PT-2022-28073 · Trustedfirmware · Op-Tee

Anirban Chakraborty + 2 · Published 2022-12-19 · Updated 2022-12-28 · CVE-2022-47549

Positive Technologies (AI Summary)

CVSS v3.1

6.4

Medium

Base vector

AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions TrustedFirmware Open Portable Trusted Execution Environment (OP-TEE) versions prior to 3.20

Description The issue is related to an unprotected memory-access operation in optee os, allowing a physically proximate adversary to bypass signature verification. This can lead to the installation of malicious trusted applications via electromagnetic fault injections.

Recommendations For versions prior to 3.20, update to version 3.20 or later to resolve the issue. As a temporary workaround, consider implementing additional security measures to prevent electromagnetic fault injections, such as using a Faraday cage or other shielding methods to protect the device. Restrict physical access to the device to minimize the risk of exploitation.

Exploit

Fix

Improper Verification of Cryptographic Signature

Weakness Enumeration

CWE-347

Related Identifiers

CVE-2022-47549

GHSA-R64M-H886-HW6G

Affected Products

Op-Tee

References · 5

• 🔥 https://people.linaro.org/~joakim.bech/reports/Breaking_cross-world_isolation_on_ARM_TrustZone_through_EM_faults_coredumps_and_UUID_confusion.pdf · Exploit
• https://osv.dev/vulnerability/CVE-2022-47549 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2022-47549 · Security Note
• https://github.com/OP-TEE/optee_os/security/advisories/GHSA-r64m-h886-hw6g · Note
• https://t.me/cvenotify/40138 · Telegram Post