CVE-2019-1965
Cisco NX-OS Software VSH Session Management Authentication Bypass Denial of Service
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.
INFO
Published Date :
Aug. 28, 2019, 7:15 p.m.
Last Modified :
Oct. 16, 2020, 2:05 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
4.0
Exploitability Score :
3.1
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2019-1965.
| URL | Resource |
|---|---|
| https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190828-nxos-memleak-dos | Vendor Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2019-1965 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2019-1965 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Modified Analysis by [email protected]
Oct. 16, 2020
Action Type Old Value New Value Removed CVSS V3 NIST AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H Added CVSS V3.1 NIST AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H Removed CWE NIST CWE-400 Added CWE NIST CWE-772 -
CVE Modified by [email protected]
Oct. 09, 2019
Action Type Old Value New Value Added CVSS V3 Cisco Systems, Inc. AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H Added CWE Cisco Systems, Inc. CWE-400 -
Initial Analysis by [email protected]
Sep. 05, 2019
Action Type Old Value New Value Added CVSS V2 (AV:N/AC:L/Au:S/C:N/I:N/A:P) Added CVSS V3 AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H Changed Reference Type https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190828-nxos-memleak-dos No Types Assigned https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190828-nxos-memleak-dos Vendor Advisory Added CWE CWE-400 Added CPE Configuration AND OR *cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:* versions from (including) 5.2 up to (excluding) 6.2\(29\) *cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:* versions from (including) 7.3 up to (excluding) 8.4 OR cpe:2.3:h:cisco:mds_9132t:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:mds_9148s:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:mds_9148t:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:mds_9216:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:mds_9216a:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:mds_9216i:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:mds_9222i:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:mds_9250i:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:mds_9396s:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:mds_9396t:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:mds_9506:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:mds_9509:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:mds_9513:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:mds_9706:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:mds_9710:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:mds_9718:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:* versions from (including) 7.0\(3\)f up to (excluding) 9.2 OR cpe:2.3:h:cisco:n9k-c9504-fm-r:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:n9k-c9508-fm-r:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:n9k-x96136yc-r:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:n9k-x9636c-r:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:n9k-x9636c-rx:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:n9k-x9636q-r:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_36180yc-r:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_3636c-r:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:x96136yc-r:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:x9636c-r:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:x9636c-rx:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:x9636q-r:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:* versions up to (excluding) 7.1\(5\)n1\(1b\) *cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:* versions from (including) 7.3 up to (excluding) 7.3\(5\)n1\(1\) OR cpe:2.3:h:cisco:nexus_5010:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_5020:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_5548p:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_5548up:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_5596t:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_5596up:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_56128p:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_5624q:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_5648q:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_5672up:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_5672up-16g:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_5696q:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_6001:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_6004:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:* versions up to (excluding) 6.2\(22\) *cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:* versions from (including) 7.2 up to (excluding) 7.3\(4\)d1\(1\) *cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:* versions from (including) 8.0 up to (excluding) 8.2\(3\) *cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:* versions from (including) 8.3 up to (excluding) 8.4 OR cpe:2.3:h:cisco:7000_10-slot:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:7000_18-slot:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:7000_4-slot:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:7000_9-slot:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:7700_10-slot:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:7700_18-slot:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:7700_2-slot:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:7700_6-slot:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:n77-f312ck-26:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:n77-f324fq-25:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:n77-f348xp-23:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:n77-f430cq-36:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:n77-m312cq-26l:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:n77-m324fq-25l:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:n77-m348xp-23l:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:n7k-f248xp-25e:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:n7k-f306ck-25:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:n7k-f312fq-25:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:n7k-m202cf-22l:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:n7k-m206fq-23l:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:n7k-m224xp-23l:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:n7k-m324fq-25l:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:n7k-m348xp-25l:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_7000_supervisor_1:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_7000_supervisor_2:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_7000_supervisor_2e:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_7700_supervisor_2e:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_7700_supervisor_3e:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:* versions up to (excluding) 7.0\(3\)i4\(9\) *cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:* versions from (including) 7.0\(3\)i7 up to (excluding) 7.0\(3\)i7\(4\) OR cpe:2.3:h:cisco:n9k-c92160yc-x:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:n9k-c9236c:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:n9k-c9272q:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:n9k-c93180lc-ex:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:n9k-c93180yc-ex:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:n9k-c93180yc-fx:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:n9k-x9732c-ex:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:n9k-x9736c-fx:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_3048:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:* versions from (including) 7.0\(3\)i7 up to (excluding) 7.0\(3\)i7\(6\) *cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:* versions from (including) 9.2 up to (excluding) 9.2\(3\) OR cpe:2.3:h:cisco:nexus_3524-x\/xl:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_3548-x\/xl:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:* versions up to (excluding) 3.2\(3k\) *cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:* versions from (including) 4.0 up to (excluding) 4.0\(2e\) OR cpe:2.3:h:cisco:ucs-6296up:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:ucs_6248up:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:ucs_6324:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:ucs_6332:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:ucs_6332-16up:-:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Aug. 28, 2019
Action Type Old Value New Value Changed 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. 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.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2019-1965 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2019-1965
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.11 }} 0.00%
score
0.42332
percentile