PT-2023-19037 · Facebook · Hermes

Published 2023-05-18 · Updated 2025-01-31 · CVE-2023-23556

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions Hermes versions prior to commit a6dcafe6ded8e61658b40f5699878cd19a481f80

Description An error in BigInt conversion to Number in Hermes could have been used by a malicious attacker to execute arbitrary code due to an out-of-bound write. This issue is only exploitable in cases where Hermes is used to execute untrusted JavaScript, and most React Native applications are not affected.

Recommendations For versions prior to commit a6dcafe6ded8e61658b40f5699878cd19a481f80, update to a version that includes the fix for the BigInt conversion to Number error to prevent potential arbitrary code execution. As a temporary workaround, consider restricting the execution of untrusted JavaScript in Hermes until a patch is available.

Fix

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

CVE-2023-23556

Affected Products

Hermes

References · 8

• https://github.com/facebook/hermes/commit/a6dcafe6ded8e61658b40f5699878cd19a481f80 · Patch
• https://facebook.com/security/advisories/cve-2023-23556 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2023-23556 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-23556 · Security Note
• https://t.me/cibsecurity/64438 · Telegram Post
• https://t.me/cvenotify/51248 · Telegram Post
• https://t.me/cvenotify/50778 · Telegram Post
• https://t.me/cvenotify/109406 · Telegram Post