Auth bypass in FreeBSD
CVE-2021-29628
In FreeBSD 13.0-STABLE before n245764-876ffe28796c, 12.2-STABLE before r369857, 13.0-RELEASE before p1, and 12.2-RELEASE before p7, a system call triggering a fault could cause SMAP protections to be disabled for the duration of the system call. This weakness could be combined with other kernel bugs to craft an exploit.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.012 (68.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 68th percentile — 68.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000
Affected products
- FreeBSD — versions 12.2, 13.0
- FreeBSD — versions FreeBSD 13.0-RELEASE before p1, 12.2-RELEASE before p7
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security.FreeBSD.org/advisories/FreeBSD-SA-21:11.smap.asc (Exploit, Vendor Advisory)
- security.netapp.com/advisory/ntap-20210713-0002/ (Third Party Advisory)
Frequently asked questions
- What is CVE-2021-29628?
- CVE-2021-29628 is a high-severity vulnerability in FreeBSD, classified under Incorrect Authorization. CVSS score: 7.5/10. Published 2021-05-28.
- How severe is CVE-2021-29628?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2021-29628 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.