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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2024-43357 Detail

Description

ECMA-262 is the language specification for the scripting language ECMAScript. A problem in the ECMAScript (JavaScript) specification of async generators, introduced by a May 2021 spec refactor, may lead to mis-implementation in a way that could present as a security vulnerability, such as type confusion and pointer dereference. The internal async generator machinery calls regular promise resolver functions on IteratorResult (`{ done, value }`) objects that it creates, assuming that the IteratorResult objects will not be then-ables. Unfortunately, these IteratorResult objects inherit from `Object.prototype`, so these IteratorResult objects can be made then-able, triggering arbitrary behaviour, including re-entering the async generator machinery in a way that violates some internal invariants. The ECMAScript specification is a living standard and the issue has been addressed at the time of this advisory's public disclosure. JavaScript engine implementors should refer to the latest specification and update their implementations to comply with the `AsyncGenerator` section. ## References - https://github.com/tc39/ecma262/commit/1e24a286d0a327d08e1154926b3ee79820232727 - https://bugzilla.mozilla.org/show_bug.cgi?id=1901411 - https://github.com/boa-dev/boa/security/advisories/GHSA-f67q-wr6w-23jq - https://bugs.webkit.org/show_bug.cgi?id=275407 - https://issues.chromium.org/issues/346692561 - https://www.cve.org/CVERecord?id=CVE-2024-7652


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://bugs.webkit.org/show_bug.cgi?id=275407 GitHub, Inc.
https://bugzilla.mozilla.org/show_bug.cgi?id=1901411 GitHub, Inc.
https://github.com/boa-dev/boa/security/advisories/GHSA-f67q-wr6w-23jq GitHub, Inc.
https://github.com/tc39/ecma262/commit/1e24a286d0a327d08e1154926b3ee79820232727 GitHub, Inc.
https://github.com/tc39/ecma262/commit/4cb5a6980e20be76c648f113c4cc762342172df3 GitHub, Inc.
https://github.com/tc39/ecma262/pull/2413 GitHub, Inc.
https://github.com/tc39/ecma262/security/advisories/GHSA-g38c-wh3c-5h9r GitHub, Inc.
https://issues.chromium.org/issues/346692561 GitHub, Inc.
https://tc39.es/ecma262/#sec-asyncgenerator-objects GitHub, Inc.
https://www.cve.org/CVERecord?id=CVE-2024-7652 GitHub, Inc.

Weakness Enumeration

CWE-ID CWE Name Source
CWE-248 Uncaught Exception GitHub, Inc.  
CWE-476 NULL Pointer Dereference GitHub, Inc.  
CWE-843 Access of Resource Using Incompatible Type ('Type Confusion') GitHub, Inc.  

Change History

3 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2024-43357
NVD Published Date:
08/15/2024
NVD Last Modified:
06/17/2026
Source:
GitHub, Inc.