Vulnerability · Published Sep 27, 2023 · Assigned by mozilla
CVE-2023-5171
Medium 6.5
In plain English
A medium-severity security flaw 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 1.1% (higher than 66% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)6.5Medium
Exploit odds (30 days)1.1%top 33.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
During Ion compilation, a Garbage Collection could have resulted in a use-after-free condition, allowing an attacker to write two NUL bytes, and cause a potentially exploitable crash. This vulnerability affects Firefox < 118, Firefox ESR < 115.3, and Thunderbird < 115.3.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:9 | firefox | 115.3.1-1.el9_2.alma.1 | ALSA-2023:5434 |
| AlmaLinux:9 | firefox-x11 | 115.3.1-1.el9_2.alma.1 | ALSA-2023:5434 |
| AlmaLinux:9 | thunderbird | 115.3.1-1.el9_2.alma | ALSA-2023:5435 |
| Alpine:v3.20 | firefox-esr | 115.3.0-r0 | ALPINE-CVE-2023-5171 |
| Alpine:v3.21 | firefox-esr | 115.3.0-r0 | ALPINE-CVE-2023-5171 |
| Alpine:v3.22 | firefox-esr | 115.3.0-r0 | ALPINE-CVE-2023-5171 |
| Alpine:v3.23 | firefox-esr | 115.3.0-r0 | ALPINE-CVE-2023-5171 |
| Debian:12 | firefox-esr | 115.3.0esr-1~deb12u1 | DEBIAN-CVE-2023-5171 |
| Debian:12 | firefox-esr | 115.3.0esr-1~deb12u1 | DSA-5506-1 |
| Debian:13 | firefox-esr | 115.3.0esr-1 | DEBIAN-CVE-2023-5171 |
| Debian:14 | firefox-esr | 115.3.0esr-1 | DEBIAN-CVE-2023-5171 |
| Debian:12 | thunderbird | 1:115.3.1-1~deb12u1 | DEBIAN-CVE-2023-5171 |
| Debian:12 | thunderbird | 1:115.3.1-1~deb12u1 | DSA-5513-1 |
| Debian:13 | thunderbird | 1:115.3.0-1 | DEBIAN-CVE-2023-5171 |
| Debian:14 | thunderbird | 1:115.3.0-1 | DEBIAN-CVE-2023-5171 |
| Rocky Linux:8 | thunderbird | 0:115.3.1-1.el8_8 | RLSA-2023:5428 |
| Rocky Linux:9 | thunderbird | 0:115.3.1-1.el9_2 | RLSA-2023:5435 |
| Ubuntu:22.04:LTS | mozjs102 | no fix listed | UBUNTU-CVE-2023-5171 |
| Ubuntu:24.04:LTS | mozjs102 | no fix listed | UBUNTU-CVE-2023-5171 |
| Ubuntu:22.04:LTS | mozjs78 | no fix listed | UBUNTU-CVE-2023-5171 |
| Ubuntu:22.04:LTS | mozjs91 | no fix listed | UBUNTU-CVE-2023-5171 |
| Ubuntu:22.04:LTS | thunderbird | 1:115.3.1+build1-0ubuntu0.22.04.2 | UBUNTU-CVE-2023-5171 |
| Ubuntu:22.04:LTS | thunderbird | 1:115.3.1+build1-0ubuntu0.22.04.2 | USN-6405-1 |
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 |
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1851599
- https://www.mozilla.org/security/advisories/mfsa2023-41/
- https://www.mozilla.org/security/advisories/mfsa2023-42/
- https://www.mozilla.org/security/advisories/mfsa2023-43/
- https://www.debian.org/security/2023/dsa-5506
- https://lists.debian.org/debian-lts-announce/2023/09/msg00034.html
- https://www.debian.org/security/2023/dsa-5513
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/AY642Z6JZODQJE7Z62CFREVUHEGCXGPD/
- https://lists.debian.org/debian-lts-announce/2023/10/msg00015.html