CVE-2015-0817

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

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Severity

Critical

Red Hat Product Security

6.8

CVSS 2.0

Review impact separately from score.

Published · March 21, 2015

Updated · November 21, 2025

Description

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.

Statement

This issue does not affect the version of thunderbird package as shipped with Red Hat Enterprise Linux 5, 6 and 7.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 2.0 · 6.8
AV:N/AC:M/Au:N/C:P/I:P/A:P

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