CVE-2019-1836
"Cisco Nexus 9000 Fabric Switches Symbolic Link File Overwrite Vulnerability"
Description
A vulnerability in the system shell for Cisco Nexus 9000 Series Fabric Switches in Application Centric Infrastructure (ACI) mode could allow an authenticated, local attacker to use symbolic links to overwrite system files. These system files may be sensitive and should not be overwritable by non-root users. The attacker would need valid device credentials. The vulnerability is due to incorrect symbolic link verification of directory paths when they are used in the system shell. An attacker could exploit this vulnerability by authenticating to the device and providing crafted user input to specific symbolic link CLI commands. Successful exploitation could allow the attacker to overwrite system files that should be restricted. This vulnerability has been fixed in software version 14.1(1i).
INFO
Published Date :
May 3, 2019, 5:29 p.m.
Last Modified :
Oct. 13, 2020, 8:27 p.m.
Source :
[email protected]
Remotely Exploitable :
No
Impact Score :
5.2
Exploitability Score :
1.8
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-2019-1836.
| URL | Resource |
|---|---|
| http://www.securityfocus.com/bid/108150 | Third Party Advisory VDB Entry |
| https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190501-fabric-traversal | 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).
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The following list is the news that have been mention
CVE-2019-1836 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2019-1836 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. 13, 2020
Action Type Old Value New Value Removed CVSS V3 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H Removed CWE NIST CWE-22 Added CWE NIST CWE-59 -
CVE Modified by [email protected]
Oct. 09, 2019
Action Type Old Value New Value Added CVSS V3 Cisco Systems, Inc. AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N Added CWE Cisco Systems, Inc. CWE-22 -
Initial Analysis by [email protected]
May. 06, 2019
Action Type Old Value New Value Added CVSS V2 (AV:L/AC:L/Au:N/C:N/I:C/A:C) Added CVSS V3 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N Changed Reference Type https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190501-fabric-traversal No Types Assigned https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190501-fabric-traversal Vendor Advisory Changed Reference Type http://www.securityfocus.com/bid/108150 No Types Assigned http://www.securityfocus.com/bid/108150 Third Party Advisory, VDB Entry Added CWE CWE-22 Added CPE Configuration AND OR *cpe:2.3:o:cisco:nx-os:14.0\(3d\):*:*:*:*:*:*:* OR cpe:2.3:h:cisco:nexus_9300:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_9500:-:*:*:*:*:*:*:* -
CVE Modified by [email protected]
May. 06, 2019
Action Type Old Value New Value Added Reference http://www.securityfocus.com/bid/108150 [No Types Assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2019-1836 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-2019-1836
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.04 }} 0.00%
score
0.07978
percentile