Cisco ASA/Firepower Threat Defense DNS over IPv6 Packet Processor input validation

Summaryinfo

A vulnerability was found in Cisco ASA and Firepower Threat Defense and classified as problematic. Affected is an unknown function of the component DNS over IPv6 Packet Processor. Such manipulation leads to input validation. This vulnerability is uniquely identified as CVE-2020-3191. The attack can be launched remotely. No exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Cisco ASA and Firepower Threat Defense (Firewall Software) (the affected version is unknown). Affected by this issue is an unknown code of the component DNS over IPv6 Packet Processor. The manipulation with an unknown input 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. CVE summarizes:

A vulnerability in DNS over IPv6 packet processing for Cisco Adaptive Security Appliance (ASA) Software and Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause the device to unexpectedly reload, resulting in a denial of service (DoS) condition. The vulnerability is due to improper length validation of a field in an IPv6 DNS packet. An attacker could exploit this vulnerability by sending a crafted DNS query over IPv6, which traverses the affected device. An exploit could allow the attacker to cause the device to reload, resulting in a DoS condition. This vulnerability is specific to DNS over IPv6 traffic only.

The weakness was disclosed 05/06/2020 as cisco-sa-asaftd-ipv6-67pA658k as confirmed advisory (Website). The advisory is available at tools.cisco.com. This vulnerability is handled as CVE-2020-3191 since 12/12/2019. The attack may be launched remotely. No form of authentication is required for exploitation. 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 05/07/2020).

Upgrading eliminates this vulnerability.

The entries VDB-154804, VDB-154803 and VDB-154799 are pretty similar. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

• Firewall Software

Vendor

• Cisco

Name

• ASA
• Firepower Threat Defense

License

• commercial

Website

• Vendor: https://www.cisco.com/

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Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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