zip: Path name buffer overflow

Background

zip is a compression and file packaging utility.

Description

zip does not check the resulting path length when doing recursive folder compression.

Impact

An attacker could exploit this by enticing another user or web application to create an archive including a specially-crafted path name, potentially resulting in the execution of arbitrary code with the permissions of the user running zip.

Workaround

There is no known workaround at this time.

Resolution

All zip users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=app-arch/zip-2.3-r4"