CVE-2021-23406

Public Exploit

Remote Code Execution (RCE)

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.

8.1

CVSS

Severity: High

CVSS 3.1 •

CVSS 2.0 •

EPSS 1.00% Top 25%

Third-Party Advisory github.com Third-Party Advisory github.com Third-Party Advisory github.com Third-Party Advisory snyk.io Third-Party Advisory snyk.io

Affected: n/a pac-resolver

References

Link	Tags
https://snyk.io/vuln/SNYK-JS-PACRESOLVER-1564857	patch third party advisory exploit
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1568506	patch third party advisory exploit
https://github.com/TooTallNate/node-degenerator/commit/ccc3445354135398b6eb1a04c7d27c13b833f2d5	third party advisory patch
https://github.com/TooTallNate/node-degenerator/commit/9d25bb67d957bc2e5425fea7bf7a58b3fc64ff9e	third party advisory patch
https://github.com/TooTallNate/node-pac-resolver/releases/tag/5.0.0	patch third party advisory release notes

Frequently Asked Questions

What is the severity of CVE-2021-23406?: CVE-2021-23406 has been scored as a high severity vulnerability.
How to fix CVE-2021-23406?: To fix CVE-2021-23406, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-23406 being actively exploited in the wild?: It is possible that CVE-2021-23406 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-23406?: CVE-2021-23406 affects n/a pac-resolver.

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