Privilege escalation in FreeBSD
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2021-29627 |
| CWE-ID | CWE-415 |
| Exploitation vector | Local |
| Public exploit | Public exploit code for vulnerability #1 is available. |
| Vulnerable software Subscribe |
FreeBSD Operating systems & Components / Operating system |
| Vendor |
Security Bulletin
This security bulletin contains one low risk vulnerability.
1) Double Free
EUVDB-ID: #VU51948
Risk: Low
CVSSv3.1: 7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C]
CVE-ID: CVE-2021-29627
CWE-ID:
CWE-415 - Double Free
Exploit availability: Yes
DescriptionThe vulnerability allows a local user to gain elevated privileges on the system.
The vulnerability exists due to a boundary error in accept_filter(9) socket configuration interface. A local user can pass specially crafted data to the application, trigger double free error and escalate privileges on the system.
MitigationInstall updates from vendor's website.
Vulnerable software versionsFreeBSD: before 13.0 RC4
External linkshttp://www.freebsd.org/security/advisories/FreeBSD-SA-21:09.accept_filter.asc
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.
