Apache mod_tcl set_var() format string
| modtcl-setvar-format-string (29550) |  High Risk |
Description:
The mod_tcl Apache Web server module could allow a remote attacker to execute arbitrary commands on the system, caused by a format string vulnerability in the set_var() function. An attacker could exploit this vulnerability by sending a specially-crafted format string to a script using the set_var() function which could allow the attacker to execute arbitrary commands on the vulnerable system with the privileges of the Web server service.
Platforms Affected:
- Gentoo, Linux
- Tcl Developer Exchange, mod_tcl 1.0
Remedy:
Upgrade to the latest version of mod_tcl (1.0.1 or later), available from the Apache mod_tcl Web site. See References.
For Gentoo Linux:
Refer to Gentoo Linux Security Announcement GLSA 200610-12 for patch, upgrade, or suggested workaround information. See References.
Consequences:
Gain Access
References:
- iDefense Labs PUBLIC ADVISORY: 10.13.06, Apache HTTP Server mod_tcl set_var Format String Vulnerability at http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=421.
- mod_tcl Web page, mod_tcl - Apache Web Server Module at http://tcl.apache.org/mod_tcl/.
- mod_tcl Web site, mod_tcl - Apache Web Server Module at http://tcl.apache.org/mod_tcl/.
- BID-20527: Apache Mod_TCL Remote Format String Vulnerability
- CVE-2006-4154: Format string vulnerability in the mod_tcl module 1.0 for Apache 2.x allows context-dependent attackers to execute arbitrary code via format string specifiers that are not properly handled in a set_var function call in (1) tcl_cmds.c and (2) tcl_core.c.
- GLSA-200610-12: Apache mod_tcl: Format string vulnerability
- OSVDB ID: 29536: Apache Tcl mod_tcl set_var Function Remote Format String
- SA22458: Apache HTTP Server mod_tcl Format String Vulnerabilities
- SECTRACK ID: 1017062: Apache mod_tcl Format String Bug in set_var() Function May Let Remote Users Execute Arbitrary Code
- US-CERT VU#366020: Apache mod_tcl module contains a format string error
- VUPEN/ADV-2006-4033: Mod_tcl Module for Apache HTTP Server Remote Format String Vulnerability
Reported:
Oct 13, 2006
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