Bug 1712749 (CVE-2019-9821) - CVE-2019-9821 firefox: use-after-free in AssertWorkerThread leading to crash
Summary: CVE-2019-9821 firefox: use-after-free in AssertWorkerThread leading to crash
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2019-9821
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1712750
Blocks: 1712751
TreeView+ depends on / blocked
 
Reported: 2019-05-22 08:00 UTC by Marian Rehak
Modified: 2021-02-26 06:19 UTC (History)
11 users (show)

Fixed In Version: firefox 67
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Clone Of:
Environment:
Last Closed: 2019-05-24 05:33:06 UTC
Embargoed:

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Description Marian Rehak 2019-05-22 08:00:31 UTC 
A use-after-free vulnerability can occur in AssertWorkerThread due to a race condition with shared workers. This results in a potentially exploitable crash.
Comment 1 Marian Rehak 2019-05-22 08:00:42 UTC 
Created firefox tracking bugs for this issue:

Affects: fedora-all [bug 1712750]
Comment 2 Marian Rehak 2019-05-22 08:22:02 UTC 
External References:

https://www.mozilla.org/en-US/security/advisories/mfsa2019-13/#CVE-2019-9821
Comment 3 Huzaifa S. Sidhpurwala 2019-05-24 05:33:06 UTC 
Does not seem to affect the version of firefox shipped in Red Hat Enterprise Linux 6, 7 and 8 i.e. firefox 60.7 ESR.
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