CVE-2021-34761
Last modified
CVE-2021-34761 is a medium-severity vulnerability rated 6/10 on the CVSS scale. 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. EPSS estimates a 0.21% chance of exploitation in the next 30 days.
Description
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.
Metrics
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| 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 |
References
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-34761?
How severe is CVE-2021-34761?
How do I fix CVE-2021-34761?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2021
- CVE-2021-34756Multiple vulnerabilities in the CLI of Cisco Firepower Threa…7.8
- CVE-2021-34757Multiple vulnerabilities in Cisco Business 220 Series Smart …5.5
- CVE-2021-34758A vulnerability in the memory management of Cisco TelePresen…3.3
- CVE-2021-34759A vulnerability in the web-based management interface of Cis…4.8
- CVE-2021-3476A flaw was found in OpenEXR's B44 uncompression functionalit…5.3
- CVE-2021-34760A vulnerability in the web-based management interface of Cis…4.8
- CVE-2021-34762A vulnerability in the web-based management interface of Cis…8.1
- CVE-2021-34763Multiple vulnerabilities in the web-based management interfa…4.8
- CVE-2021-34764Multiple vulnerabilities in the web-based management interfa…6.1
- CVE-2021-34765A vulnerability in the web UI for Cisco Nexus Insights could…4.3
- CVE-2021-34766A vulnerability in the web UI of Cisco Smart Software Manage…8.8
- CVE-2021-34767A vulnerability in IPv6 traffic processing of Cisco IOS XE W…7.4
Are you affected by CVE-2021-34761?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST