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Fencer Intel
high 7.5

CVE-2014-1576 json

Heap-based buffer overflow in the nsTransformedTextRun function in Mozilla Firefox before 33.0, Firefox ESR 31.x before 31.2, and Thunderbi…

published 2014-10-15 12 y ago modified 2026-06-17 4 mo ago also EUVD-2014-1652

cvss
7.5
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
5.1%
EPSS 5.1% chance of exploitation in 30 days, percentile 92%
public exploits
0
none known

Summary

Heap-based buffer overflow in the nsTransformedTextRun function in Mozilla Firefox before 33.0, Firefox ESR 31.x before 31.2, and Thunderbird 31.x before 31.2 allows remote attackers to execute arbitrary code via Cascading Style Sheets (CSS) token sequences that trigger changes to capitalization style.

Patch / fix

  • firefox Ubuntu 14.04 LTS 33.0+build2-0ubuntu0.14.04.1
  • thunderbird Ubuntu 14.04 LTS 1:31.2.0+build2-0ubuntu0.14.04.1

ubuntu advisories UBUNTU-CVE-2014-1576

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • firefox RHEL 5 31.2.0-3.el5_11
  • firefox RHEL 6 31.2.0-3.el6_6
  • firefox RHEL 7 31.2.0-3.el7_0
  • xulrunner RHEL 7 31.2.0-1.el7_0

red hat advisories RHSA-2014:1635

  • firefox-esr openSUSE Tumbleweed 128.5.1-1.1
  • MozillaFirefox openSUSE Tumbleweed 50.1.0-1.1
  • MozillaThunderbird openSUSE Tumbleweed 45.5.1-1.1

opensuse advisories openSUSE-SU-2024:14572-1openSUSE-SU-2024:10071-1openSUSE-SU-2024:10230-1

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-2014-1576 updated cvss 5.1

Mozilla: Buffer overflow during CSS manipulation (MFSA 2014-75)

  • Red Hat Enterprise Linux 5 thunderbird Red Hat Enterprise Linux 6 thunderbird
    affected: no fix available
  • Red Hat Enterprise Linux (v. 5 server) firefox 31.2.0-3.el5_11 Red Hat Enterprise Linux Client (v. 7) firefox 31.2.0-3.el7_0, xulrunner 31.2.0-1.el7_0 Red Hat Enterprise Linux Client Optional (v. 7) firefox 31.2.0-3.el7_0 Red Hat Enterprise Linux ComputeNode Optional (v. 7) xulrunner 31.2.0-1.el7_0 Red Hat Enterprise Linux Desktop (v. 5 client) firefox 31.2.0-3.el5_11 Red Hat Enterprise Linux Desktop (v. 6) firefox 31.2.0-3.el6_6
    +10 more products
    Red Hat Enterprise Linux Desktop Optional (v. 6) firefox 31.2.0-3.el6_6 Red Hat Enterprise Linux HPC Node Optional (v. 6) firefox 31.2.0-3.el6_6 Red Hat Enterprise Linux Server (v. 6) firefox 31.2.0-3.el6_6 Red Hat Enterprise Linux Server (v. 7) firefox 31.2.0-3.el7_0, xulrunner 31.2.0-1.el7_0 Red Hat Enterprise Linux Server Optional (v. 6) firefox 31.2.0-3.el6_6 Red Hat Enterprise Linux Server Optional (v. 7) firefox 31.2.0-3.el7_0, xulrunner 31.2.0-1.el7_0 Red Hat Enterprise Linux Workstation (v. 6) firefox 31.2.0-3.el6_6 Red Hat Enterprise Linux Workstation (v. 7) firefox 31.2.0-3.el7_0, xulrunner 31.2.0-1.el7_0 Red Hat Enterprise Linux Workstation Optional (v. 6) firefox 31.2.0-3.el6_6 Red Hat Enterprise Linux Workstation Optional (v. 7) firefox 31.2.0-3.el7_0
    fixed: vendor fix RHSA-2014:1635

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

5.09% chance of exploitation in the next 30 days, higher than 92% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

Sources

Fencer Intel 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.