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CVE-2009-0773

26
FAUCET Score

CVE-2009-0773 is a critical vulnerability affecting the JavaScript engine in Mozilla Firefox before 3.0.7, Thunderbird before 2.0.0.21, and SeaMonkey 1.1.15. It allows remote attackers to cause a denial of service (crash) and potentially execute arbitrary code through multiple vectors, including memory corruption, assertion failures, segmentation faults, and application hangs. With a CVSS score of 10.0, this vulnerability is highly severe, indicating a network-based attack with low complexity, requiring no authentication, and leading to complete compromise of confidentiality, integrity, and availability. Despite its severity, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

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

10.0HIGH

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

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

Exploit Intelligence

EPSS Score
5.79%
Probability of exploitation in next 30 days
EPSS Percentile
92.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0579 is in the 87th percentile among its peer group of 51,551 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 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 (4)

mozillapatch availablevia nvd_reference
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 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-2009-0773Critical

Firefox 3 crashes in the JavaScript engine

Mar 4, 2009

References

lists.opensuse.org / opensuse-security-announce/2009-03/msg00002.html
bugzilla.mozilla.org / show_bug.cgi
Exploit
bugzilla.mozilla.org / show_bug.cgi
Exploit
bugzilla.mozilla.org / show_bug.cgi
Patch
secunia.com / advisories/34140
secunia.com / advisories/34145
secunia.com / advisories/34272
secunia.com / advisories/34383
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%3A10491
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5856
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5980
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6141
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6708
support.avaya.com / elmodocs2/security/ASA-2009-069.htm
support.avaya.com / japple/css/japple
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
Vendor Advisory
redhat.com / support/errata/RHSA-2009-0315.html
securityfocus.com / bid/33990
securitytracker.com / id
vupen.com / english/advisories/2009/0632