The default configuration of OpenSSH through 6.1 enforces a fixed time limit between establishing a TCP connection and completing a login, which makes it easier for remote attackers to cause a denial of service (connection-slot exhaustion) by periodically making many new TCP connections.
This vulnerability carries a HIGH severity rating with a CVSS v3.1 score of 7.5, indicating it can be exploited remotely over the network with relatively low complexity without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts and availability (service disruption) for affected systems. Impacting 1 product from openbsd organizations running these solutions should prioritize assessment and patching.
Documented in 2013, this vulnerability occurred amid the cloud computing expansion era, where traditional network perimeter security models were being reevaluated. Organizations were transitioning from isolated infrastructure to interconnected systems, creating new attack surfaces that vulnerabilities like this could exploit.
2013-03-07T20:55:01.000
2026-05-29T21:16:23.257
Modified
CVSSv3.1: 7.5 (HIGH)
AV:N/AC:L/Au:N/C:N/I:N/A:P
10.0
2.9
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Application | openbsd | openssh | ≤ 6.1 | Yes |
| Application | openbsd | openssh | 1.2 | Yes |
| Application | openbsd | openssh | 1.2.1 | Yes |
| Application | openbsd | openssh | 1.2.2 | Yes |
| Application | openbsd | openssh | 1.2.3 | Yes |
| Application | openbsd | openssh | 1.2.27 | Yes |
| Application | openbsd | openssh | 1.3 | Yes |
| Application | openbsd | openssh | 1.5 | Yes |
| Application | openbsd | openssh | 1.5.7 | Yes |
| Application | openbsd | openssh | 1.5.8 | Yes |
| Application | openbsd | openssh | 2.1 | Yes |
| Application | openbsd | openssh | 2.1.1 | Yes |
| Application | openbsd | openssh | 2.2 | Yes |
| Application | openbsd | openssh | 2.3 | Yes |
| Application | openbsd | openssh | 2.3.1 | Yes |
| Application | openbsd | openssh | 2.5 | Yes |
| Application | openbsd | openssh | 2.5.1 | Yes |
| Application | openbsd | openssh | 2.5.2 | Yes |
| Application | openbsd | openssh | 2.9 | Yes |
| Application | openbsd | openssh | 2.9.9 | Yes |
| Application | openbsd | openssh | 2.9.9p2 | Yes |
| Application | openbsd | openssh | 2.9p1 | Yes |
| Application | openbsd | openssh | 2.9p2 | Yes |
| Application | openbsd | openssh | 3.0 | Yes |
| Application | openbsd | openssh | 3.0.1 | Yes |
| Application | openbsd | openssh | 3.0.1p1 | Yes |
| Application | openbsd | openssh | 3.0.2 | Yes |
| Application | openbsd | openssh | 3.0.2p1 | Yes |
| Application | openbsd | openssh | 3.0p1 | Yes |
| Application | openbsd | openssh | 3.1 | Yes |
| Application | openbsd | openssh | 3.1p1 | Yes |
| Application | openbsd | openssh | 3.2 | Yes |
| Application | openbsd | openssh | 3.2.2 | Yes |
| Application | openbsd | openssh | 3.2.2p1 | Yes |
| Application | openbsd | openssh | 3.2.3p1 | Yes |
| Application | openbsd | openssh | 3.3 | Yes |
| Application | openbsd | openssh | 3.3p1 | Yes |
| Application | openbsd | openssh | 3.4 | Yes |
| Application | openbsd | openssh | 3.4p1 | Yes |
| Application | openbsd | openssh | 3.5 | Yes |
| Application | openbsd | openssh | 3.5p1 | Yes |
| Application | openbsd | openssh | 3.6 | Yes |
| Application | openbsd | openssh | 3.6.1 | Yes |
| Application | openbsd | openssh | 3.6.1p1 | Yes |
| Application | openbsd | openssh | 3.6.1p2 | Yes |
| Application | openbsd | openssh | 3.7 | Yes |
| Application | openbsd | openssh | 3.7.1 | Yes |
| Application | openbsd | openssh | 3.7.1p1 | Yes |
| Application | openbsd | openssh | 3.7.1p2 | Yes |
| Application | openbsd | openssh | 3.8 | Yes |
| Application | openbsd | openssh | 3.8.1 | Yes |
| Application | openbsd | openssh | 3.8.1p1 | Yes |
| Application | openbsd | openssh | 3.9 | Yes |
| Application | openbsd | openssh | 3.9.1 | Yes |
| Application | openbsd | openssh | 3.9.1p1 | Yes |
| Application | openbsd | openssh | 4.0 | Yes |
| Application | openbsd | openssh | 4.0p1 | Yes |
| Application | openbsd | openssh | 4.1 | Yes |
| Application | openbsd | openssh | 4.1p1 | Yes |
| Application | openbsd | openssh | 4.2 | Yes |
| Application | openbsd | openssh | 4.2p1 | Yes |
| Application | openbsd | openssh | 4.3 | Yes |
| Application | openbsd | openssh | 4.3p1 | Yes |
| Application | openbsd | openssh | 4.3p2 | Yes |
| Application | openbsd | openssh | 4.4 | Yes |
| Application | openbsd | openssh | 4.4p1 | Yes |
| Application | openbsd | openssh | 4.5 | Yes |
| Application | openbsd | openssh | 4.6 | Yes |
| Application | openbsd | openssh | 4.7 | Yes |
| Application | openbsd | openssh | 4.8 | Yes |
| Application | openbsd | openssh | 4.9 | Yes |
| Application | openbsd | openssh | 5.0 | Yes |
| Application | openbsd | openssh | 5.1 | Yes |
| Application | openbsd | openssh | 5.2 | Yes |
| Application | openbsd | openssh | 5.3 | Yes |
| Application | openbsd | openssh | 5.4 | Yes |
| Application | openbsd | openssh | 5.5 | Yes |
| Application | openbsd | openssh | 5.6 | Yes |
| Application | openbsd | openssh | 5.7 | Yes |
| Application | openbsd | openssh | 5.8 | Yes |
| Application | openbsd | openssh | 5.8p2 | Yes |
| Application | openbsd | openssh | 5.9 | Yes |
| Application | openbsd | openssh | 6.0 | Yes |
SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For openbsd's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.