PT-2019-3591 · Cisco · Cisco Aironet Access Points

Published 2019-10-16 · Updated 2019-10-22 · CVE-2019-15261

Positive Technologies (AI Summary)

CVSS v3.1

8.6

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Cisco Aironet Access Points versions (affected versions not specified)

Description A vulnerability in the Point-to-Point Tunneling Protocol (PPTP) VPN packet processing functionality could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition. The vulnerability is due to insufficient validation of Generic Routing Encapsulation (GRE) frames that pass through the data plane of an affected AP. An attacker could exploit this vulnerability by associating to a vulnerable AP, initiating a PPTP VPN connection to an arbitrary PPTP VPN server, and sending a malicious GRE frame through the data plane of the AP. A successful exploit could allow the attacker to cause an internal process of the targeted AP to crash, which in turn would cause the AP to reload.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

RCE

Weakness Enumeration

CWE-20

Related Identifiers

BDU:2019-03800

CVE-2019-15261

Affected Products

Cisco Aironet Access Points

References · 4

• https://osv.dev/vulnerability/CVE-2019-15261 · Vendor Advisory
• https://bdu.fstec.ru/vul/2019-03800 · Security Note
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20191016-airo-pptp-dos · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2019-15261 · Security Note