CVE-2020-1912: facebook hermes Out-of-bounds Write

Vulnerability summary

CVE-2020-1912 is a high (CVSS 8.1) Out-of-bounds Write vulnerability in facebook hermes. EPSS estimates a 1.81% chance of exploitation in the next 30 days, higher than 78.3% of scored vulnerabilities.

Timeline

1. 09-09-2020
   PublishedVulnerability first disclosed.
2. 04-08-2024
   Last modifiedVulnerability information updated.

Description

An out-of-bounds read/write vulnerability when executing lazily compiled inner generator functions in Facebook Hermes prior to commit 091835377369c8fd5917d9b87acffa721ad2a168 allows attackers to potentially 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.

• CWE-787Out-of-bounds WriteThe product writes data past the end, or before the beginning, of the intended buffer.
• CWE-125Out-of-bounds ReadThe product reads data past the end, or before the beginning, of the intended buffer.