TCP spoofing vulnerability in pf(4)
CVE-2023-6534

7.5HIGH

Key Information:

Vendor

FreeBSD

Status
FreeBSD
Vendor
CVE Published:
13 December 2023

What is CVE-2023-6534?

In specific versions of FreeBSD, the pf packet filter has an issue with the validation of TCP sequence numbers. This vulnerability may allow attackers to perform a denial-of-service attack, compromising the availability of systems protected by the firewall. It is essential for users running these versions to patch their systems promptly to mitigate the risk.

Affected Version(s)

FreeBSD 14.0-RELEASE

FreeBSD 13.2-RELEASE

FreeBSD 12.4-RELEASE

References

https://security.freebsd.org/advisories/FreeBSD-SA-23:17....
vendor-advisory
https://security.netapp.com/advisory/ntap-20240112-0007/

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Yuxiang Yang, Ao Wang, Xuewei Feng, Qi Li and Ke Xu from Tsinghua University
.