Tavis Ormandy discovered that unzip, when processing specially crafted ZIP archives, could pass invalid pointers to the C library's free routine, potentially leading to arbitrary code execution (CVE-2008-0888).
For the old stable distribution (sarge), this problem has been fixed in version 5.52-1sarge5.
For the stable distribution (etch), this problem has been fixed in version 5.52-9etch1.
The unstable distribution (sid) will be fixed soon.
We recommend that you upgrade your unzip package.
MD5 checksums of the listed files are available in the original advisory.