SB2024021553 - Multiple vulnerabilities in FreeBSD

Description

This security bulletin contains information about 2 vulnerabilities.

1) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2024-25940)

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

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 due to incorrect implementation of the bhyveload(8) model. A maliciously crafted script could be used to exfiltrate sensitive data from the host accessible to the user running bhyhveload(8), which is often the system root.

2) Information disclosure (CVE-ID: CVE-2024-25941)

CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor

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

The vulnerability allows a local user to gain access to sensitive information.

The vulnerability exists due information disclosure in jail(2) system call. A local user can get information about TTYs allocated on the host or in other jails.

Remediation

Install update from vendor's website.

References

• https://security.freebsd.org/advisories/FreeBSD-SA-24:01.bhyveload.asc
• https://security.freebsd.org/advisories/FreeBSD-SA-24:02.tty.asc