Joined: 13 Jun 2003
Location: Barcelona, Spain
|Posted: Wed Nov 03, 2004 6:11 pm Post subject: [ GLSA 200411-07 ] Proxytunnel: Format string vulnerability
|Gentoo Linux Security Advisory
Title: Proxytunnel: Format string vulnerability (GLSA 200411-07)
Date: November 03, 2004
Proxytunnel is vulnerable to a format string vulnerability, potentially allowing a remote server to execute arbitrary code with the rights of the Proxytunnel process.
Proxytunnel is a program that tunnels connections to a remote server through a standard HTTPS proxy.
Vulnerable: < 1.2.3
Unaffected: >= 1.2.3
Architectures: All supported architectures
Florian Schilhabel of the Gentoo Linux Security Audit project found a format string vulnerability in Proxytunnel. When the program is started in daemon mode (-a [port]), it improperly logs invalid proxy answers to syslog.
A malicious remote server could send specially-crafted invalid answers to exploit the format string vulnerability, potentially allowing the execution of arbitrary code on the tunnelling host with the rights of the Proxytunnel process.
You can mitigate the issue by only allowing connections to trusted remote servers.
All Proxytunnel users should upgrade to the latest version:
|# emerge --sync
# emerge --ask --oneshot --verbose ">=net-misc/proxytunnel-1.2.3"
Last edited by GLSA on Sat Aug 23, 2008 4:17 am; edited 3 times in total