VulnerabilityModified
CVE-2021-36710
Improper MMU management and having a low GDT address allows it to be mapped in userland.
HIGH 8.8EPSS 0.34%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.34%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
ToaruOS 1.99.2 is affected by incorrect access control via the kernel. Improper MMU management and having a low GDT address allows it to be mapped in userland. A call gate can then be written to escalate to CPL 0.
- CVSS 3.1
- 8.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- EPSS
- 0.34% probability · 28th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-668
- Affected
- toaruos/toaruos
- Source
- cve@mitre.org
References
- https://github.com/mehsauce/kowasuos/blob/master/exploits/kowasu-sysfunc-strikes-back.cExploit, Third Party Advisory
- https://github.com/mehsauce/kowasuos/blob/master/exploits/kowasu-sysfunc-strikes-back.cExploit, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.