Multiple vulnerabilities in FreeBSD

Published: 2021-05-27

Risk	Low
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2021-29629 CVE-2021-29628
CWE-ID	CWE-20 CWE-254
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	FreeBSD Operating systems & Components / Operating system
Vendor	FreeBSD Foundation

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Input validation error

EUVDB-ID: #VU53617

Risk: Low

CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-29629

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of messages in libradius(3). A remote radius client can pass specially crafted input to the system and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

FreeBSD: 11.0 - 13.0 RC5-p1

External links

http://www.freebsd.org/security/advisories/FreeBSD-SA-21:12.libradius.asc

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Security features bypass

EUVDB-ID: #VU53618

Risk: Low

CVSSv3.1: 6.2 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-29628

CWE-ID: CWE-254 - Security Features

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists in the SMAP capability implementation. A local user can bypass SMAP protection and perform unauthorized actions on the system.