Joined: 12 May 2004
|Posted: Tue Nov 22, 2005 10:54 pm Post subject: [ GLSA 200511-19 ] eix: Insecure temporary file creation
|Gentoo Linux Security Advisory
Title: eix: Insecure temporary file creation (GLSA 200511-19)
Date: November 22, 2005
Updated: May 22, 2006
eix has an insecure temporary file creation vulnerability, potentially allowing a local user to overwrite arbitrary files.
eix is a small utility for searching ebuilds with indexing for fast results.
Vulnerable: < 0.5.0_pre2
Unaffected: >= 0.5.0_pre2
Unaffected: >= 0.3.0-r2 < 0.3.1
Architectures: All supported architectures
Eric Romang discovered that eix creates a temporary file with a predictable name. eix creates a temporary file in /tmp/eix.*.sync where * is the process ID of the shell running eix.
A local attacker can watch the process list and determine the process ID of the shell running eix while the "emerge --sync" command is running, then create a link from the corresponding temporary file to a system file, which would result in the file being overwritten with the rights of the user running the application.
There is no known workaround at this time.
All eix users should upgrade to the latest version:
|# emerge --sync
# emerge --ask --oneshot --verbose app-portage/eix
Last edited by GLSA on Mon May 22, 2006 4:19 am; edited 2 times in total