neon heap-based buffer overflow

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200405-13 / neon
Release Date	May 20, 2004
Latest Revision	May 20, 2004: 01
Impact	normal
Exploitable	remote

Package	Vulnerable versions	Unaffected versions	Architecture(s)
net-misc/neon	<= 0.24.5	>= 0.24.6	All supported architectures

Related bugreports: #51490

Synopsis

A vulnerability potentially allowing remote execution of arbitrary code has been discovered in the neon library.

2. Impact Information

Background

neon provides an HTTP and WebDAV client library.

Description

Stefan Esser discovered a vulnerability in the code of the neon library : if a malicious date string is passed to the ne_rfc1036_parse() function, it can trigger a string overflow into static heap variables.

Impact

Depending on the application linked against libneon and when connected to a malicious WebDAV server, this vulnerability could allow execution of arbitrary code with the rights of the user running that application.

3. Resolution Information

Workaround

There is no known workaround at this time. All users are advised to upgrade to the latest available version of neon.

Resolution

All users of neon should upgrade to the latest stable version:

Code Listing 3.1: Resolution

# emerge sync
# emerge -pv ">=net-misc/neon-0.24.6"
# emerge ">=net-misc/neon-0.24.6"

4. References

Page updated May 20, 2004

Summary: This is a Gentoo Linux Security Advisory

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