PT-2020-15165 · Facebook · Hermes

Published 2020-09-09 · Updated 2022-05-24 · CVE-2020-1912

Positive Technologies (AI Summary)

CVSS v3.1

8.1

High

Base vector

AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Facebook Hermes versions prior to commit 091835377369c8fd5917d9b87acffa721ad2a168

Description The issue is related to an out-of-bounds read/write vulnerability when executing lazily compiled inner generator functions. This could potentially allow attackers to execute arbitrary code via crafted JavaScript, but only if the application using Hermes permits evaluation of untrusted JavaScript.

Recommendations For Facebook Hermes versions prior to commit 091835377369c8fd5917d9b87acffa721ad2a168, update to a version that includes the fix for this issue. As a temporary workaround, consider restricting the evaluation of untrusted JavaScript in applications using Hermes to minimize the risk of exploitation.

Fix

Out of bounds Read

Memory Corruption

Weakness Enumeration

CWE-125

CWE-787

Related Identifiers

CVE-2020-1912

GHSA-PF27-929J-9PMM

Affected Products

Hermes

References · 5

• https://github.com/facebook/hermes/commit/091835377369c8fd5917d9b87acffa721ad2a168 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2020-1912 · Security Note
• https://osv.dev/vulnerability/GHSA-pf27-929j-9pmm · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2020-1912 · Vendor Advisory
• https://facebook.com/security/advisories/cve-2020-1912 · Vendor Advisory