CVE-2021-23406
CRITICALCVSS 9.8/10EPSS 2.86%
Last modified
CVE-2021-23406 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. This affects the package pac-resolver before 5.0.0. This can occur when used with untrusted input, due to unsafe PAC file handling. EPSS estimates a 2.86% chance of exploitation in the next 30 days.
Description
This affects the package pac-resolver before 5.0.0. This can occur when used with untrusted input, due to unsafe PAC file handling. **NOTE:** The fix for this vulnerability is applied in the node-degenerator library, a dependency written by the same maintainer.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Pac-Resolver Project | Pac-Resolver | < 5.0.0 |
References
- https://github.com/TooTallNate/node-degenerator/commit/9d25bb67d957bc2e5425fea7bf7a58b3fc64ff9ePatch, Third Party Advisory
- https://github.com/TooTallNate/node-degenerator/commit/ccc3445354135398b6eb1a04c7d27c13b833f2d5Patch, Third Party Advisory
- https://github.com/TooTallNate/node-pac-resolver/releases/tag/5.0.0Patch, Release Notes, Third Party Advisory
- https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1568506Exploit, Patch, Third Party Advisory
- https://snyk.io/vuln/SNYK-JS-PACRESOLVER-1564857Exploit, Patch, Third Party Advisory
- https://github.com/TooTallNate/node-degenerator/commit/9d25bb67d957bc2e5425fea7bf7a58b3fc64ff9ePatch, Third Party Advisory
- https://github.com/TooTallNate/node-degenerator/commit/ccc3445354135398b6eb1a04c7d27c13b833f2d5Patch, Third Party Advisory
- https://github.com/TooTallNate/node-pac-resolver/releases/tag/5.0.0Patch, Release Notes, Third Party Advisory
- https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1568506Exploit, Patch, Third Party Advisory
- https://snyk.io/vuln/SNYK-JS-PACRESOLVER-1564857Exploit, Patch, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-23406?
This affects the package pac-resolver before 5.0.0. This can occur when used with untrusted input, due to unsafe PAC file handling. **NOTE:** The fix for this vulnerability is applied in the node-degenerator library, a dependency written by the same maintainer.
How severe is CVE-2021-23406?
CVE-2021-23406 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 2.86% probability of exploitation in the next 30 days.
How do I fix CVE-2021-23406?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
Are you affected by CVE-2021-23406?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST