Netscape Portable Runtime (NSPR) is susceptible to Man-in-the-Middle (MitM) attack. Dan Kaminsky discovered flaws in the way browsers such as Firefox handle NULL characters in a certificate. If an attacker is able to get a carefully-crafted certificate signed by a Certificate Authority trusted by Firefox, the attacker could use the certificate during a man-in-the-middle attack and potentially confuse Firefox into accepting it by mistake.
isc.sans.org/diary.html?storyid=7003
lists.opensuse.org/opensuse-security-announce/2009-11/msg00004.html
marc.info/?l=oss-security&m=125198917018936&w=2
osvdb.org/56723
secunia.com/advisories/36088
secunia.com/advisories/36125
secunia.com/advisories/36139
secunia.com/advisories/36157
secunia.com/advisories/36434
secunia.com/advisories/36669
secunia.com/advisories/37098
sunsolve.sun.com/search/document.do?assetkey=1-77-1021030.1-1
www.debian.org/security/2009/dsa-1874
www.mandriva.com/security/advisories?name=MDVSA-2009:197
www.mandriva.com/security/advisories?name=MDVSA-2009:216
www.mandriva.com/security/advisories?name=MDVSA-2009:217
www.mozilla.org/security/announce/2009/mfsa2009-42.html
www.novell.com/linux/security/advisories/2009_48_firefox.html
www.openldap.org/devel/cvsweb.cgi/libraries/libldap/tls_m.c.diff?r1=1.8&r2=1.11&f=h
www.redhat.com/security/updates/classification/#critical
www.redhat.com/support/errata/RHSA-2009-1207.html
www.redhat.com/support/errata/RHSA-2009-1432.html
www.securitytracker.com/id?1022632
www.ubuntu.com/usn/usn-810-1
www.vupen.com/english/advisories/2009/2085
www.vupen.com/english/advisories/2009/3184
www.wired.com/threatlevel/2009/07/kaminsky/
access.redhat.com/errata/RHSA-2009:1184
bugzilla.redhat.com/show_bug.cgi?id=510251
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10751
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A8458
usn.ubuntu.com/810-2/