CVE-2019-1836
CVSS V2 Medium 6.6
CVSS V3 High 7.1
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).
Overview
- CVE ID
- CVE-2019-1836
- Assigner
- ykramarz@cisco.com
- Vulnerability Status
- Analyzed
- Published Version
- 2019-05-03T17:29:01
- Last Modified Date
- 2020-10-13T20:27:27
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| AND | ||||
| cpe:2.3:o:cisco:nx-os:14.0\(3d\):*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:h:cisco:nexus_9300:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:nexus_9500:-:*:*:*:*:*:*:* | 0 | OR |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:L/AC:L/Au:N/C:N/I:C/A:C
- Access Vector
- LOCAL
- Access Compatibility
- LOW
- Authentication
- NONE
- Confidentiality Impact
- NONE
- Integrity Impact
- COMPLETE
- Availability Impact
- COMPLETE
- Base Score
- 6.6
- Severity
- MEDIUM
- Exploitability Score
- 3.9
- Impact Score
- 9.2
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
- Attack Vector
- LOCAL
- Attack Compatibility
- LOW
- Privileges Required
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- NONE
- Availability Impact
- HIGH
- Base Score
- 7.1
- Base Severity
- HIGH
- Exploitability Score
- 1.8
- Impact Score
- 5.2
References
| Reference URL | Reference Tags |
|---|---|
| https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190501-fabric-traversal | Vendor Advisory |
| http://www.securityfocus.com/bid/108150 | Third Party Advisory VDB Entry |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2019-1836 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-1836 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 17:09:03 | Added to TrackCVE | |||
| 2022-12-03 20:21:18 | psirt@cisco.com | ykramarz@cisco.com | CVE Assigner | updated |
| 2022-12-03 20:21:19 | 2019-05-03T17:29Z | 2019-05-03T17:29:01 | CVE Published Date | updated |
| 2022-12-03 20:21:19 | 2020-10-13T20:27:27 | CVE Modified Date | updated | |
| 2022-12-03 20:21:19 | Analyzed | Vulnerability Status | updated |