CVE-2021-44421
MEDIUMOcclum < 0.26.0 - Information Disclosure via Pointer-Validation Side-Channel
Title source: llmDescription
The pointer-validation logic in util/mem_util.rs in Occlum before 0.26.0 for Intel SGX acts as a confused deputy that allows a local attacker to access unauthorized information via side-channel analysis.
References (4)
Core 4
Core References
Exploit, Third Party Advisory x_refsource_misc
https://github.com/occlum/occlum/blob/821ea843ae21037e6cff5268306d2da1fb131552/src/libos/src/util/mem_util.rs#L130
Exploit, Third Party Advisory x_refsource_misc
https://github.com/occlum/occlum/blob/821ea843ae21037e6cff5268306d2da1fb131552/src/libos/src/util/mem_util.rs#L51
Patch, Third Party Advisory x_refsource_confirm
https://github.com/occlum/occlum/commit/36918e42bf6732c4d3996bc99eb013eb6b90b249
Third Party Advisory x_refsource_confirm
https://github.com/occlum/occlum/compare/0.25.0...v0.26.0
Scores
CVSS v3
5.5
EPSS
0.0043
EPSS Percentile
34.1%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Details
CWE
CWE-203
Status
published
Products (1)
occlum_project/occlum
< 0.26.0
Published
Mar 10, 2022
Tracked Since
Feb 18, 2026