Description (CNA)
OP-TEE OS through 4.10.0, fixed in commit 0aadfc2, contains a null pointer dereference vulnerability in the Widevine pseudo-TA open_session handler that allows Normal World clients to cause a denial of service when CFG_WIDEVINE_PTA is enabled. Attackers can open a session directly on the Widevine PTA to trigger an unconditional dereference of a NULL calling session pointer via is_user_ta_ctx(), faulting the TEE at S-EL1 and crashing the trusted execution environment.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| OP-TEE / optee_os | affected 0 through 4.10.0; unaffected 0aadfc23407f50e770eb5ddd871fc208f5626833 |
CWE
CWE-476
References
- https://github.com/OP-TEE/optee_os/pull/7899
- https://github.com/OP-TEE/optee_os/commit/0aadfc23407f50e770eb5ddd871fc208f5626833
- https://www.vulncheck.com/advisories/op-tee-os-null-pointer-dereference-dos-via-widevine-pta-open-session
ADP enrichment
No English description supplied.
No references supplied.