Bug 1330286 (CVE-2016-2808) - CVE-2016-2808 Mozilla: Write to invalid HashMap entry through JavaScript.watch() (MFSA 2016-47)
Summary: CVE-2016-2808 Mozilla: Write to invalid HashMap entry through JavaScript.watc...
Alias: CVE-2016-2808
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
Depends On:
Blocks: 1306172
TreeView+ depends on / blocked
Reported: 2016-04-25 19:08 UTC by Siddharth Sharma
Modified: 2021-02-17 03:58 UTC (History)
3 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2016-05-09 04:52:47 UTC

Attachments (Terms of Use)

System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2016:0695 0 normal SHIPPED_LIVE Critical: firefox security update 2016-04-26 23:44:33 UTC

Description Siddharth Sharma 2016-04-25 19:08:14 UTC
The CESG, the Information Security Arm of GCHQ, reported that the JavaScript .watch() method could be used to overflow the 32-bit generation count of the underlying HashMap, resulting in a write to an invalid entry. Under the right conditions this write could lead to arbitrary code execution. The overflow takes considerable time and a malicious page would require a user to keep it open for the duration of the attack. 

External Reference:


Comment 1 Siddharth Sharma 2016-04-25 19:08:22 UTC

Name: the Mozilla project
Upstream: CESG (the Information Security Arm of GCHQ)

Comment 2 errata-xmlrpc 2016-04-26 19:45:34 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7
  Red Hat Enterprise Linux 6
  Red Hat Enterprise Linux 5

Via RHSA-2016:0695 https://rhn.redhat.com/errata/RHSA-2016-0695.html

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