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CVE-2009-2408

MEDIUMCVSS 5.9/10EPSS 5.74%

Last modified

CVE-2009-2408 is a medium-severity vulnerability rated 5.9/10 on the CVSS scale. 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.. EPSS estimates a 5.74% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1
5.9/10

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

EPSS Probability
5.74%

92.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
MozillaFirefox< 3.0.13
MozillaNetwork Security Services< 3.12.3
MozillaSeamonkey< 1.1.18
MozillaThunderbird< 2.0.0.23
OpensuseOpensuse>= 10.3, <= 11.1
SuseLinux Enterprise10.0
SuseLinux Enterprise11.0
SuseLinux Enterprise Server9
DebianDebian Linux5.0
CanonicalUbuntu Linux8.04
CanonicalUbuntu Linux8.10
CanonicalUbuntu Linux9.04

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2009-2408?
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.
How severe is CVE-2009-2408?
CVE-2009-2408 has a CVSS score of 5.9/10 (MEDIUM severity). The EPSS model estimates a 5.74% probability of exploitation in the next 30 days.
How do I fix CVE-2009-2408?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST