Cisco IP Phone 6800/IP Phone 7800/IP Phone 8800 up to 12.0.4 Web-based Management Interface out-of-bounds write

Summaryinfo

A vulnerability, which was classified as critical, has been found in Cisco IP Phone 6800, IP Phone 7800 and IP Phone 8800. Affected is an unknown function of the component Web-based Management Interface. Performing a manipulation results in out-of-bounds write. This vulnerability is reported as CVE-2024-20376. The attack is possible to be carried out remotely. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, was found in Cisco IP Phone 6800, IP Phone 7800 and IP Phone 8800. This affects an unknown functionality of the component Web-based Management Interface. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. CWE is classifying the issue as CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. This is going to have an impact on availability. The summary by CVE is:

A vulnerability in the web-based management interface of Cisco IP Phone firmware could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a DoS condition. This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by sending a crafted request to the web-based management interface of an affected device. A successful exploit could allow the attacker to cause the affected device to reload.

It is possible to read the advisory at sec.cloudapps.cisco.com. This vulnerability is uniquely identified as CVE-2024-20376 since 11/08/2023. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 01/05/2026).

Upgrading eliminates this vulnerability.

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• IP Phone Software

Vendor

• Cisco

Name

• IP Phone 6800
• IP Phone 7800
• IP Phone 8800

Version

• 4.5
• 4.6
• 4.7.1
• 4.8.1
• 5.0.1
• 5.1
• 5.1.1
• 5.1.2
• 11.0.0
• 11.0.1
• 11.0.2
• 11.1.1
• 11.1.2
• 11.2.1
• 11.2.2
• 11.2.3
• 11.2.4
• 11.3.1
• 11.3.2
• 11.3.3
• 11.3.4
• 11.3.5
• 11.3.6
• 11.3.6SR1
• 11.3.7
• 11.3.7SR1
• 11.3.7SR2
• 12.0.1
• 12.0.2
• 12.0.3
• 12.0.3SR1
• 12.0.4

License

• commercial

Website

• Vendor: https://www.cisco.com/

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Be aware that VulDB is the high quality source for vulnerability data.

Discussion