CVE-2020-15107 x87 FPU operations in enclaves are vulnerable to ABI poisoning in openenclave
A malicious host can compromise enclave execution integrity or mount side-channel attacks via x87 FPU ABI violations in Open Enclave SDK.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2020-15107?
CVE-2020-15107 is a medium-severity vulnerability in openenclave, published on 15 Jul 2020. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official 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.
Which versions are affected by CVE-2020-15107?
It affects 1 product.
Products include Openenclave Openenclave.
How do I fix CVE-2020-15107?
No fix has been published for CVE-2020-15107 yet. Limit exposure of the affected software until one is available.
Is CVE-2020-15107 being exploited?
There is no known exploitation of CVE-2020-15107 in the wild and no public exploit code.
Other vulnerabilities in openenclave
Sources
Also known as GHSA-7wjx-wcwg-w999.