Cisco Aironet Control/Provisioning Packet input validation

Summaryinfo

A vulnerability classified as problematic has been found in Cisco Aironet. The impacted element is an unknown function of the component Control/Provisioning. The manipulation as part of Packet leads to input validation. This vulnerability is documented as CVE-2019-1834. The attack requires being on the local network. There is not any exploit available.

Detailsinfo

A vulnerability was found in Cisco Aironet (Wireless LAN Software) (version now known). It has been rated as problematic. This issue affects some unknown processing of the component Control/Provisioning. The manipulation as part of a Packet 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 internal packet processing of Cisco Aironet Series Access Points (APs) could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on an affected AP if the switch interface where the AP is connected has port security configured. The vulnerability exists because the AP forwards some malformed wireless client packets outside of the Control and Provisioning of Wireless Access Points (CAPWAP) tunnel. An attacker could exploit this vulnerability by sending crafted wireless packets to an affected AP. A successful exploit could allow the attacker to trigger a security violation on the adjacent switch port, which could result in a DoS condition. Note: Though the Common Vulnerability Scoring System (CVSS) score corresponds to a High Security Impact Rating (SIR), this vulnerability is considered Medium because a workaround is available and exploitation requires a specific switch configuration. There are workarounds that address this vulnerability.

The bug was discovered 04/17/2019. The weakness was released 04/18/2019 as cisco-sa-20190417-air-ap-dos as confirmed advisory (Website). It is possible to read the advisory at tools.cisco.com. The identification of this vulnerability is CVE-2019-1834 since 12/06/2018. Access to the local network is required for this attack to succeed. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 09/04/2023).

The vulnerability was handled as a non-public zero-day exploit for at least 1 days. During that time the estimated underground price was around $5k-$25k.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Entries connected to this vulnerability are available at VDB-133808 and VDB-133807. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• Wireless LAN Software

Vendor

• Cisco

Name

• Aironet

License

• commercial

Website

• Vendor: https://www.cisco.com/

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Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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