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CVE-2023-4578

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Date: September 11, 2023

When calling `JS::CheckRegExpSyntax` a Syntax Error could have been set which would end in calling `convertToRuntimeErrorAndClear`. A path in the function could attempt to allocate memory when none is available which would have caused a newly created Out of Memory exception to be mishandled as a Syntax Error. This vulnerability affects Firefox < 117, Firefox ESR < 115.2, and Thunderbird < 115.2.

Language: C++

Severity Score

Related Resources (6)

https://www.mozilla.org/security/advisories/mfsa2023-34/
https://www.mozilla.org/security/advisories/mfsa2023-36/
https://bugzilla.mozilla.org/show_bug.cgi?id=1839007
https://www.mozilla.org/security/advisories/mfsa2023-38/
https://nvd.nist.gov/vuln/detail/CVE-2023-4578
https://www.mend.io/vulnerability-database/CVE-2023-4578

Severity Score

Weakness Type (CWE)

Allocation of Resources Without Limits or Throttling

CWE-770

Top Fix

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Upgrade to version mozjs_sys - no_fix

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): REQUIRED
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

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