Skip to content
Fencer Vulns
medium 5.0

CVE-2009-1302 json

The browser engine in Mozilla Firefox 3.x before 3.0.9, Thunderbird before 2.0.0.22, and SeaMonkey before 1.1.16 allows remote attackers to…

published 2009-04-22 17 y ago modified 2026-06-16 4 mo ago also EUVD-2009-1300

cvss
5.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.9%
EPSS 2.9% chance of exploitation in 30 days, percentile 87%
public exploits
0
none known

Summary

The browser engine in Mozilla Firefox 3.x before 3.0.9, Thunderbird before 2.0.0.22, and SeaMonkey before 1.1.16 allows remote attackers to cause a denial of service (application crash) and possibly trigger memory corruption via vectors related to (1) nsAsyncInstantiateEvent::Run, (2) nsStyleContext::Destroy, (3) nsComputedDOMStyle::GetWidth, (4) the xslt_attributeset_ImportSameName.html test case for the XSLT stylesheet compiler, (5) nsXULDocument::SynchronizeBroadcastListener, (6) IsBindingAncestor, (7) PL_DHashTableOperate and nsEditor::EndUpdateViewBatch, and (8) gfxSkipCharsIterator::SetOffsets, and other vectors.

Patch / fix

  • firefox RHEL 4 3.0.9-1.el4
  • firefox RHEL 5 3.0.9-1.el5
  • xulrunner RHEL 5 1.9.0.9-1.el5
  • xulrunner-devel-unstable RHEL 5 1.9.0.9-1.el5

red hat advisories RHSA-2009:0436

  • firefox-esr openSUSE Tumbleweed 128.5.1-1.1
  • MozillaFirefox openSUSE Tumbleweed 50.1.0-1.1

opensuse advisories openSUSE-SU-2024:14572-1openSUSE-SU-2024:10071-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2009-1302 updated cvss 6.8

Firefox 3 Layout engine crashes

  • Red Hat Enterprise Linux (v. 5 server) firefox 3.0.9-1.el5, xulrunner 1.9.0.9-1.el5, xulrunner-devel-unstable 1.9.0.9-1.el5 Red Hat Enterprise Linux AS version 4 firefox 3.0.9-1.el4 Red Hat Enterprise Linux Desktop (v. 5 client) firefox 3.0.9-1.el5, xulrunner 1.9.0.9-1.el5, xulrunner-devel-unstable 1.9.0.9-1.el5 Red Hat Enterprise Linux Desktop version 4 firefox 3.0.9-1.el4 Red Hat Enterprise Linux Desktop Workstation (v. 5 client) xulrunner 1.9.0.9-1.el5, xulrunner-devel-unstable 1.9.0.9-1.el5 Red Hat Enterprise Linux ES version 4 firefox 3.0.9-1.el4
    +1 more products
    Red Hat Enterprise Linux WS version 4 firefox 3.0.9-1.el4
    fixed: vendor fix RHSA-2009:0436

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

2.90% chance of exploitation in the next 30 days, higher than 87% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • bugzilla.mozilla.org https://bugzilla.mozilla.org/show_bug.cgi?id=454276 referenced PoC, tagged "exploit" by a source, unverified
  • bugzilla.mozilla.org https://bugzilla.mozilla.org/show_bug.cgi?id=483444 referenced PoC, tagged "exploit" by a source, unverified
  • bugzilla.mozilla.org https://bugzilla.mozilla.org/show_bug.cgi?id=432114 referenced PoC, tagged "exploit" by a source, unverified
  • bugzilla.mozilla.org https://bugzilla.mozilla.org/show_bug.cgi?id=431260 referenced PoC, tagged "exploit" by a source, unverified
  • bugzilla.mozilla.org https://bugzilla.mozilla.org/show_bug.cgi?id=467881 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Classification

Weakness
  • CWE-399 Resource Management Errors

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.