Remote code execution in Cisco IP Phones
Security Bulletin
This security bulletin contains one high risk vulnerability.
1) Input validation error
EUVDB-ID: #VU26976
Risk: High
CVSSv3.1: 9.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C]
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
External linksQ & 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.
