In libssh2 before 1.9.0, kex_method_diffie_hellman_group_exchange_sha256_key_exchange in kex.c has an integer overflow that could lead to an out-of-bounds read in the way packets are read from the server. A remote attacker who compromises a SSH server may be able to disclose sensitive information or cause a denial of service condition on the client system when a user connects to the server. This is related to an _libssh2_check_length mistake, and is different from the various issues fixed in 1.8.1, such as CVE-2019-3855.
This vulnerability carries a HIGH severity rating with a CVSS v3.1 score of 8.1, indicating it can be exploited remotely over the network with relatively low complexity though user interaction is required and does not require pre-existing privileges . The vulnerability impacts confidentiality (data exposure), and availability (service disruption) for affected systems. Impacting 7 products from libssh2, from debian, from fedoraproject and 4 others, organizations running these solutions should prioritize assessment and patching.
First disclosed in 2019, this vulnerability was reported during a period defined by widespread IoT adoption challenges, mobile security concerns, and the emergence of advanced persistent threat (APT) techniques. Contemporary mitigation strategies focused on secure development practices and third-party component vetting.
2019-07-16T18:15:13.287
2024-11-21T04:24:13.313
Modified
CVSSv3.1: 8.1 (HIGH)
AV:N/AC:M/Au:N/C:P/I:N/A:P
8.6
4.9
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Application | libssh2 | libssh2 | < 1.9.0 | Yes |
| Operating System | debian | debian_linux | 8.0 | Yes |
| Operating System | debian | debian_linux | 9.0 | Yes |
| Operating System | fedoraproject | fedora | 29 | Yes |
| Operating System | fedoraproject | fedora | 30 | Yes |
| Application | netapp | cloud_backup | - | Yes |
| Application | netapp | e-series_santricity_os_controller | ≤ 11.70.1 | Yes |
| Application | netapp | ontap_select_deploy_administration_utility | - | Yes |
| Application | f5 | traffix_systems_signaling_delivery_controller | ≤ 5.1.0 | 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 libssh2'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.