Bug 1265775 - (CVE-2015-4516) CVE-2015-4516 Mozilla: JavaScript immutable property enforcement can be bypassed (MFSA 2015-109)
CVE-2015-4516 Mozilla: JavaScript immutable property enforcement can be bypas...
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
All Linux
high Severity high
: ---
: ---
Assigned To: Red Hat Product Security
: Security
Depends On:
Blocks: 1261782
  Show dependency treegraph
Reported: 2015-09-23 13:47 EDT by Prasad J Pandit
Modified: 2015-09-24 12:42 EDT (History)
4 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
Last Closed: 2015-09-24 12:31:33 EDT
Type: ---
Regression: ---
Mount Type: ---
Documentation: ---
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Attachments (Terms of Use)

  None (edit)
Description Prasad J Pandit 2015-09-23 13:47:20 EDT
Mozilla developer Jeff Walden reported that in Gecko's implementation of
ECMAScript 5 API's enforces non-configurable properties with logic specific to
each API.  Scripts that do not go through these APIs can bypass these
protections and make changes to the immutable properties in violation of
security protections. This could potentially allow for web content to run in a
privileged context leading to arbitrary code execution.

External Reference:

Comment 1 Martin Prpič 2015-09-24 08:37:13 EDT

Red Hat would like to thank the Mozilla project for reporting this issue. Upstream acknowledges Jeff Walden as the original reporter.
Comment 2 Martin Prpič 2015-09-24 12:31:33 EDT
This issue was fixed in Firefox version 41.

Note You need to log in before you can comment on or make changes to this bug.