Speedtouch USB driver: Privilege escalation vulnerability

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200411-04 / speedtouch
Release Date	November 02, 2004
Latest Revision	November 02, 2004: 01
Impact	high
Exploitable	local

Package	Vulnerable versions	Unaffected versions	Architecture(s)
net-dialup/speedtouch	< 1.3.1	>= 1.3.1	All supported architectures

Related bugreports: #68436

Synopsis

A vulnerability in the Speedtouch USB driver can be exploited to allow local users to execute arbitrary code with escalated privileges.

2. Impact Information

Background

The speedtouch package contains a driver for the ADSL SpeedTouch USB modem.

Description

The Speedtouch USB driver contains multiple format string vulnerabilities in modem_run, pppoa2 and pppoa3. This flaw is due to an improperly made syslog() system call.

Impact

A malicious local user could exploit this vulnerability by causing a buffer overflow, and potentially allowing the execution of arbitrary code with escalated privileges.

3. Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All Speedtouch USB driver users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=net-dialup/speedtouch-1.3.1"

4. References

Page updated November 02, 2004

Summary: This is a Gentoo Linux Security Advisory

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