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CVE-2009-0774

24
FAUCET Score

CVE-2009-0774 describes a denial-of-service vulnerability in the layout engine of Mozilla Firefox, Thunderbird, and SeaMonkey, which could also lead to arbitrary code execution. With a CVSS score of 9.3 (Critical), it presents a high-risk attack vector over the network with medium complexity, allowing for complete compromise of confidentiality, integrity, and availability. Despite its severity, there is no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage. This suggests it is not a widely targeted vulnerability in the wild.

Impacted Technologies

VendorProductVersion(s)CPE
<= 3.0.6CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
1.0CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:1.0:*:*:*:*:*:*:*
1.0.1CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:1.0.1:*:*:*:*:*:*:*
1.0.2CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:1.0.2:*:*:*:*:*:*:*
1.0.3CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:1.0.3:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

9.3HIGH

AV:N/AC:M/Au:N/C:C/I:C/A:C

Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
10.0
CvssVersion
2.0

Exploit Intelligence

EPSS Score
4.05%
Probability of exploitation in next 30 days
EPSS Percentile
89.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0405 is in the 53rd percentile among its peer group of 8,920 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (8)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 2.1Fixed in: seamonkey-0:1.0.9-0.30.el2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 3Fixed in: seamonkey-0:1.0.9-0.34.el3
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: thunderbird-0:1.5.0.12-19.el4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: firefox-0:3.0.7-1.el4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: seamonkey-0:1.0.9-38.el4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: thunderbird-0:2.0.0.21-1.el5
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: firefox-0:3.0.7-1.el5
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: xulrunner-0:1.9.0.7-1.el5
View patch

Vendor Advisories (1)

redhatCVE-2009-0774Critical

Firefox 2 and 3 crashes in the JavaScript engine

Mar 4, 2009

References

lists.opensuse.org / opensuse-security-announce/2009-03/msg00002.html
lists.opensuse.org / opensuse-security-announce/2009-04/msg00009.html
bugzilla.mozilla.org / show_bug.cgi
secunia.com / advisories/34137
secunia.com / advisories/34140
secunia.com / advisories/34145
secunia.com / advisories/34272
secunia.com / advisories/34324
secunia.com / advisories/34383
secunia.com / advisories/34387
secunia.com / advisories/34417
secunia.com / advisories/34462
secunia.com / advisories/34464
secunia.com / advisories/34527
slackware.com / security/viewer.php
slackware.com / security/viewer.php
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11138
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5947
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6057
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6121
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6945
support.avaya.com / elmodocs2/security/ASA-2009-069.htm
support.avaya.com / japple/css/japple
usn.ubuntu.com / 741-1
redhat.com / archives/fedora-package-announce/2009-March/msg00769.html
redhat.com / archives/fedora-package-announce/2009-March/msg00771.html
redhat.com / archives/fedora-package-announce/2009-March/msg01077.html
debian.org / security/2009/dsa-1751
debian.org / security/2009/dsa-1830
mandriva.com / security/advisories
mandriva.com / security/advisories
mozilla.org / security/announce/2009/mfsa2009-07.html
redhat.com / support/errata/RHSA-2009-0258.html
redhat.com / support/errata/RHSA-2009-0315.html
redhat.com / support/errata/RHSA-2009-0325.html
securityfocus.com / bid/33990
securitytracker.com / id
vupen.com / english/advisories/2009/0632