Cisco NX-OS Software Remote Management Memory Leak Denial of Service Vulnerability (Cisco Cisco NX-OS Software)
At a glance
- Source
- NVD
- EPSS
- EPSS 1.53 % · percentile 75 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- cisco
- NVD status
- Modified
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.
Weaknesses (CWE)
- CWE-400 — Uncontrolled Resource Consumption
- CWE-772 — Missing Release of Resource after Effective Lifetime
References
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.0 | HIGH 7.7 | CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H | cisco |
| CVSS 3.1 | HIGH 7.7 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H | NVD · nvd@nist.gov (Primary) |
| CVSS 3.0 | HIGH 7.7 | CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H | NVD · psirt@cisco.com (Secondary) |
| CVSS 2.0 | MEDIUM 4.0 | AV:N/AC:L/Au:S/C:N/I:N/A:P | NVD · nvd@nist.gov (Primary) |
European references
- ENISA EUVD · EUVD-2019-10522
- GCVE · GCVE-0-2019-1965
CERT-FR advisories
- CERTFR-2019-AVI-414 — Multiples vulnérabilités dans les produits Cisco · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:*≥ 5.2 < 6.2\(29\)cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:*≥ 7.3 < 8.4cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:*≥ 7.0\(3\)f < 9.2cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:*< 7.1\(5\)n1\(1b\)cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:*≥ 7.3 < 7.3\(5\)n1\(1\)cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:*< 6.2\(22\)cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:*≥ 7.2 < 7.3\(4\)d1\(1\)cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:*≥ 8.0 < 8.2\(3\)cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:*≥ 8.3 < 8.4cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:*< 7.0\(3\)i4\(9\)cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:*≥ 7.0\(3\)i7 < 7.0\(3\)i7\(4\)cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:*≥ 7.0\(3\)i7 < 7.0\(3\)i7\(6\)cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:*≥ 9.2 < 9.2\(3\)cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:*< 3.2\(3k\)cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:*≥ 4.0 < 4.0\(2e\)
Affected products
| Product | Versions |
|---|---|
| Cisco · Cisco NX-OS Software | affected unspecified < 8.4(1) |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |