Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2019-15261

Severity CVSS v4.0:
Pending analysis
Type:
CWE-20 Input Validation
Publication date:
16/10/2019
Last modified:
22/10/2019

Description

A vulnerability in the Point-to-Point Tunneling Protocol (PPTP) VPN packet processing functionality in Cisco Aironet Access Points (APs) 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. The AP reload would cause a DoS condition for clients that are associated with the AP.

Impact

Vector 3.x
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 8.60 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Changed
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x
8.60
Severity 3.x
HIGH
Vector 2.0
AV:N/AC:L/Au:N/C:N/I:N/A:C CVSS v2.0 Severity and Metrics:

Base Score: 7.80 HIGH
Vector: AV:N/AC:L/Au:N/C:N/I:N/A:C

Attack Vector (AV): Network
Attack Complexity (AC): Low
Authentication (Au): None
Confidentiality (C): None
Integrity (I): None
Availability (A): Complete

Base Score 2.0
7.80
Severity 2.0
HIGH

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:cisco:aironet_1810_firmware:*:*:*:*:*:*:*:* 8.4 (including) 8.5.151.0 (excluding)
cpe:2.3:o:cisco:aironet_1810_firmware:*:*:*:*:*:*:*:* 8.8 (including) 8.8.125.0 (excluding)
cpe:2.3:o:cisco:aironet_1810_firmware:*:*:*:*:*:*:*:* 8.9 (including) 8.9.111.0 (excluding)
cpe:2.3:h:cisco:aironet_1810:-:*:*:*:*:*:*:*
cpe:2.3:o:cisco:aironet_1830_firmware:*:*:*:*:*:*:*:* 8.4 (including) 8.5.151.0 (excluding)
cpe:2.3:o:cisco:aironet_1830_firmware:*:*:*:*:*:*:*:* 8.8 (including) 8.8.125.0 (excluding)
cpe:2.3:o:cisco:aironet_1830_firmware:*:*:*:*:*:*:*:* 8.9 (including) 8.9.111.0 (excluding)
cpe:2.3:h:cisco:aironet_1830:-:*:*:*:*:*:*:*
cpe:2.3:o:cisco:aironet_1850_firmware:*:*:*:*:*:*:*:* 8.4 (including) 8.5.151.0 (excluding)
cpe:2.3:o:cisco:aironet_1850_firmware:*:*:*:*:*:*:*:* 8.8 (including) 8.8.125.0 (excluding)
cpe:2.3:o:cisco:aironet_1850_firmware:*:*:*:*:*:*:*:* 8.9 (including) 8.9.111.0 (excluding)
cpe:2.3:h:cisco:aironet_1850:-:*:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools