CVE-2009-3984

Severity: medium (CVSS 6.8 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2009-12-17 · updated 2026-06-16

Description

Mozilla Firefox before 3.0.16 and 3.5.x before 3.5.6, and SeaMonkey before 2.0.1, allows remote attackers to spoof an SSL indicator for an http URL or a file URL by setting document.location to an https URL corresponding to a site that responds with a No Content (aka 204) status code and an empty body.

Affected products

Mozilla Firefox: through 3.0.15; 0.1, 0.2, 0.3, 0.4, 0.5, 0.6 (+103)
Mozilla Seamonkey: through 2.0; 1.0, 1.0-alpha, 1.0-beta, 1.0.1, 1.0.2, 1.0.3 (+39)
Mozilla Thunderbird: all versions

References

http://secunia.com/advisories/37699
http://secunia.com/advisories/37703
http://secunia.com/advisories/37704
http://secunia.com/advisories/37785
http://secunia.com/advisories/37813
http://secunia.com/advisories/37856
http://secunia.com/advisories/37881
http://securitytracker.com/id?1023342
http://securitytracker.com/id?1023343
http://www.debian.org/security/2009/dsa-1956
http://www.mozilla.org/security/announce/2009/mfsa2009-69.html
http://www.novell.com/linux/security/advisories/2009_63_firefox.html

Get alerted when CVE-2009-3984 or the next vulnerability affects your stack