Risk | Medium |
Patch available | YES |
Number of vulnerabilities | 1 |
CVE-ID | CVE-2023-4809 |
CWE-ID | 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 one medium risk vulnerability.
EUVDB-ID: #VU80514
Risk: Medium
CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2023-4809
CWE-ID:
CWE-254 - Security Features
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to bypass implemented firewall rules.
The vulnerability exists due to improper handling of multiple IPv6 fragment headers in pf implementation with "scrub fragment reassemble" rule. A remote attacker can send specially crafted IPv6 packets to the system and bypass implemented filtration rules.
Install updates from vendor's website.
Vulnerable software versionsFreeBSD: 12.0 - 13.2
External linkshttp://www.freebsd.org/security/advisories/FreeBSD-SA-23:10.pf.asc
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.