Denial of service in Cisco IOS - CVE-2017-3857
Published: March 23, 2017
Vulnerability identifier: #VU6162
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2017-3857
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause DoS conditions.
The vulnerability exists in the Layer 2 Tunneling Protocol (L2TP) parsing function due to insufficient validation of L2TP packets . An attacker can send a specially crafted L2TP packet and cause the affected device to reload.
Successful exploitation of the vulnerability results in denial of service on the vulnerable device.
The vulnerability exists in the Layer 2 Tunneling Protocol (L2TP) parsing function due to insufficient validation of L2TP packets . An attacker can send a specially crafted L2TP packet and cause the affected device to reload.
Successful exploitation of the vulnerability results in denial of service on the vulnerable device.
Affected software
Cisco IOS
How to mitigate CVE-2017-3857
Install update from vendor's website.