neon 0.28.0 through 0.28.2 allows remote servers to cause a denial of service (NULL pointer dereference and crash) via vectors related to Digest authentication, Digest domain parameter support, and the parse_domain function.
https://www.redhat.com/archives/fedora-package-announce/2008-October/msg00367.html
https://exchange.xforce.ibmcloud.com/vulnerabilities/44511
http://www.vupen.com/english/advisories/2008/2420
http://www.ubuntu.com/usn/usn-835-1
http://www.securitytracker.com/id?1020725
http://www.securityfocus.com/bid/30710
http://www.openwall.com/lists/oss-security/2008/08/20/5
http://www.openwall.com/lists/oss-security/2008/08/20/2
http://www.openwall.com/lists/oss-security/2008/08/15/4
http://www.mandriva.com/security/advisories?name=MDVSA-2009:074
http://secunia.com/advisories/36799
http://secunia.com/advisories/32286
http://secunia.com/advisories/31687
http://secunia.com/advisories/31508
http://lists.opensuse.org/opensuse-security-announce/2008-08/msg00006.html
http://lists.manyfish.co.uk/pipermail/neon/2008-August/000040.html
http://lists.manyfish.co.uk/pipermail/neon/2008-August/000038.html