The NEEDBITS macro in the inflate_dynamic function in inflate.c for unzip can be invoked using invalid buffers, which allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via unknown vectors that trigger a free of uninitialized or previously-freed data.
https://exchange.xforce.ibmcloud.com/vulnerabilities/41246
http://www.vmware.com/security/advisories/VMSA-2008-0009.html
http://www.ubuntu.com/usn/usn-589-1
http://www.redhat.com/support/errata/RHSA-2008-0196.html
http://www.debian.org/security/2008/dsa-1522
http://support.apple.com/kb/HT4077
http://security.gentoo.org/glsa/glsa-200804-06.xml
http://lists.opensuse.org/opensuse-security-announce/2008-03/msg00008.html
http://lists.apple.com/archives/security-announce/2010//Mar/msg00001.html