Vulnerability · Published Mar 6, 2022 · Assigned by mitre

CVE-2021-44421

Medium 5.5

In plain English

A medium-severity security flaw in the affected software. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 38% of all known vulnerabilities).

Severity (CVSS NVD)5.5Medium

Exploit odds (30 days)0.4%top 62.0% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
n/a	n/a	n/a

References

https://github.com/occlum/occlum/blob/821ea843ae21037e6cff5268306d2da1fb131552/src/libos/src/util/mem_util.rs#L130 x_refsource_MISC
https://github.com/occlum/occlum/blob/821ea843ae21037e6cff5268306d2da1fb131552/src/libos/src/util/mem_util.rs#L51 x_refsource_MISC
https://github.com/occlum/occlum/commit/36918e42bf6732c4d3996bc99eb013eb6b90b249 x_refsource_CONFIRM
https://github.com/occlum/occlum/compare/0.25.0...v0.26.0 x_refsource_CONFIRM