Vulnerability Description
A vulnerability in the Virtual Shell (VSH) session management for Cisco NX-OS Software could allow an authenticated, remote attacker to cause a VSH process to fail to delete upon termination. This can lead to a build-up of VSH processes that overtime can deplete system memory. When there is no system memory available, this can cause unexpected system behaviors and crashes. The vulnerability is due to the VSH process not being properly deleted when a remote management connection to the device is disconnected. An attacker could exploit this vulnerability by repeatedly performing a remote management connection to the device and terminating the connection in an unexpected manner. A successful exploit could allow the attacker to cause the VSH processes to fail to delete, which can lead to a system-wide denial of service (DoS) condition. The attacker must have valid user credentials to log in to the device using the remote management connection.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Cisco | Nx-Os | >= 5.2, < 6.2\(29\) |
| Cisco | Mds 9132T | - |
| Cisco | Mds 9148S | - |
| Cisco | Mds 9148T | - |
| Cisco | Mds 9216 | - |
| Cisco | Mds 9216A | - |
| Cisco | Mds 9216I | - |
| Cisco | Mds 9222I | - |
| Cisco | Mds 9250I | - |
| Cisco | Mds 9396S | - |
| Cisco | Mds 9396T | - |
| Cisco | Mds 9506 | - |
| Cisco | Mds 9509 | - |
| Cisco | Mds 9513 | - |
| Cisco | Mds 9706 | - |
| Cisco | Mds 9710 | - |
| Cisco | Mds 9718 | - |
| Cisco | N9K-C9504-Fm-R | - |
| Cisco | N9K-C9508-Fm-R | - |
| Cisco | N9K-X96136Yc-R | - |
Related Weaknesses (CWE)
References
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-2Vendor Advisory
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-2Vendor Advisory
FAQ
What is CVE-2019-1965?
CVE-2019-1965 is a vulnerability with a CVSS score of 7.7 (HIGH). A vulnerability in the Virtual Shell (VSH) session management for Cisco NX-OS Software could allow an authenticated, remote attacker to cause a VSH process to fail to delete upon termination. This can...
How severe is CVE-2019-1965?
CVE-2019-1965 has been rated HIGH with a CVSS base score of 7.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2019-1965?
Check the references section above for vendor advisories and patch information. Affected products include: Cisco Nx-Os, Cisco Mds 9132T, Cisco Mds 9148S, Cisco Mds 9148T, Cisco Mds 9216.