CVE-2023-4578

Error reporting methods in SpiderMonkey could have triggered an Out of Memory Exception

EPSS 0.5%

Vexday Risk Score

3Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS —EPSS 0.5%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

11 Sep 2023Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

Affected products

Mozilla · Firefox Mozilla · Firefox ESR Mozilla · Thunderbird

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References

https://bugzilla.mozilla.org/show_bug.cgi?id=1839007 https://www.mozilla.org/security/advisories/mfsa2023-34/https://www.mozilla.org/security/advisories/mfsa2023-36/https://www.mozilla.org/security/advisories/mfsa2023-38/