Multiple vulnerabilities in FreeBSD

Published: 2020-12-01

Risk	Medium
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2020-25577 CVE-2020-7469
CWE-ID	CWE-119 CWE-416
Exploitation vector	Network
Public exploit	N/A
Vulnerable software	FreeBSD Operating systems & Components / Operating system
Vendor	FreeBSD Foundation

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Buffer overflow

EUVDB-ID: #VU48743

Risk: Low

CVSSv4.0: 4 [CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-25577

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows an attacker to execute arbitrary code on the target system.

There are two vulnerabilities in rtsold(8) when processing RDNSS and DNSSL options. An attacker with the ability to connect to a physical network can send specially crafted packets to the daemon, trigger memory corruption and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

FreeBSD: 11.0 - 12.2

CPE2.3

External links

https://www.freebsd.org/security/advisories/FreeBSD-SA-20:32.rtsold.asc

Q & A

Can this vulnerability be exploited remotely?

No. The attacker should have physical access to the system in order to successfully exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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

2) Use-after-free

EUVDB-ID: #VU48744

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-7469

CWE-ID: CWE-416 - Use After Free