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Fencer Intel
medium 6.8

CVE-2015-0817 json

The asm.js implementation in Mozilla Firefox before 36.0.3, Firefox ESR 31.x before 31.5.2, and SeaMonkey before 2.33.1 does not properly d…

published 2015-03-24 11 y ago modified 2026-06-17 4 mo ago also EUVD-2015-0830

cvss
6.8
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.7%
EPSS 3.7% chance of exploitation in 30 days, percentile 89%
public exploits
0
none known

Summary

The asm.js implementation in Mozilla Firefox before 36.0.3, Firefox ESR 31.x before 31.5.2, and SeaMonkey before 2.33.1 does not properly determine the cases in which bounds checking may be safely skipped during JIT compilation and heap access, which allows remote attackers to read or write to unintended memory locations, and consequently execute arbitrary code, via crafted JavaScript.

Patch / fix

  • firefox Ubuntu 14.04 LTS 36.0.4+build1-0ubuntu0.14.04.1

ubuntu advisories UBUNTU-CVE-2015-0817

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 31.5.3-1.el5_11
  • firefox RHEL 6 31.5.3-1.el6_6
  • firefox RHEL 7 31.5.3-3.el7_1

red hat advisories RHSA-2015:0718

  • MozillaFirefox SLES for SAP 12, SLES 12, SLED 12 +1 more 31.5.3esr-27.1

suse advisories SUSE-SU-2015:0630-1

  • 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-2015-0817 updated cvss 6.8

Mozilla: Code execution through incorrect JavaScript bounds checking elimination (MFSA 2015-29)

  • Red Hat Enterprise Linux (v. 5 server) firefox 31.5.3-1.el5_11 Red Hat Enterprise Linux Client (v. 7) firefox 31.5.3-3.el7_1 Red Hat Enterprise Linux Client Optional (v. 7) firefox 31.5.3-3.el7_1 Red Hat Enterprise Linux Desktop (v. 5 client) firefox 31.5.3-1.el5_11 Red Hat Enterprise Linux Desktop (v. 6) firefox 31.5.3-1.el6_6 Red Hat Enterprise Linux Desktop Optional (v. 6) firefox 31.5.3-1.el6_6
    +9 more products
    Red Hat Enterprise Linux HPC Node Optional (v. 6) firefox 31.5.3-1.el6_6 Red Hat Enterprise Linux Server (v. 6) firefox 31.5.3-1.el6_6 Red Hat Enterprise Linux Server (v. 7) firefox 31.5.3-3.el7_1, firefox 31.5.3-3.ael7b_1 Red Hat Enterprise Linux Server Optional (v. 6) firefox 31.5.3-1.el6_6 Red Hat Enterprise Linux Server Optional (v. 7) firefox 31.5.3-3.el7_1 Red Hat Enterprise Linux Workstation (v. 6) firefox 31.5.3-1.el6_6 Red Hat Enterprise Linux Workstation (v. 7) firefox 31.5.3-3.el7_1 Red Hat Enterprise Linux Workstation Optional (v. 6) firefox 31.5.3-1.el6_6 Red Hat Enterprise Linux Workstation Optional (v. 7) firefox 31.5.3-3.el7_1
    fixed: vendor fix RHSA-2015:0718
  • Red Hat Enterprise Linux 5 thunderbird Red Hat Enterprise Linux 6 thunderbird Red Hat Enterprise Linux 7 thunderbird
    not affected: vulnerable code not present

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

3.65% chance of exploitation in the next 30 days, higher than 89% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P

Classification

Weakness

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.