CVE-2023-5174

moderate-risk
Published 2023-09-27

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.

Do I need to act?

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0.45% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
9
CVSS 9.8/10 Critical
NETWORK / LOW complexity

Affected Products (3)

Affected Vendors

Mozilla

References (8)

Permissions Required https://bugzilla.mozilla.org/show_bug.cgi?id=1848454
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2023-41/
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2023-42/
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2023-43/
Permissions Required https://bugzilla.mozilla.org/show_bug.cgi?id=1848454
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2023-41/
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2023-42/
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2023-43/
43
/ 100
moderate-risk
Severity 32/34 · Critical
Exploitability 2/34 · Minimal
Exposure 9/34 · Low