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Gentoo: GLSA-200411-07 Normal: Proxytunnel Format String Issue

Proxytunnel is vulnerable to a format string vulnerability, potentially allowing a remote server to execute arbitrary code with the rights of the Proxytunnel process. [More...]. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200411-07 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - https://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: Normal Title: Proxytunnel: Format string vulnerability Date: November 03, 2004 Bugs: #69379 ID: 200411-07 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======= Proxytunnel is vulnerable to a format string vulnerability, potentially allowing a remote server to execute arbitrary code with the rights of the Proxytunnel process. Background ========= Proxytunnel is a program that tunnels connections to a remote server through a standard HTTPS proxy. Affected packages ================ ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 net-misc/proxytunnel < 1.2.3 > = 1.2.3 Description ========== 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. Impact ===== A malicious remote server could send specially-crafted invalid answersto exploit the format string vulnerability, potentially allowing the execution of arbitrary code on the tunnelling host with the rights of the Proxytunnel process. Workaround ========= You can mitigate the issue by only allowing connections to trusted remote servers. Resolution ========= All Proxytunnel users should upgradeto the latest version: # emerge --sync # emerge --ask --oneshot --verbose "> =net-misc/proxytunnel-1.2.3" References ========= [ 1 ] CAN-2004-0992 https://www.cve.org/CVERecord?id=CAN-2004-0992 [ 2 ] Proxytunnel News Availability =========== This GLSA and any updates to it are available for viewing at the Gentoo Security Website: https://security.gentoo.org/glsa/200411-07 Concerns? ======== Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to This email address is being protected from spambots. You need JavaScript enabled to view it. or alternatively, you may file a bug at https://bugs.gentoo.org/. License ====== Copyright 2004 Gentoo Foundation, Inc; referenced text belongs to its owner(s). The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license. https://creativecommons.org/licenses/by-sa/1.0/ . Proxytunnel's security flaw poses a risk of remote code execution linked to a format string issue. Upgrade promptly to the latest version to mitigate this risk. Proxytunnel, Remote Execution, Gentoo Advisory, Security Update. . LinuxSecurity.com Team

Nov 03, 2004 Gentoo