Vulnerability Details : CVE-2020-15107
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.
Exploit prediction scoring system (EPSS) score for CVE-2020-15107
Probability of exploitation activity in the next 30 days: 0.04%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 10 % EPSS Score History EPSS FAQ
CVSS scores for CVE-2020-15107
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source |
---|---|---|---|---|---|
1.2
|
LOW | AV:L/AC:H/Au:N/C:N/I:P/A:N |
1.9
|
2.9
|
NIST |
5.3
|
MEDIUM | CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:N/I:H/A:N |
0.8
|
4.0
|
NIST |
5.3
|
MEDIUM | CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:N/I:H/A:N |
0.8
|
4.0
|
GitHub, Inc. |
References for CVE-2020-15107
-
https://github.com/openenclave/openenclave/security/advisories/GHSA-7wjx-wcwg-w999
x87 FPU operations in enclaves are vulnerable to ABI poisoning · Advisory · openenclave/openenclave · GitHubThird Party Advisory
Products affected by CVE-2020-15107
- cpe:2.3:a:openenclave:openenclave:*:*:*:*:*:*:*:*