Remote code execution in Cisco IP Phone 7800 and 8800 Series

1) Stack-based buffer overflow

EUVDB-ID: #VU70068

Risk: Medium

CVSSv4.0: 6.3 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2022-20968

CWE-ID: CWE-121 - Stack-based buffer overflow

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error when processing Cisco Discovery Protocol packets. A remote attacker on the local network can send specially crafted packets to the affected device, trigger a stack-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

The vendor plans to release firmware upgrade in January 2023.

Vulnerable software versions

IP Phone 7800 Series: 14.1(1) - 14.2

Cisco IP Phone 8800 Series: 14.0.1 SR1 - 14.2

CPE2.3

• cpe:2.3:a:cisco_systems:ip_phone_7800_series:14.1(1):*:*:*:*:*:*:*
• cpe:2.3:a:cisco_systems:ip_phone_7800_series:14.1:*:*:*:*:*:*:*
• cpe:2.3:a:cisco_systems:ip_phone_7800_series:14.2:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:cisco_ip_phone_8800_series:14.0.1 SR1:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:cisco_ip_phone_8800_series:14.0.1 SR2:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:cisco_ip_phone_8800_series:14.0.1:*:*:*:*:*:*:*

External links

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ipp-oobwrite-8cMF5r7U
https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwb28354

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.