CVE-2009-2408

moderate-risk
Published 2009-07-30

Mozilla Network Security Services (NSS) before 3.12.3, Firefox before 3.0.13, Thunderbird before 2.0.0.23, and SeaMonkey before 1.1.18 do not properly handle a '\0' character in a domain name in the subject's Common Name (CN) field of an X.509 certificate, which allows man-in-the-middle attackers to spoof arbitrary SSL servers via a crafted certificate issued by a legitimate Certification Authority. NOTE: this was originally reported for Firefox before 3.5.

Do I need to act?

~
2.5% chance of exploitation in next 30 days
EPSS score — moderate exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.9/10 Medium
NETWORK / HIGH complexity

Affected Products (12)

Affected Vendors

Suse Opensuse Debian Canonical Mozilla

References (60)

Broken Link http://isc.sans.org/diary.html?storyid=7003
Mailing List http://lists.opensuse.org/opensuse-security-announce/2009-11/msg00004.html
Mailing List http://marc.info/?l=oss-security&m=125198917018936&w=2
Broken Link http://osvdb.org/56723
Broken Link http://secunia.com/advisories/36088
Broken Link http://secunia.com/advisories/36125
Broken Link http://secunia.com/advisories/36139
Broken Link http://secunia.com/advisories/36157
Broken Link http://secunia.com/advisories/36434
Broken Link http://secunia.com/advisories/36669
Broken Link http://secunia.com/advisories/37098
Broken Link http://sunsolve.sun.com/search/document.do?assetkey=1-77-1021030.1-1
Mailing List http://www.debian.org/security/2009/dsa-1874
Broken Link http://www.mandriva.com/security/advisories?name=MDVSA-2009:197
Broken Link http://www.mandriva.com/security/advisories?name=MDVSA-2009:216
Broken Link http://www.mandriva.com/security/advisories?name=MDVSA-2009:217
Vendor Advisory http://www.mozilla.org/security/announce/2009/mfsa2009-42.html
Broken Link http://www.novell.com/linux/security/advisories/2009_48_firefox.html
Broken Link http://www.openldap.org/devel/cvsweb.cgi/libraries/libldap/tls_m.c.diff?r1=1.8&r...
Broken Link http://www.redhat.com/support/errata/RHSA-2009-1207.html
and 40 more references
41
/ 100
moderate-risk
Severity 18/34 · Moderate
Exploitability 6/34 · Minimal
Exposure 17/34 · Moderate