PT-2025-39844 · Sunos+1 · Sunos+1

Zq-Star · Published 2025-09-29 · Updated 2025-12-23 · CVE-2025-56233

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Openindiana, kernel SunOS 5.11

Description The software exhibits a denial of service condition due to improper handling of TCP packets. Specifically, when processing TCP packets with the RST or SYN flag set, the system accepts a wide range of sequence numbers, deviating from RFC5961 standards. This allows attackers to disrupt established connections by sending multiple random TCP RST/SYN packets that fall within the acceptable sequence number range, leading to a denial of service.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

DoS

Resource Exhaustion

Weakness Enumeration

CWE-400

Related Identifiers

CVE-2025-56233

Affected Products

Openindiana

Sunos

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2025-56233 · Security Note
• https://twitter.com/CVEnew/status/2003567343444656158 · Twitter Post
• https://t.me/CVEtracker/33633 · Telegram Post
• https://github.com/zq-star/TCP-Vuln-Report/blob/master/Openindiana%20minimal/tcp-rst-syn/openindiana-minimal-tcp-rst-syn.md · Note