Cisco SPA300/SPA500 up to 7.6.2SR7 Web-based Management Interface buffer overflow

Summaryinfo

A vulnerability has been found in Cisco SPA300 and SPA500 and classified as critical. This affects an unknown part of the component Web-based Management Interface. This manipulation causes buffer overflow. This vulnerability appears as CVE-2024-20451. The attack may be initiated remotely. There is no available exploit. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Cisco SPA300 and SPA500. It has been declared as critical. Affected by this vulnerability is an unknown part of the component Web-based Management Interface. The manipulation with an unknown input leads to a buffer overflow vulnerability. The CWE definition for the vulnerability is CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. As an impact it is known to affect availability. The summary by CVE is:

Multiple vulnerabilities in the web-based management interface of Cisco Small Business SPA300 Series IP Phones and Cisco Small Business SPA500 Series IP Phones could allow an unauthenticated, remote attacker to cause an affected device to reload unexpectedly. These vulnerabilities exist because HTTP packets are not properly checked for errors. An attacker could exploit this vulnerability by sending a crafted HTTP packet to the remote interface of an affected device. A successful exploit could allow the attacker to cause a DoS condition on the device.

The advisory is shared at sec.cloudapps.cisco.com. This vulnerability is known as CVE-2024-20451 since 11/08/2023. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 08/24/2024).

Upgrading eliminates this vulnerability.

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Productinfo

Vendor

• Cisco

Name

• SPA300
• SPA500

Version

• 1.0.17
• 7.3.7
• 7.4.3
• 7.4.4
• 7.4.6
• 7.4.7
• 7.4.8
• 7.4.9
• 7.5.1
• 7.5.2
• 7.5.2a
• 7.5.2b
• 7.5.3
• 7.5.4
• 7.5.5
• 7.5.5a
• 7.5.5b
• 7.5.6
• 7.5.6(XU)
• 7.5.6a
• 7.5.6c
• 7.5.7
• 7.5.7s
• 7.6.0
• 7.6.1
• 7.6.2
• 7.6.2SR1
• 7.6.2SR2
• 7.6.2SR3
• 7.6.2SR4
• 7.6.2SR5
• 7.6.2SR6
• 7.6.2SR7

License

• commercial

Website

• Vendor: https://www.cisco.com/

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