CVE-2024-43357 (GCVE-0-2024-43357)
Vulnerability from cvelistv5 – Published: 2024-08-15 18:36 – Updated: 2024-08-15 19:10
VLAI
EPSS
VEX
Title
JavaScript specification issue may lead to type confusion and pointer dereference in implementations
Summary
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
Severity
8.6 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-08-15 18:59 UTC
CWE
Assigner
GitHub_M
CNA
References
10 references
| URL | Tags |
|---|---|
| https://github.com/tc39/ecma262/security/advisori… | x_refsource_CONFIRM |
| https://github.com/boa-dev/boa/security/advisorie… | x_refsource_MISC |
| https://github.com/tc39/ecma262/pull/2413 | x_refsource_MISC |
| https://github.com/tc39/ecma262/commit/1e24a286d0… | x_refsource_MISC |
| https://github.com/tc39/ecma262/commit/4cb5a6980e… | x_refsource_MISC |
| https://bugs.webkit.org/show_bug.cgi?id=275407 | x_refsource_MISC |
| https://bugzilla.mozilla.org/show_bug.cgi?id=1901411 | x_refsource_MISC |
| https://issues.chromium.org/issues/346692561 | x_refsource_MISC |
| https://tc39.es/ecma262/#sec-asyncgenerator-objects | x_refsource_MISC |
| https://www.cve.org/CVERecord?id=CVE-2024-7652 | x_refsource_MISC |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| tc39 | ecma262 |
Affected:
>= 2022, < 2025
|
|
| ecma_international | ecma262 |
Affected:
2022 , < 2025
(custom)
cpe:2.3:a:ecma_international:ecma262:*:*:*:*:*:*:*:* |
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
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Browse all ATT&CK techniques and the vulnerabilities related to each.
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