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cveCiscoCVE-2019-1836
HistoryMay 03, 2019 - 5:29 p.m.

CVE-2019-1836

2019-05-0317:29:01
CWE-22
CWE-59
cisco
web.nvd.nist.gov
35
cisco
nexus
fabric switches
vulnerability
cve-2019-1836
aci
symbolic links
system files
exploitation
software patch

CVSS2

6.6

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:L/AC:L/Au:N/C:N/I:C/A:C

CVSS3

7.1

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

AI Score

6.6

Confidence

High

EPSS

0

Percentile

9.9%

JSON

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).

Affected configurations

Nvd
Vulners
Node
cisconx-osMatch14.0\(3d\)
AND
cisconexus_9300Match-
OR
cisconexus_9500Match-
VendorProductVersionCPE
cisconx-os14.0(3d)cpe:2.3:o:cisco:nx-os:14.0\(3d\):*:*:*:*:*:*:*
cisconexus_9300-cpe:2.3:h:cisco:nexus_9300:-:*:*:*:*:*:*:*
cisconexus_9500-cpe:2.3:h:cisco:nexus_9500:-:*:*:*:*:*:*:*

CNA Affected

[
  {
    "product": "Cisco NX-OS Software for Nexus 9000 Series Fabric Switches ACI Mode",
    "vendor": "Cisco",
    "versions": [
      {
        "lessThan": "14.1(1i)",
        "status": "affected",
        "version": "unspecified",
        "versionType": "custom"
      }
    ]
  }
]

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CVSS2

6.6

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:L/AC:L/Au:N/C:N/I:C/A:C

CVSS3

7.1

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

AI Score

6.6

Confidence

High

EPSS

0

Percentile

9.9%

JSON
Related for CVE-2019-1836
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