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CVE-2021-34761 (GCVE-0-2021-34761)

Vulnerability from cvelistv5 – Published: 2021-10-27 18:55 – Updated: 2024-11-07 21:44
VLAI
Title
Cisco Firepower Threat Defense Software CLI Arbitrary File Write Vulnerability
Summary
A vulnerability in Cisco Firepower Threat Defense (FTD) Software could allow an authenticated, local attacker to overwrite or append arbitrary data to system files using root-level privileges. The attacker must have administrative credentials on the device. This vulnerability is due to incomplete validation of user input for a specific CLI command. An attacker could exploit this vulnerability by authenticating to the device with administrative privileges and issuing a CLI command with crafted user parameters. A successful exploit could allow the attacker to overwrite or append arbitrary data to system files using root-level privileges.
Severity
4.4 (Medium)
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-11-07 21:39 UTC
CWE
Assigner
References
URL Tags
https://tools.cisco.com/security/center/content/C… vendor-advisoryx_refsource_CISCO
Impacted products
Vendor Product Version CPE status
Cisco Cisco Firepower Threat Defense Software Affected: n/a
guessed Create a notification for this product.
Date Public
2021-10-27 00:00
Show details on NVD website
To clipboard 

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    "redhat_vex": {
      "current_release_date": "2026-03-27T13:54:37+00:00",
      "cve": "CVE-2021-34761",
      "id": "CVE-2021-34761",
      "initial_release_date": "2021-10-27T00:00:00+00:00",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "Cisco Firepower Threat Defense Software CLI Arbitrary File Write Vulnerability",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-34761.json",
      "version": "3"
    },
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      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.