CVE-2021-34999

OpenBSD Kernel Multicast Routing Uninitialized Memory Information Disclosure Vulnerability. This vulnerability allows local attackers to disclose sensitive information on affected installations of OpenBSD Kernel. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the implementation of multicast routing. The issue results from the lack of proper initialization of memory prior to accessing it. An attacker can leverage this in conjunction with other vulnerabilities to escalate privileges and execute arbitrary code in the context of the kernel. . Was ZDI-CAN-14540.

• CWE-908

• https://www.zerodayinitiative.com/advisories/ZDI-22-073/Third Party Advisory
• https://www.zerodayinitiative.com/advisories/ZDI-22-073/Third Party Advisory

Published

May 7, 2024

Last Modified

Jun 17, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2021-34993This vulnerability allows remote attackers to bypass authent…9.8
• CVE-2021-34994This vulnerability allows remote attackers to execute arbitr…8.8
• CVE-2021-34995This vulnerability allows remote attackers to execute arbitr…8.8
• CVE-2021-34996This vulnerability allows remote attackers to execute arbitr…8.8
• CVE-2021-34997This vulnerability allows remote attackers to execute arbitr…8.8
• CVE-2021-34998This vulnerability allows local attackers to escalate privil…7.8
• CVE-2021-3500A flaw was found in djvulibre-3.5.28 and earlier. A Stack ov…7.8
• CVE-2021-35000OpenBSD Kernel Multicast Routing Uninitialized Memory Inform…3.3
• CVE-2021-35001BMC Track-It! GetData Missing Authorization Information Disc…6.5
• CVE-2021-35002BMC Track-It! Unrestricted File Upload Remote Code Execution…8.8
• CVE-2021-35003This vulnerability allows remote attackers to execute arbitr…9.8
• CVE-2021-35004This vulnerability allows remote attackers to execute arbitr…9.8