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This vulnerability has been modified since it was last analyzed by the NVD. It is awaiting reanalysis which may result in further changes to the information provided.
A vulnerability in the Layer 2 Tunneling Protocol (L2TP) parsing function of Cisco IOS (12.0 through 12.4 and 15.0 through 15.6) and Cisco IOS XE (3.1 through 3.18) could allow an unauthenticated, remote attacker to cause an affected device to reload. The vulnerability is due to insufficient validation of L2TP packets. An attacker could exploit this vulnerability by sending a crafted L2TP packet to an affected device. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a denial of service (DoS) condition. This vulnerability affects Cisco devices that are running a vulnerable release of Cisco IOS or Cisco IOS XE Software if the L2TP feature is enabled for the device and the device is configured as an L2TP Version 2 (L2TPv2) or L2TP Version 3 (L2TPv3) endpoint. By default, the L2TP feature is not enabled. Cisco Bug IDs: CSCuy82078.
Source: MITRE View Analysis Description
Source: MITRE
Base Score: 7.5 HIGH Vector: AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H (V3 legend) Impact Score: 3.6 Exploitability Score: 3.9
Attack Vector (AV): Network Attack Complexity (AC): Low Privileges Required (PR): None User Interaction (UI): None Scope (S): Unchanged Confidentiality (C): None Integrity (I): None Availability (A): High
Base Score: 7.8 HIGH Vector: (AV:N/AC:L/Au:N/C:N/I:N/A:C) (V2 legend) Impact Subscore: 6.9 Exploitability Subscore: 10.0
Access Vector (AV): Network Access Complexity (AC): Low Authentication (AU): None Confidentiality (C): None Integrity (I): None Availability (A): Complete Additional Information: Allows disruption of service
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Vulnerability Type (View All)
http://www.securitytracker.com/id/1038100 [No Types Assigned]
OR *cpe:2.3:o:cisco:ios:12.0\(33\)s:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios:12.0\(33\)s1:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios:12.0\(33\)s10:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios:12.0\(33\)s11:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios:12.0\(33\)s2:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios:12.0\(33\)s3:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios:12.0\(33\)s4:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios:12.0\(33\)s5:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios:12.0\(33\)s6:*:*:*:*:*:*:* *cpe:2.3:o:cis
(AV:N/AC:L/Au:N/C:N/I:N/A:C)
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-399
http://www.securityfocus.com/bid/97010 No Types Assigned
http://www.securityfocus.com/bid/97010 Third Party Advisory, VDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170322-l2tp No Types Assigned
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170322-l2tp VDB Entry
http://www.securityfocus.com/bid/97010 [No Types Assigned]