Main Vulnerability Database Vulnerabilities #VU29003

Path traversal in Converged Security and Management Engine (CSME) and Intel Trusted Execution Engine Firmware - CVE-2020-0539

Published: June 12, 2020

Vulnerability identifier: #VU29003

CSH Severity: Low

CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]

CVE-ID: CVE-2020-0539

CWE-ID: CWE-22

Exploitation vector: Local access

Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local user to perform directory traversal attacks.

The vulnerability exists due to input validation error when processing directory traversal sequences in subsystem for Intel(R) DAL software for Intel(R) CSME. A local user can send a specially crafted HTTP request and cause a denial of service condition on the system.

Note: This vulnerability affects the following versions of Intel CSME and TXE:

CSME:

11.0 through 11.8.76
11.10 through 11.12.76
11.20 through 11.22.76
12.0 through 12.0.63
13.0.31 and 14.0.32

TXE:

3.0 through 3.1.70
4.0 through 4.0.20

Affected software

Converged Security and Management Engine (CSME)
Intel Trusted Execution Engine Firmware

How to mitigate CVE-2020-0539

Install update from vendor's website.

Converged Security and Management Engine (CSME) - addressed in versions 11.8.77, 11.12.77, 11.22.77, 12.0.64, 13.0.32, 14.0.32
Intel Trusted Execution Engine Firmware - addressed in versions 3.1.75, 4.0.25

External References

https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00295.html

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