Remote code execution in Cisco IP Phones
| Risk | High |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2020-3161 |
| CWE-ID | CWE-20 |
| Exploitation vector | Network |
| Public exploit | Vulnerability #1 is being exploited in the wild. |
| Vulnerable software |
Cisco IP Phone 7811 Hardware solutions / Office equipment, IP-phones, print servers Cisco IP Phone 7821 Hardware solutions / Office equipment, IP-phones, print servers Cisco IP Phone 7841 Hardware solutions / Office equipment, IP-phones, print servers Cisco IP Phone 7861 Hardware solutions / Office equipment, IP-phones, print servers Cisco IP Phone 8811 Hardware solutions / Office equipment, IP-phones, print servers Cisco IP Phone 8841 Hardware solutions / Office equipment, IP-phones, print servers Cisco Wireless IP Phone 8845 Hardware solutions / Office equipment, IP-phones, print servers Cisco Wireless IP Phone 8851 Hardware solutions / Office equipment, IP-phones, print servers Cisco Unified IP Conference Phone 8831 Hardware solutions / Office equipment, IP-phones, print servers Cisco Wireless IP Phone 8821 Hardware solutions / Office equipment, IP-phones, print servers Cisco Wireless IP Phone 8821-EX Hardware solutions / Office equipment, IP-phones, print servers Cisco IP Phone 8861 Hardware solutions / Routers & switches, VoIP, GSM, etc Cisco IP Phone 8865 Hardware solutions / Routers & switches, VoIP, GSM, etc |
| Vendor | Cisco Systems, Inc |
Security Bulletin
This security bulletin contains one high risk vulnerability.
1) Input validation error
EUVDB-ID: #VU26976
Risk: High
CVSSv4.0: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Amber]
CVE-ID: CVE-2020-3161
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: Yes
DescriptionThe vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to insufficient validation of user-supplied input of HTTP requests in the web server for Cisco IP Phones. A remote attacker can send a specially crafted HTTP request and execute arbitrary code with root privileges or cause a reload of an affected IP phone, resulting in a (DoS) condition.
MitigationInstall updates from vendor's website.
Vulnerable software versionsCisco IP Phone 7811: 11.0.1
Cisco IP Phone 7821: 11.0.1
Cisco IP Phone 7841: 11.0.1
Cisco IP Phone 7861: 11.0.1
Cisco IP Phone 8811: 11.0.1
Cisco IP Phone 8841: 11.0.1
Cisco Wireless IP Phone 8845: 11.0.1
Cisco Wireless IP Phone 8851: 11.0.1
Cisco IP Phone 8861: 11.0.1
Cisco IP Phone 8865: 11.0.1
Cisco Unified IP Conference Phone 8831: 10.3.1 ES14
Cisco Wireless IP Phone 8821: 11.0.5 SR1
Cisco Wireless IP Phone 8821-EX: 11.0.5 SR1
CPE2.3- cpe:2.3:h:cisco_systems:cisco_ip_phone_7811:11.0.1:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:cisco_ip_phone_7821:11.0.1:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:cisco_ip_phone_7841:11.0.1:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:cisco_ip_phone_7861:11.0.1:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:cisco_ip_phone_8811:11.0.1:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:cisco_ip_phone_8841:11.0.1:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:cisco_wireless_ip_phone_8845:11.0.1:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:cisco_wireless_ip_phone_8851:11.0.1:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:cisco_ip_phone_8861:11.0.1:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:cisco_ip_phone_8865:11.0.1:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:cisco_unified_ip_conference_phone_8831:10.3.1 ES14:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:cisco_wireless_ip_phone_8821:11.0.5 SR1:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:cisco_wireless_ip_phone_8821-ex:11.0.5 SR1:*:*:*:*:*:*:*
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
How the attacker can exploit this vulnerability?
The attacker would have to send a specially crafted request to the affected device in order to exploit this vulnerability.
Is there known malware, which exploits this vulnerability?
Yes. This vulnerability is being exploited in the wild.
