GLSA-200411-22 : Davfs2, lvm-user: Insecure tempfile handling
Low Nessus Plugin ID 15723
SynopsisThe remote Gentoo host is missing one or more security-related patches.
DescriptionThe remote host is affected by the vulnerability described in GLSA-200411-22 (Davfs2, lvm-user: Insecure tempfile handling)
Florian Schilhabel from the Gentoo Linux Security Audit Team found that Davfs2 insecurely created .pid files in /tmp. Furthermore, Trustix Secure Linux found that the lvmcreate_initrd script, included in the lvm-user Gentoo package, also creates temporary files in world-writeable 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 Davfs2 or lvmcreate_initrd is called, this would result in the file being overwritten with the rights of the user running the software, which could be the root user.
There is no known workaround at this time.
SolutionAll Davfs2 users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose '>=net-fs/davfs2-0.2.2-r1' All lvm-user users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose '>=sys-fs/lvm-user-1.0.7-r2'