Multiple vulnerabilities in FreeBSD

1) Buffer overflow

EUVDB-ID: #VU66475

Risk: Medium

CVSSv3.1: 8.6 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-23092

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a remote user to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error in lib9p implementation used by bhyve(8). A remote user on the guest OS can send a specially crafted message to trigger memory corruption and execute arbitrary code on the host OS.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

FreeBSD: 13.0 - 13.1

External links

http://www.freebsd.org/security/advisories/FreeBSD-SA-22:12.lib9p.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) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU66474

Risk: Low

CVSSv3.1: 5.7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-23091

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

Exploit availability: No

Description

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

The vulnerability exists due to an error in virtual mapping implementation. An local unprivileged process can maintain a mapping of a page after it is freed, allowing that process to read private data belonging to other processes or the kernel.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

FreeBSD: 12.0 - 13.1

External links

http://www.freebsd.org/security/advisories/FreeBSD-SA-22:11.vm.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.

3) Use-after-free

EUVDB-ID: #VU66473

Risk: Low

CVSSv3.1: 7.7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-23090

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

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

The vulnerability exists due to a use-after-free error in the aio(4) subsystem. The aio_aqueue function, used by the lio_listio system call, fails to release a reference to a credential in an error case. A local user can trigger a use-after-free error and execute arbitrary code with elevated privileges.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

FreeBSD: 12.0 - 13.1

External links

http://www.freebsd.org/security/advisories/FreeBSD-SA-22:10.aio.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.

4) Out-of-bounds read

EUVDB-ID: #VU66472

Risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-23089

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary condition within the elf_note_prpsinfo() function in prpsinfo. A local user can trigger an out-of-bounds read error and crash the OS kernel.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

FreeBSD: 12.0 - 13.1

External links

http://www.freebsd.org/security/advisories/FreeBSD-SA-22:09.elf.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.