Bug 1576262 – CVE-2018-5163 Mozilla: Replacing cached data in JavaScript Start-up Bytecode Cache

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Bug 1576262 - (CVE-2018-5163) CVE-2018-5163 Mozilla: Replacing cached data in JavaScript Start-up Bytecode Cache

Summary:	CVE-2018-5163 Mozilla: Replacing cached data in JavaScript Start-up Bytecode ...

Status:	NEW

Aliases:	CVE-2018-5163

Product:	Security Response
Classification:	Other
Component:	vulnerability (Show other bugs)
Sub Component:
Version:	unspecified
Hardware:	All Linux

Priority	medium Severity medium
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Assigned To:	Red Hat Product Security
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Whiteboard:	impact=moderate,public=20180509,repor...
Keywords:	Security

Depends On:
Blocks:	1573375
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Reported:	2018-05-09 03:13 EDT by Doran Moppert
Modified:	2018-05-24 01:17 EDT (History)
CC List:	5 users (show)

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Description Doran Moppert 2018-05-09 03:13:20 EDT

If a malicious attacker has used another vulnerability to gain full control over a content process, they may be able to replace the alternate data resources stored in the JavaScript Start-up Bytecode Cache (JSBC) for other JavaScript code. If the parent process then runs this replaced code, the executed script would be run with the parent process' privileges, escaping the sandbox on content processes.



External Reference:

https://www.mozilla.org/en-US/security/advisories/mfsa2018-11/#CVE-2018-5163

Comment 1 Doran Moppert 2018-05-09 03:13:25 EDT

Acknowledgments:

Name: the Mozilla project
Upstream: Nicolas B, Pierron

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