CVE-2023-5174: Use After Free
First published: Tue Sep 26 2023(Updated: )
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.
Credit: security@mozilla.org security@mozilla.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Mozilla Thunderbird | <115.3 | 115.3 |
| Mozilla Firefox ESR | <115.3 | 115.3 |
| Mozilla Firefox | <118 | 118 |
| Mozilla Firefox | <118 | |
| Mozilla Firefox ESR | <115.3 | |
| Mozilla Thunderbird | <115.3 | |
| Microsoft Windows | ||
| All of | ||
| Any of | ||
| Mozilla Firefox | <118 | |
| Mozilla Firefox ESR | <115.3 | |
| Mozilla Thunderbird | <115.3 | |
| Microsoft Windows |
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Reference Links
- https://bugzilla.mozilla.org/show_bug.cgi?id=1848454
- https://www.mozilla.org/en-US/security/advisories/mfsa2023-41/
- https://www.mozilla.org/en-US/security/advisories/mfsa2023-42/
- https://www.mozilla.org/en-US/security/advisories/mfsa2023-43/
- https://www.mozilla.org/security/advisories/mfsa2023-41/
- https://www.mozilla.org/security/advisories/mfsa2023-42/
- https://www.mozilla.org/security/advisories/mfsa2023-43/
Peer vulnerabilities
(Found alongside the following vulnerabilities)
Frequently Asked Questions
What is the vulnerability ID?
The vulnerability ID is CVE-2023-5174.
What is the severity of CVE-2023-5174?
The severity of CVE-2023-5174 is medium.
Which software is affected by CVE-2023-5174?
Mozilla Firefox ESR 115.3, Mozilla Firefox up to version 118, and Mozilla Thunderbird 115.3 are affected by CVE-2023-5174.
How can CVE-2023-5174 be exploited?
CVE-2023-5174 can be exploited through a use-after-free vulnerability caused by a failure to duplicate a handle during process creation.
Is there a fix available for CVE-2023-5174?
Yes, a fix for CVE-2023-5174 is available. It is recommended to update to Mozilla Firefox ESR 115.3, Mozilla Firefox version 118, or Mozilla Thunderbird 115.3.
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