Vulnerability · Published Sep 27, 2023 · Assigned by mozilla
CVE-2023-5174
Critical 9.8
In plain English
A critical-severity use-after-free in Firefox from Mozilla. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.2% (higher than 68% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.20 | firefox-esr | 115.3.0-r0 | ALPINE-CVE-2023-5174 |
| Alpine:v3.21 | firefox-esr | 115.3.0-r0 | ALPINE-CVE-2023-5174 |
| Alpine:v3.22 | firefox-esr | 115.3.0-r0 | ALPINE-CVE-2023-5174 |
| Alpine:v3.23 | firefox-esr | 115.3.0-r0 | ALPINE-CVE-2023-5174 |
| Ubuntu:22.04:LTS | mozjs102 | no fix listed | UBUNTU-CVE-2023-5174 |
| Ubuntu:24.04:LTS | mozjs102 | no fix listed | UBUNTU-CVE-2023-5174 |
| Ubuntu:22.04:LTS | mozjs78 | no fix listed | UBUNTU-CVE-2023-5174 |
| Ubuntu:22.04:LTS | mozjs91 | no fix listed | UBUNTU-CVE-2023-5174 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | unspecified – before 118 |
| Mozilla | Firefox ESR | unspecified – before 115.3 |
| Mozilla | Thunderbird | unspecified – before 115.3 |
Weakness: CWE-416 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H