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CVE-2024-43357— JavaScript specification issue may lead to type confusion and pointer dereference in implementations

CVSS 8.6 · High EPSS 0.67% · P49
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I. Basic Information for CVE-2024-43357

Vulnerability Information
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Vulnerability Title
JavaScript specification issue may lead to type confusion and pointer dereference in implementations
Source: CVE Program / CVE List V5
Vulnerability 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
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未捕获的异常
Source: CVE Program / CVE List V5
Vulnerability Title
ECMAScript 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
ECMAScript是Ecma TC39开源的一个语言库。 ECMAScript 2022至2025之前版本存在安全漏洞，该漏洞源于存在JavaScript规范问题，从而导致实现中的类型混淆和指针取消引用。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
tc39ecma262 >= 2022, < 2025 -

II. Public POCs for CVE-2024-43357

#POC DescriptionSource LinkShenlong Link
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Qwen3.6-35B-A3B · 8372 chars
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III. Intelligence Information for CVE-2024-43357

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Patches & Fixes for CVE-2024-43357 (3)

Vendor Advisories for CVE-2024-43357 (3)

Other References for CVE-2024-43357 (3)

IV. Related Vulnerabilities

Same weakness: CWE-248

V. Comments for CVE-2024-43357

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