Arbitrary File Read and Write in Cisco FXOS Software
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2020-3166 |
| CWE-ID | CWE-20 |
| Exploitation vector | Local |
| Public exploit | N/A |
| Vulnerable software Subscribe |
Cisco FXOS Operating systems & Components / Operating system Cisco Adaptive Security Appliance (ASA) Hardware solutions / Security hardware applicances Cisco Firepower Threat Defense (FTD) Hardware solutions / Security hardware applicances |
| Vendor | Cisco Systems, Inc |
Security Bulletin
This security bulletin contains one low risk vulnerability.
1) Input validation error
EUVDB-ID: #VU25656
Risk: Low
CVSSv3.1: 3.7 [CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-3166
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: No
Description
The vulnerability allows a local user to read or write arbitrary files on the target system.
The vulnerability exists due to insufficient validation of user-supplied input. A local user can include specially crafted arguments to a specific CLI command and read or write to arbitrary files on the underlying OS.
This vulnerability affects the following Cisco products if they are running a vulnerable release of Cisco FXOS Software:
- Firepower 1000 Series
- Firepower 2100 Series
- Firepower 4100 Series
- Firepower 9300 Security Appliances
Mitigation
Install updates from vendor's website.
Vulnerable software versionsCisco FXOS: 2.2 - 2.6
Cisco Adaptive Security Appliance (ASA): 9.8 - 9.13
Cisco Firepower Threat Defense (FTD): 6.2.2 - 6.5.0
External linkshttp://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200226-fxos-cli-file
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
