Use After Free in Microsoft Windows
CVE-2023-5174
If Windows failed to duplicate a handle during process creation, the sandbox code may have inadvertently freed a pointer twice, resulting in a use-after-free and a potentially exploitable crash. *This bug only affects Firefox on Windows when run in non-standard configurations (such as using `runas`). Other operating systems are unaffected.* This vulnerability affects Firefox < 118, Firefox ESR < 115.3, and Thunderbird < 115.3.
Vulnerability class: Use-After-Free
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.012 (67.7th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 68th percentile — 67.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.010 · newest: 0.012 · change: +0.002
Affected products
- Microsoft Windows
- Mozilla Firefox — versions unspecified
- Mozilla Firefox Esr — versions unspecified
- Mozilla Firefox Esr
- Mozilla Thunderbird — versions unspecified
Weakness classification (CWE)
References
- bugzilla.mozilla.org/show_bug.cgi (Permissions Required)
- www.mozilla.org/security/advisories/mfsa2023-41/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2023-42/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2023-43/ (Vendor Advisory)
Frequently asked questions
- What is CVE-2023-5174?
- CVE-2023-5174 is a critical-severity vulnerability in Microsoft Windows, classified under Use After Free. CVSS score: 9.8/10. Published 2023-09-27.
- How severe is CVE-2023-5174?
- Critical severity. CVSS v3 base score is 9.8 out of 10.