Cisco Small Business RV Router up to 4.2.3.14 Web-based Management Interface heap-based overflow

Summaryinfo

A vulnerability labeled as critical has been found in Cisco Small Business RV Router. Impacted is an unknown function of the component Web-based Management Interface. Such manipulation leads to heap-based overflow. This vulnerability is documented as CVE-2024-20516. The attack can be executed remotely. There is not any exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Cisco Small Business RV Router and classified as critical. Affected by this issue is an unknown part of the component Web-based Management Interface. The manipulation with an unknown input leads to a heap-based overflow vulnerability. Using CWE to declare the problem leads to CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). Impacted is availability. CVE summarizes:

A vulnerability in the web-based management interface of Cisco Small Business RV042, RV042G, RV320, and RV325 Routers could allow an authenticated, Administrator-level, remote attacker to cause an unexpected reload of an affected device, resulting in a denial of service (DoS) condition. To exploit this vulnerability, an attacker would need to have valid Administrator credentials on the affected device.   This vulnerability is due to improper validation of user input that is in incoming HTTP packets. An attacker could exploit this vulnerability by sending a crafted HTTP request to the web-based management interface of the affected device. A successful exploit could allow the attacker to cause an unexpected reload of the device, resulting in a DoS condition.

The advisory is available at sec.cloudapps.cisco.com. This vulnerability is handled as CVE-2024-20516 since 11/08/2023. The exploitation is known to be easy. The attack may be launched remotely. The exploitation needs additional levels of successful authentication. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 10/05/2024).

Upgrading eliminates this vulnerability.

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Productinfo

Type

• Router Operating System

Vendor

• Cisco

Name

• Small Business RV Router

Version

• 1.0.1.17
• 1.0.2.03
• 1.1.0.09
• 1.1.1.06
• 1.1.1.19
• 1.2.1.13
• 1.2.1.14
• 1.3.1.10
• 1.3.1.12
• 1.3.2.02
• 1.3.12.6-tm
• 1.3.12.19-tm
• 1.3.13.02-tm
• 1.4.2.15
• 1.4.2.17
• 1.4.2.19
• 1.4.2.20
• 1.4.2.22
• 1.5.1.05
• 1.5.1.11
• 1.5.1.13
• 3.0.0.1-tm
• 3.0.0.19-tm
• 3.0.2.01-tm
• 4.0.0.7
• 4.0.2.08-tm
• 4.0.3.03-tm
• 4.0.4.02-tm
• 4.1.0.02-tm
• 4.1.1.01
• 4.2.1.02
• 4.2.2.08
• 4.2.3.03
• 4.2.3.06
• 4.2.3.07
• 4.2.3.08
• 4.2.3.09
• 4.2.3.10
• 4.2.3.14

License

• commercial

Website

• Vendor: https://www.cisco.com/

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