Medium severity · published Sep 11, 2023
CVE-2023-4577
When `UpdateRegExpStatics` attempted to access `initialStringHeap` it could already have been garbage collected prior to entering the function, which could potentially have led to…
6.5
CVSS
0.7%
EPSS
No
On KEV
Description
When `UpdateRegExpStatics` attempted to access `initialStringHeap` it could already have been garbage collected prior to entering the function, which could potentially have led to an exploitable crash. This vulnerability affects Firefox < 117, Firefox ESR < 115.2, and Thunderbird < 115.2.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 51% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FI
Firefox · Mozilla
before 117.0 · source: NVD
FE
Firefox Esr · Mozilla
before 115.2 · source: NVD
TH
Thunderbird · Mozilla
before 115.2 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-4577
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-4577
Issue Tracking
https://bugzilla.mozilla.org/show_bug.cgi?id=1847397
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/
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