Joined: 12 May 2004
|Posted: Tue Aug 30, 2005 2:50 pm Post subject: [ GLSA 200508-19 ] lm_sensors: Insecure temporary file creat
|Gentoo Linux Security Advisory
Title: lm_sensors: Insecure temporary file creation (GLSA 200508-19)
Date: August 30, 2005
lm_sensors is vulnerable to linking attacks, potentially allowing a local user to overwrite arbitrary files.
lm_sensors is a software package that provides drivers for monitoring the temperatures, voltages, and fans of Linux systems with hardware monitoring devices.
Vulnerable: < 2.9.1-r1
Unaffected: >= 2.9.1-r1
Architectures: All supported architectures
Javier Fernandez-Sanguino Pena has discovered that lm_sensors insecurely creates temporary files with predictable filenames when saving configurations.
A local attacker could create symbolic links in the temporary file directory, pointing to a valid file somewhere on the filesystem. When the pwmconfig script of lm_sensors is executed, this would result in the file being overwritten with the rights of the user running the script, which typically is the root user.
There is no known workaround at this time.
All lm_sensors users should upgrade to the latest version:
|# emerge --sync
# emerge --ask --oneshot --verbose ">=sys-apps/lm_sensors-2.9.1-r1"
Last edited by GLSA on Sun May 07, 2006 4:58 pm; edited 1 time in total