Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Cisco | Aironet 1810 Firmware | >= 8.4, < 8.5.151.0 |
| Cisco | Aironet 1810 | - |
| Cisco | Aironet 1830 Firmware | >= 8.4, < 8.5.151.0 |
| Cisco | Aironet 1830 | - |
| Cisco | Aironet 1850 Firmware | >= 8.4, < 8.5.151.0 |
| Cisco | Aironet 1850 | - |
Related Weaknesses (CWE)
References
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-2Vendor Advisory
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-2Vendor Advisory
FAQ
What is CVE-2019-15261?
CVE-2019-15261 is a vulnerability with a CVSS score of 8.6 (HIGH). 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 aff...
How severe is CVE-2019-15261?
CVE-2019-15261 has been rated HIGH with a CVSS base score of 8.6/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2019-15261?
Check the references section above for vendor advisories and patch information. Affected products include: Cisco Aironet 1810 Firmware, Cisco Aironet 1810, Cisco Aironet 1830 Firmware, Cisco Aironet 1830, Cisco Aironet 1850 Firmware.