CVE-2022-39347
Description
A directory traversal issue was discovered in FreeRDP. The vulnerability exists due to missing path canonicalization and base path check for the drive channel. A malicious server can trick a FreeRDP based client to read files outside of the shared directory. This issue allows an attacker to gain access to sensitive information.
Mitigation
Users who are unable to upgrade should not use the /drive, /drives or +home-drive redirection switches.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 4.8 | 5.7 | N/A |
| Attack Vector | Network | Network | N/A |
| Attack Complexity | High | Low | N/A |
| Privileges Required | Low | Low | N/A |
| User Interaction | Required | Required | N/A |
| Scope | Unchanged | Unchanged | N/A |
| Confidentiality | High | High | N/A |
| Integrity Impact | None | None | N/A |
| Availability Impact | None | None | N/A |
Vector
Red Hat: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:N/A:N
NVD: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N
Red Hat CVSS v3 Score Explanation
AC:H, An attacker must have control of an RDP server to which the victim/client connects.
Acknowledgements
Upstream acknowledges Team BT5 (BoB 11th) as the original reporter.
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