Joined: 12 May 2004
|Posted: Fri Oct 07, 2005 5:23 pm Post subject: [ GLSA 200510-04 ] Texinfo: Insecure temporary file creation
|Gentoo Linux Security Advisory
Title: Texinfo: Insecure temporary file creation (GLSA 200510-04)
Date: October 05, 2005
Texinfo is vulnerable to symlink attacks, potentially allowing a local user to overwrite arbitrary files.
Texinfo is the official documentation system created by the GNU project.
Vulnerable: < 4.8-r1
Unaffected: >= 4.8-r1
Architectures: All supported architectures
Frank Lichtenheld has discovered that the "sort_offline()" function in texindex insecurely creates temporary files with predictable filenames.
A local attacker could create symbolic links in the temporary files directory, pointing to a valid file somewhere on the filesystem. When texindex is executed, this 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 Texinfo users should upgrade to the latest version:
|# emerge --sync
# emerge --ask --oneshot --verbose ">=sys-apps/texinfo-4.8-r1"
Last edited by GLSA on Sun Mar 29, 2009 4:16 am; edited 3 times in total