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Fencer Intel
high 7.5

CVE-2015-4521 json

The ConvertDialogOptions function in Mozilla Firefox before 41.0 and Firefox ESR 38.x before 38.3 might allow remote attackers to cause a d…

published 11y ago modified 4mo ago also EUVD-2015-4541

cvss
7.5
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 ConvertDialogOptions function in Mozilla Firefox before 41.0 and Firefox ESR 38.x before 38.3 might allow remote attackers to cause a denial of service (memory corruption and application crash) or possibly have unspecified other impact via unknown vectors.

Patch / fix

  • firefox Ubuntu 14.04 LTS 41.0+build3-0ubuntu0.14.04.1
  • thunderbird Ubuntu 14.04 LTS 1:38.3.0+build1-0ubuntu0.14.04.1

ubuntu advisories UBUNTU-CVE-2015-4521

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

  • thunderbird RHEL 5 PRODUCTIVITY, RHEL 5 38.3.0-1.el5_11
  • thunderbird RHEL 6 38.3.0-1.el6_7
  • thunderbird RHEL 7 38.3.0-1.el7_1
  • thunderbird RHEL 7 38.3.0-1.ael7b_1
  • firefox RHEL 5 38.3.0-2.el5_11
  • firefox RHEL 6 38.3.0-2.el6_7
  • firefox RHEL 7 38.3.0-2.el7_1

red hat advisories RHSA-2015:1852RHSA-2015:1834

  • MozillaFirefox SLES for SAP 11 SP4, SLES for SAP 11 SP3, SLES 11 SP4 +6 more 38.3.0esr-22.1
  • mozilla-nspr SLES for SAP 12, SLES 12, SLED 12 +1 more 4.10.9-6.1
  • MozillaFirefox SLES for SAP 12, SLES 12, SLED 12 +1 more 38.3.0esr-48.1

suse advisories SUSE-SU-2015:1703-1SUSE-SU-2015:1680-1

  • MozillaFirefox openSUSE Tumbleweed 50.1.0-1.1
  • MozillaThunderbird openSUSE Tumbleweed 45.5.1-1.1

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

Is CVE-2015-4521 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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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-2015-4521 updated cvss 6.8

Mozilla: Vulnerabilities found through code inspection (MFSA 2015-112)

  • Red Hat Enterprise Linux (v. 5 server) firefox 38.3.0-2.el5_11 Red Hat Enterprise Linux Client (v. 7) firefox 38.3.0-2.el7_1, thunderbird 38.3.0-1.el7_1 Red Hat Enterprise Linux Client Optional (v. 7) firefox 38.3.0-2.el7_1 Red Hat Enterprise Linux Desktop (v. 5 client) firefox 38.3.0-2.el5_11, thunderbird 38.3.0-1.el5_11 Red Hat Enterprise Linux Desktop (v. 6) firefox 38.3.0-2.el6_7, thunderbird 38.3.0-1.el6_7 Red Hat Enterprise Linux Desktop Optional (v. 6) firefox 38.3.0-2.el6_7
    +1 more products
    Red Hat Enterprise Linux HPC Node Optional (v. 6) firefox 38.3.0-2.el6_7
    fixed: vendor fix RHSA-2015:1834
  • Red Hat Enterprise Linux Optional Productivity Applications (v. 5 server) thunderbird 38.3.0-1.el5_11
    fixed: vendor fix RHSA-2015:1852
  • Red Hat Enterprise Linux Server (v. 6) firefox 38.3.0-2.el6_7 Red Hat Enterprise Linux Server (v. 7) firefox 38.3.0-2.el7_1, firefox 38.3.0-2.ael7b_1 Red Hat Enterprise Linux Server Optional (v. 6) firefox 38.3.0-2.el6_7, thunderbird 38.3.0-1.el6_7 Red Hat Enterprise Linux Server Optional (v. 7) firefox 38.3.0-2.el7_1, thunderbird 38.3.0-1.el7_1, thunderbird 38.3.0-1.ael7b_1 Red Hat Enterprise Linux Workstation (v. 6) firefox 38.3.0-2.el6_7, thunderbird 38.3.0-1.el6_7 Red Hat Enterprise Linux Workstation (v. 7) firefox 38.3.0-2.el7_1, thunderbird 38.3.0-1.el7_1
    +2 more products
    Red Hat Enterprise Linux Workstation Optional (v. 6) firefox 38.3.0-2.el6_7 Red Hat Enterprise Linux Workstation Optional (v. 7) firefox 38.3.0-2.el7_1
    fixed: vendor fix RHSA-2015:1834

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

2.92% chance of exploitation in the next 30 days, higher than 87% 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.