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CVE-2009-0356

16
FAUCET Score

CVE-2009-0356 describes a vulnerability in Mozilla Firefox before 3.0.6 and SeaMonkey that allows user-assisted remote attackers to bypass the Same Origin Policy. This is achieved by crafting .desktop files with links to "about:plugins" or "about:config" URIs, enabling arbitrary code execution with chrome privileges. The vulnerability has a CVSS score of 5.1 (medium severity), indicating a network-based attack with high attack complexity, leading to partial confidentiality, integrity, and availability impacts. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 3.0.5CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
0.1CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:0.1:*:*:*:*:*:*:*
0.2CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:0.2:*:*:*:*:*:*:*
0.3CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:0.3:*:*:*:*:*:*:*
0.4CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:0.4:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.1MEDIUM

AV:N/AC:H/Au:N/C:P/I:P/A:P

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
HIGH
Authentication
NONE
Exploitability Score
4.9
Impact Score
6.4
CvssVersion
2.0

Exploit Intelligence

EPSS Score
3.23%
Probability of exploitation in next 30 days
EPSS Percentile
86.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0323 is in the 81st percentile among its peer group of 19,958 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, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

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

Remediation

Patch Available

Vendor Patches (6)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: firefox-0:3.0.6-1.el4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: nss-0:3.12.2.0-3.el4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: firefox-0:3.0.6-1.el5
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: nss-0:3.12.2.0-4.el5
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: xulrunner-0:1.9.0.6-1.el5
View patch
mozillavendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2009-0356Moderate

Firefox Chrome privilege escalation via local .desktop files

Feb 3, 2009

References

lists.opensuse.org / opensuse-security-announce/2009-02/msg00001.html
rhn.redhat.com / errata/RHSA-2009-0256.html
bugzilla.mozilla.org / show_bug.cgi
secunia.com / advisories/33799
secunia.com / advisories/33809
secunia.com / advisories/33831
secunia.com / advisories/33841
secunia.com / advisories/33846
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9922
support.avaya.com / elmodocs2/security/ASA-2009-040.htm
redhat.com / archives/fedora-package-announce/2009-February/msg00240.html
mandriva.com / security/advisories
mozilla.org / security/announce/2009/mfsa2009-04.html
Vendor Advisory
securityfocus.com / bid/33598
securitytracker.com / id
vupen.com / english/advisories/2009/0313