CVE-2022-29173 Information

Description

go-tuf is a Go implementation of The Update Framework (TUF). go-tuf does not correctly implement the client workflow for updating the metadata files for roles other than the root role. Specifically checks for rollback attacks are not implemented correctly meaning an attacker can cause clients to install software that is older than the software which the client previously knew to be available and may include software with known vulnerabilities. In more detail the client code of go-tuf has several issues in regards to preventing rollback attacks: 1. It does not take into account the content of any previously trusted metadata if available before proceeding with updating roles other than the root role (i.e. steps 5.4.3.1 and 5.5.5 of the detailed client workflow). This means that any form of version verification done on the newly-downloaded metadata is made using the default value of zero which always passes. 2. For both timestamp and snapshot roles go-tuf saves these metadata files as trusted before verifying if the version of the metafiles they refer to is correct (i.e. steps 5.5.4 and 5.6.4 of the detailed client workflow). A fix is available in version 0.3.0 or newer. No workarounds are known for this issue apart from upgrading.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Reference

https://github.com/theupdateframework/go-tuf/commit/ed6788e710fc3093a7ecc2d078bf734c0f200d8d https://github.com/theupdateframework/go-tuf/security/advisories/GHSA-66x3-6cw3-v5gj

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

8.8