Out-of-Bounds Read/Write Vulnerability in Facebook Hermes Engine
CVE-2020-1912

8.1HIGH

Key Information:

Vendor

Facebook

Status
Hermes
Vendor
CVE Published:
9 September 2020

What is CVE-2020-1912?

The vulnerability in Facebook's Hermes JavaScript engine arises from an improper handling of inner generator functions which leads to out-of-bounds read and write operations. Attackers can exploit this weakness by executing crafted JavaScript code, potentially allowing for arbitrary code execution. This risk is primarily a concern for applications that evaluate untrusted JavaScript, making most React Native applications unaffected by this flaw.

Affected Version(s)

Hermes commit prior to 091835377369c8fd5917d9b87acffa721ad2a168

References

https://www.facebook.com/security/advisories/cve-2020-1912
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https://github.com/facebook/hermes/commit/091835377369c8f...
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CVSS V3.1

Score:
8.1
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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CVE-2020-1912 : Out-of-Bounds Read/Write Vulnerability in Facebook Hermes Engine