CVE-2021-34761: Cisco Firepower Threat Defense Software CLI Arbitrary File Write Vulnerability
First published: Wed Oct 27 2021(Updated: )
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.
Credit: ykramarz@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco Firepower Management Center Virtual Appliance | =6.2.3 | |
| Cisco Firepower Management Center Virtual Appliance | =6.4.0 | |
| Cisco Firepower Management Center Virtual Appliance | =6.6.1 | |
| Cisco Firepower Management Center Virtual Appliance | =6.7.0 | |
| Cisco Firepower Management Center Virtual Appliance | =7.0.0 | |
| Cisco Firepower Management Center Virtual Appliance | =7.1.0 | |
| Cisco Firepower Threat Defense | >=6.4.0<6.4.0.13 | |
| Cisco Firepower Threat Defense | >=6.6.0<6.6.5 | |
| Cisco Firepower Threat Defense | >=6.7.0<6.7.0.3 | |
| Cisco Firepower Threat Defense | >=7.0.0<7.0.1 | |
| Cisco Sourcefire Defense Center | =6.2.3 | |
| Cisco Sourcefire Defense Center | =6.4.0 | |
| Cisco Sourcefire Defense Center | =6.6.1 | |
| Cisco Sourcefire Defense Center | =6.7.0 | |
| Cisco Sourcefire Defense Center | =7.0.0 | |
| Cisco Sourcefire Defense Center | =7.1.0 |
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Reference Links
Frequently Asked Questions
What is the vulnerability ID of this Cisco Firepower Threat Defense Software vulnerability?
The vulnerability ID is CVE-2021-34761.
What is the severity of CVE-2021-34761?
The severity of CVE-2021-34761 is medium (6).
How does CVE-2021-34761 affect Cisco Firepower Management Center Virtual Appliance?
CVE-2021-34761 affects Cisco Firepower Management Center Virtual Appliance versions 6.2.3, 6.4.0, 6.6.1, 6.7.0, 7.0.0, and 7.1.0.
How does CVE-2021-34761 affect Cisco Firepower Threat Defense?
CVE-2021-34761 affects Cisco Firepower Threat Defense versions 6.4.0.0 to 6.4.0.13, 6.6.0.0 to 6.6.5, 6.7.0.0 to 6.7.0.3, and 7.0.0.0 to 7.0.1.
How can I fix CVE-2021-34761 vulnerability?
To fix the CVE-2021-34761 vulnerability, apply the relevant security patch provided by Cisco.
- collector/nvd-index
- agent/weakness
- agent/type
- agent/softwarecombine
- collector/mitre-cve
- source/MITRE
- agent/author
- agent/severity
- agent/title
- agent/last-modified-date
- agent/references
- agent/tags
- agent/description
- agent/first-publish-date
- agent/event
- vendor/cisco
- canonical/cisco firepower management center virtual appliance
- version/cisco firepower management center virtual appliance/6.2.3
- version/cisco firepower management center virtual appliance/6.4.0
- version/cisco firepower management center virtual appliance/6.6.1
- version/cisco firepower management center virtual appliance/6.7.0
- version/cisco firepower management center virtual appliance/7.0.0
- version/cisco firepower management center virtual appliance/7.1.0
- canonical/cisco firepower threat defense
- version/cisco firepower threat defense/6.4.0
- version/cisco firepower threat defense/6.6.0
- version/cisco firepower threat defense/6.7.0
- version/cisco firepower threat defense/7.0.0
- canonical/cisco sourcefire defense center
- version/cisco sourcefire defense center/6.2.3
- version/cisco sourcefire defense center/6.4.0
- version/cisco sourcefire defense center/6.6.1
- version/cisco sourcefire defense center/6.7.0
- version/cisco sourcefire defense center/7.0.0
- version/cisco sourcefire defense center/7.1.0