Bug 1889812 (CVE-2020-1914) - CVE-2020-1914 hermes: Out of bounds read in SaveGeneratorLong instruction
Summary: CVE-2020-1914 hermes: Out of bounds read in SaveGeneratorLong instruction
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2020-1914
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
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Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2020-10-20 15:55 UTC by Michael Kaplan
Modified: 2021-10-28 05:27 UTC (History)
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Last Closed: 2021-10-28 05:27:14 UTC
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Description Michael Kaplan 2020-10-20 15:55:07 UTC 
A logic vulnerability when handling the SaveGeneratorLong instruction in Facebook Hermes prior to commit b2021df620824627f5a8c96615edbd1eb7fdddfc allows attackers to potentially read out of bounds or theoretically execute arbitrary code via crafted JavaScript. Note that this is only exploitable if the application using Hermes permits evaluation of untrusted JavaScript. Hence, most React Native applications are not affected.

Reference:

https://github.com/facebook/hermes/commit/b2021df620824627f5a8c96615edbd1eb7fdddfc
https://www.facebook.com/security/advisories/cve-2020-1914
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