Vulnerability · Published Jun 2, 2023 · Assigned by mozilla
CVE-2023-23602Content Security Policy wasn't being correctly applied to WebSockets in WebWorkers
Medium 6.5
In plain English
A medium-severity security flaw in Firefox from Mozilla. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 49% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)6.5Medium
Exploit odds (30 days)0.6%top 51.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
A mishandled security check when creating a WebSocket in a WebWorker caused the Content Security Policy connect-src header to be ignored. This could lead to connections to restricted origins from inside WebWorkers. This vulnerability affects Firefox < 109, Firefox ESR < 102.7, and Thunderbird < 102.7.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:8 | firefox | 102.7.0-1.el8_7.alma | ALSA-2023:0288 |
| AlmaLinux:9 | firefox | 102.7.0-1.el9_1.alma | ALSA-2023:0285 |
| AlmaLinux:8 | thunderbird | 102.7.1-1.el8_7.alma | ALSA-2023:0463 |
| AlmaLinux:9 | thunderbird | 102.7.1-1.el9_1.alma | ALSA-2023:0476 |
| Alpine:v3.20 | firefox-esr | 102.7.0-r0 | ALPINE-CVE-2023-23602 |
| Alpine:v3.21 | firefox-esr | 102.7.0-r0 | ALPINE-CVE-2023-23602 |
| Alpine:v3.22 | firefox-esr | 102.7.0-r0 | ALPINE-CVE-2023-23602 |
| Alpine:v3.23 | firefox-esr | 102.7.0-r0 | ALPINE-CVE-2023-23602 |
| Debian:12 | firefox-esr | 102.7.0esr-1 | DEBIAN-CVE-2023-23602 |
| Debian:13 | firefox-esr | 102.7.0esr-1 | DEBIAN-CVE-2023-23602 |
| Debian:14 | firefox-esr | 102.7.0esr-1 | DEBIAN-CVE-2023-23602 |
| Debian:12 | thunderbird | 1:102.7.1-1 | DEBIAN-CVE-2023-23602 |
| Debian:13 | thunderbird | 1:102.7.1-1 | DEBIAN-CVE-2023-23602 |
| Debian:14 | thunderbird | 1:102.7.1-1 | DEBIAN-CVE-2023-23602 |
| Rocky Linux:8 | firefox | 0:102.7.0-1.el8_7 | RLSA-2023:0288 |
| Rocky Linux:9 | firefox | 0:102.7.0-1.el9_1 | RLSA-2023:0285 |
| Rocky Linux:8 | thunderbird | 0:102.7.1-1.el8_7 | RLSA-2023:0463 |
| Rocky Linux:9 | thunderbird | 0:102.7.1-1.el9_1 | RLSA-2023:0476 |
| Ubuntu:22.04:LTS | mozjs78 | no fix listed | UBUNTU-CVE-2023-23602 |
| Ubuntu:22.04:LTS | mozjs91 | no fix listed | UBUNTU-CVE-2023-23602 |
| Ubuntu:22.04:LTS | thunderbird | 1:102.7.1+build2-0ubuntu0.22.04.1 | USN-5824-1 |
| Ubuntu:22.04:LTS | thunderbird | 1:102.7.1+build2-0ubuntu0.22.04.1 | UBUNTU-CVE-2023-23602 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | unspecified – before 109 |
| Mozilla | Firefox ESR | unspecified – before 102.7 |
| Mozilla | Thunderbird | unspecified – before 102.7 |
Weakness: CWE-754 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N