CVE-2023-4578
MEDIUMFirefox < 117.0, Firefox ESR < 115.2, Thunderbird < 115.2 - Denial of Service via RegExp Syntax Error Mishandling
Title source: llmDescription
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.
References (4)
Core 4
Core References
Issue Tracking, Permissions Required
https://bugzilla.mozilla.org/show_bug.cgi?id=1839007
Vendor Advisory
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/
Scores
CVSS v3
6.5
EPSS
0.0011
EPSS Percentile
28.8%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-770
Status
published
Products (3)
mozilla/firefox
< 117.0
mozilla/firefox_esr
< 115.2
mozilla/thunderbird
< 115.2
Published
Sep 11, 2023
Tracked Since
Feb 18, 2026