CVE-2020-15107

x87 FPU operations in enclaves are vulnerable to ABI poisoning in openenclave

Description

In openenclave before 0.10.0, enclaves that use x87 FPU operations are vulnerable to tampering by a malicious host application. By violating the Linux System V Application Binary Interface (ABI) for such operations, a host app can compromise the execution integrity of some x87 FPU operations in an enclave. Depending on the FPU control configuration of the enclave app and whether the operations are used in secret-dependent execution paths, this vulnerability may also be used to mount a side-channel attack on the enclave. This has been fixed in 0.10.0 and the current master branch. Users will need to recompile their applications against the patched libraries to be protected from this vulnerability.

5.3

CVSS

Severity: Medium

CVSS 3.1 •

CVSS 2.0 •

EPSS 0.10%

Third-Party Advisory github.com

Affected: openenclave openenclave

References

Link	Tags
https://github.com/openenclave/openenclave/security/advisories/GHSA-7wjx-wcwg-w999	third party advisory

Frequently Asked Questions

What is the severity of CVE-2020-15107?: CVE-2020-15107 has been scored as a medium severity vulnerability.
How to fix CVE-2020-15107?: To fix CVE-2020-15107, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2020-15107 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2020-15107 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2020-15107?: CVE-2020-15107 affects openenclave openenclave.

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