1. Gentoo Linux Security Advisory
| Advisory Reference | GLSA 200804-06 / unzip |
| Release Date | April 06, 2008 |
| Latest Revision | April 06, 2008: 01 |
| Impact | normal |
| Exploitable | remote |
| Package | Vulnerable versions | Unaffected versions | Architecture(s) |
| app-arch/unzip | < 5.52-r2 | >= 5.52-r2 | All supported architectures |
Related bugreports: #213761
A double free vulnerability discovered in UnZip might lead to the execution of arbitrary code.
Info-ZIP's UnZip is a tool to list and extract files inside PKZIP compressed files.
Tavis Ormandy of the Google Security Team discovered that the NEEDBITS macro in the inflate_dynamic() function in the file inflate.c can be invoked using invalid buffers, which can lead to a double free.
Remote attackers could entice a user or automated system to open a specially crafted ZIP file that might lead to the execution of arbitrary code or a Denial of Service.
There is no known workaround at this time.
All UnZip users should upgrade to the latest version:
Code Listing 3.1: Resolution |
# emerge --sync # emerge --ask --oneshot --verbose ">=app-arch/unzip-5.52-r2" |