VulnerabilityModified
CVE-2023-4578
This vulnerability affects Firefox < 117, Firefox ESR < 115.2, and Thunderbird < 115.2.
MEDIUM 6.5EPSS 0.62%
Does this matter?
Lower severity and a low EPSS score (0.62%). Track it; it rarely justifies an emergency change on its own.
Description
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.
- CVSS 3.1
- 6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- EPSS
- 0.62% probability · 48th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-770
- Affected
- mozilla/firefox · mozilla/firefox esr · mozilla/thunderbird
- Source
- security@mozilla.org
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1839007Issue Tracking, Permissions Required
- https://www.mozilla.org/security/advisories/mfsa2023-34/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2023-36/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2023-38/Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1839007Issue Tracking, Permissions Required
- https://www.mozilla.org/security/advisories/mfsa2023-34/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2023-36/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2023-38/Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.