SB2021052716 - Multiple vulnerabilities in FreeBSD

Description

This security bulletin contains information about 2 vulnerabilities.

1) Input validation error (CVE-ID: CVE-2021-29629)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear

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.

2) Security features bypass (CVE-ID: CVE-2021-29628)

CWE-ID: CWE-254 - Security Features

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear

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.

Remediation

Install update from vendor's website.

References

• https://www.freebsd.org/security/advisories/FreeBSD-SA-21:12.libradius.asc
• https://www.freebsd.org/security/advisories/FreeBSD-SA-21:11.smap.asc