Vulnerability Details : CVE-2021-40506
An issue was discovered in the ALU unit of the OR1200 (aka OpenRISC 1200) processor 2011-09-10 through 2015-11-11. The overflow flag is not being updated for the msb and mac instructions, which results in an incorrect value in the overflow flag. Any software that relies on this flag may experience corruption in execution.
Vulnerability category: BypassGain privilege
Products affected by CVE-2021-40506
- Openrisc » Or1200 FirmwareVersions from including (>=) 2011-09-10 and up to, including, (<=) 2015-11-11cpe:2.3:o:openrisc:or1200_firmware:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-40506
0.44%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 75 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-40506
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
9.8
|
CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
3.9
|
5.9
|
NIST |
CWE ids for CVE-2021-40506
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When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-40506
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https://github.com/openrisc/or1200/commit/2c0765d7ba12813df273cd693a99c4e744f0fbd5
or1200: add carry, overflow bits, and range exception · openrisc/or1200@2c0765d · GitHubPatch
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https://seth.engr.tamu.edu/software-releases/thehuzz/
New vulnerabilities detected by our hardware fuzzer, TheHuzzThird Party Advisory
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