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Improper token validation leading to code execution in Teleport

High severity GitHub Reviewed Published Aug 25, 2022 to the GitHub Advisory Database • Updated Aug 8, 2023

Package

gomod github.com/gravitational/teleport (Go)

Affected versions

< 8.3.17
>= 9.0.0, < 9.3.13
>= 10.0.0, < 10.1.2

Patched versions

8.3.17
9.3.13
10.1.2

Description

Teleport 9.3.6 is vulnerable to Command injection leading to Remote Code Execution. An attacker can craft a malicious ssh agent installation link by URL encoding a bash escape with carriage return line feed. This url encoded payload can be used in place of a token and sent to a user in a social engineering attack. This is fully unauthenticated attack utilizing the trusted teleport server to deliver the payload.

References

Published by the National Vulnerability Database Aug 24, 2022
Published to the GitHub Advisory Database Aug 25, 2022
Reviewed Aug 30, 2022
Last updated Aug 8, 2023

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS score

3.086%
(91st percentile)

Weaknesses

CVE ID

CVE-2022-36633

GHSA ID

GHSA-6xf3-5hp7-xqqg

Source code

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