Links: Arbitrary Samba command execution

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200612-16 / links
Release Date	December 14, 2006
Latest Revision	December 14, 2006: 01
Impact	normal
Exploitable	remote

Package	Vulnerable versions	Unaffected versions	Architecture(s)
www-client/links	< 2.1_pre26	>= 2.1_pre26	All supported architectures

Related bugreports: #157028

Synopsis

Links does not properly validate "smb://" URLs, making it vulnerable to the execution of arbitrary Samba commands.

2. Impact Information

Background

Links is a web browser running in both graphics and text modes.

Description

Teemu Salmela discovered that Links does not properly validate "smb://" URLs when it runs smbclient commands.

Impact

A remote attacker could entice a user to browse to a specially crafted "smb://" URL and execute arbitrary Samba commands, which would allow the overwriting of arbitrary local files or the upload or the download of arbitrary files. This vulnerability can be exploited only if "smbclient" is installed on the victim's computer, which is provided by the "samba" Gentoo package.

3. Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All Links users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=www-client/links-2.1_pre26"

4. References

CVE-2006-5925

Updated December 14, 2006

Summary: This is a Gentoo Linux Security Advisory

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