Cisco IOS/IOS XE Session Initiation Protocol SIP Message input validation

Summaryinfo

A vulnerability identified as problematic has been detected in Cisco IOS and IOS XE. The impacted element is an unknown function of the component Session Initiation Protocol. The manipulation as part of SIP Message leads to input validation. This vulnerability is listed as CVE-2020-3226. The attack may be initiated remotely. There is no available exploit. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Cisco IOS and IOS XE (Router Operating System) (affected version not known). This issue affects some unknown functionality of the component Session Initiation Protocol. The manipulation as part of a SIP Message leads to a input validation vulnerability. Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Impacted is availability. The summary by CVE is:

A vulnerability in the Session Initiation Protocol (SIP) library of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to trigger a reload of an affected device, resulting in a denial of service (DoS) condition. The vulnerability is due to insufficient sanity checks on received SIP messages. An attacker could exploit this vulnerability by sending crafted SIP messages to an affected device. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a denial of service condition.

The weakness was presented 06/03/2020 as cisco-sa-sip-Cv28sQw2 as confirmed advisory (Website). The advisory is shared at tools.cisco.com. The identification of this vulnerability is CVE-2020-3226 since 12/12/2019. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. 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 06/04/2020).

Upgrading eliminates this vulnerability.

See VDB-156057 and VDB-156052 for similar entries. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• Router Operating System

Vendor

• Cisco

Name

• IOS
• IOS XE

License

• commercial

Website

• Vendor: https://www.cisco.com/

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Entryinfo

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