Joined: 25 Feb 2003
Location: Essen, Germany
|Posted: Tue Dec 07, 2004 1:01 pm Post subject: [ GLSA 200412-05 ] mirrorselect: Insecure temporary file cre
|Gentoo Linux Security Advisory
Title: mirrorselect: Insecure temporary file creation (GLSA 200412-05)
Date: December 07, 2004
Updated: May 22, 2006
mirrorselect is vulnerable to symlink attacks, potentially allowing a local user to overwrite arbitrary files.
mirrorselect is a tool to help select distfiles mirrors for Gentoo.
Vulnerable: < 0.89
Unaffected: >= 0.89
Architectures: All supported architectures
Ervin Nemeth discovered that mirrorselect creates temporary files in world-writable directories with predictable names.
A local attacker could create symbolic links in the temporary files directory, pointing to a valid file somewhere on the filesystem. When mirrorselect is executed, this would result in the file being overwritten with the rights of the user running the utility, which could be the root user.
There is no known workaround at this time.
All mirrorselect users should upgrade to the latest version:
|# emerge --sync
# emerge --ask --oneshot --verbose ">=app-portage/mirrorselect-0.89"
Last edited by GLSA on Tue May 23, 2006 4:18 am; edited 2 times in total