Vulnerability Description
A flaw null pointer dereference in the Nitro Enclaves kernel driver was found in the way that Enclaves VMs forces closures on the enclave file descriptor. A local user of a host machine could use this flaw to crash the system or escalate their privileges on the system.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Nitro Enclaves Project | Nitro Enclaves | < 5.10.0 |
| Redhat | Enterprise Linux | 8.0 |
| Fedoraproject | Fedora | 34 |
Related Weaknesses (CWE)
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1953022Issue TrackingThird Party Advisory
- https://lore.kernel.org/lkml/20210429165941.27020-2-andraprs%40amazon.com/
- https://bugzilla.redhat.com/show_bug.cgi?id=1953022Issue TrackingThird Party Advisory
- https://lore.kernel.org/lkml/20210429165941.27020-2-andraprs%40amazon.com/
FAQ
What is CVE-2021-3543?
CVE-2021-3543 is a vulnerability with a CVSS score of 6.7 (MEDIUM). A flaw null pointer dereference in the Nitro Enclaves kernel driver was found in the way that Enclaves VMs forces closures on the enclave file descriptor. A local user of a host machine could use this...
How severe is CVE-2021-3543?
CVE-2021-3543 has been rated MEDIUM with a CVSS base score of 6.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-3543?
Check the references section above for vendor advisories and patch information. Affected products include: Nitro Enclaves Project Nitro Enclaves, Redhat Enterprise Linux, Fedoraproject Fedora.