Code Injection in pac-resolver - CVE-2021-23406
Published: September 8, 2021
Vulnerability identifier: #VU56397
CSH Severity: High
CVSS v4.0: 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
Vendor: Nathan Rajlich
Affected software:
pac-resolver
pac-resolver
Detailed vulnerability 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.
How to mitigate CVE-2021-23406
Install updates from vendor's website.
Sources
- 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