SB2017110214 - Denial of service in Cisco Aironet
Published: November 2, 2017
Security Bulletin ID
SB2017110214
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
3
Exploitation vector
Adjecent network
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 3 vulnerabilities.
1) Authentication bypass (CVE-ID: CVE-2017-12281)
CWE-ID: CWE-287 - Improper Authentication
CVSSv4: CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows an adjacent attacker to bypass authentication and connect on the target system.
The weakness exists in the implementation of Protected Extensible Authentication Protocol (PEAP) functionality for standalone configurations of Cisco Aironet 1800, 2800, and 3800 Series Access Points due to incorrect default configuration setting of fail open when running in standalone mode. An adjacent attacker can bypass authentication and cause denial of service.
2) Authentication bypass (CVE-ID: CVE-2017-12273)
CWE-ID: CWE-287 - Improper Authentication
CVSSv4: CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a Layer 2 radio frequency (RF) adjacent attacker to bypass authentication and connect on the target system.
The weakness exists in 802.11 association request frame processing for the Cisco Aironet 1560, 2800, and 3800 Series Access Points due to insufficient frame validation of the 802.11 association request. An adjacent attacker can bypass authentication and cause the AP to reload.
Successful exploitation of the vulnerability results in denial of service.
3) Improper input validation (CVE-ID: CVE-2017-12274)
CWE-ID: CWE-287 - Improper Authentication
CVSSv4: CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a Layer 2 radio frequency (RF) adjacent attacker to cause DoS condition on the target system.
The weakness exists in Extensible Authentication Protocol (EAP) ingress frame processing for the Cisco Aironet 1560, 2800, and 3800 Series Access Points due to insufficient validation of the EAP frame. A remote attacker can send a malformed EAP frame and cause the AP to reload.
Successful exploitation of the vulnerability results in denial of service.
Remediation
Install update from vendor's website.