinMoin contains a bug in the code handling administrative group ACLs. A user created with the same name as an administrative group gains the privileges of the administrative group.

Impact

If an administrative group called AdminGroup existed an attacker could create a user called AdminGroup and gain the privileges of the group AdminGroup. This could lead to unauthorized users gaining administrative access.

3. Resolution Information

Workaround

For every administrative group with special privileges create a user with the same name as the group.

Resolution

All users should upgrade to the latest available version of MoinMoin, as follows:

Code Listing 3.1: Resolution

# emerge sync

# emerge -pv ">=www-apps/moinmoin-1.2.2"
# emerge ">=www-apps/moinmoin-1.2.2"

4. References

Page updated July 11, 2004

Summary: This is a Gentoo Linux Security Advisory

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