Cisco NX-OS CLI file overwrite

cisco-nxos-cve20124122-file-overwrite (87672) The risk level is classified as MediumMedium Risk

Description:

Cisco NX-OS could allow a local authenticated attacker to overwrite arbitrary files on the system, caused by the improper filtering of input by the command-line interface (CLI) parser. An attacker could exploit this vulnerability using a shell output redirection to create or overwrite arbitrary files on the system.

*CVSS:

Base Score: 4.6
  Access Vector: Local
  Access Complexity: Low
  Authentication: Single
  Confidentiality Impact: None
  Integrity Impact: Complete
  Availability Impact: None
 
Temporal Score: 3.4
  Exploitability: Unproven
  Remediation Level: Official-Fix
  Report Confidence: Confirmed

Consequences:

File Manipulation

Remedy:

Refer to Cisco Security Notice for patch, upgrade or suggested workaround information. See References.

References:

  • Cisco Security Notice: Cisco NX-OS Software Input Validation Vulnerability.
  • BID-62843: Cisco NX-OS CVE-2012-4122 Arbitrary File Creation or Overwrite Vulnerability
  • CVE-2012-4122: The CLI parser in Cisco NX-OS allows local users to bypass intended access restrictions, and overwrite or create arbitrary files, via shell output redirection, aka Bug IDs CSCts56672 and CSCts56669.
  • OSVDB ID: 98121: Cisco NX-OS CLI Parser Unspecified Output Redirect Arbitrary File Overwrite

Platforms Affected:

  • Cisco NX-OS

Reported:

Oct 04, 2013

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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.

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