#VU56397 Code Injection in pac-resolver - CVE-2021-23406
Published: September 8, 2021
Vulnerability identifier: #VU56397
Vulnerability risk: High
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Amber
CVE-ID: CVE-2021-23406
CWE-ID: CWE-94
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
pac-resolver
pac-resolver
Software vendor:
Nathan Rajlich
Nathan Rajlich
Description
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to improper input validation within unsafe PAC file handling. A remote attacker can send a specially crafted HTTP request and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Remediation
Install updates from vendor's website.
External links
- https://github.com/TooTallNate/node-degenerator/commit/9d25bb67d957bc2e5425fea7bf7a58b3fc64ff9e
- https://github.com/TooTallNate/node-degenerator/commit/ccc3445354135398b6eb1a04c7d27c13b833f2d5
- https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1568506
- https://github.com/TooTallNate/node-pac-resolver/releases/tag/5.0.0
- https://snyk.io/vuln/SNYK-JS-PACRESOLVER-1564857