ZNC: Directory traversal

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200909-17 / znc
Release Date	September 13, 2009
Latest Revision	September 13, 2009: 01
Impact	normal
Exploitable	remote

Package	Vulnerable versions	Unaffected versions	Architecture(s)
net-irc/znc	< 0.074	>= 0.074	All supported architectures

Related bugreports: #278684

Synopsis

A directory traversal was found in ZNC, allowing for overwriting of arbitrary files.

2. Impact Information

Background

ZNC is an advanced IRC bouncer.

Description

The vendor reported a directory traversal vulnerability when processing DCC SEND requests.

Impact

A remote, authenticated user could send a specially crafted DCC SEND request to overwrite arbitrary files with the privileges of the user running ZNC, and possibly cause the execution of arbitrary code e.g. by uploading a malicious ZNC module.

3. Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All ZNC users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=net-irc/znc-0.074"

4. References

CVE-2009-2658

Page updated September 13, 2009

Summary: This is a Gentoo Linux Security Advisory

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