ZNC: Privilege escalation

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200903-02 / znc
Release Date	March 06, 2009
Latest Revision	March 06, 2009: 01
Impact	high
Exploitable	remote

Package	Vulnerable versions	Unaffected versions	Architecture(s)
net-irc/znc	< 0.066	>= 0.066	All supported architectures

Related bugreports: #260148

Synopsis

A vulnerability in ZNC allows for privilege escalation.

2. Impact Information

Background

ZNC is an advanced IRC bouncer.

Description

cnu discovered multiple CRLF injection vulnerabilities in ZNC's webadmin module.

Impact

A remote authenticated attacker could modify the znc.conf configuration file and gain privileges via newline characters in e.g. the QuitMessage field, and possibly execute arbitrary code.

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-0.066"

4. References

CVE-2009-0759

Page updated March 06, 2009

Summary: This is a Gentoo Linux Security Advisory

Security Team
Contact Address

Donate to support our development efforts.