bugtraq - Cisco Security Advisory: Cisco IOS and IOS XE Software Layer 2 Tunneling Protocol Denial of Service Vulnerability

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [day] [month] [year] [list]

Message-ID: 201703221613.5.l2tp
Date: 22 Mar 2017 11:13:40 -0500
From: psirt@...co.com
To: bugtraq@...urityfocus.com
Cc: psirt@...co.com
Subject: Cisco Security Advisory: Cisco IOS and IOS XE Software Layer 2
 Tunneling Protocol Denial of Service Vulnerability

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Cisco Security Advisory: Cisco IOS and IOS XE Software Layer 2 Tunneling Protocol Denial of Service Vulnerability

Advisory ID: cisco-sa-20170322-l2tp

Revision: 1.0

For Public Release: 2017 March 22 16:00 GMT

Last Updated: 2017 March 22 16:00 GMT

CVE ID(s): CVE-2017-3857

CVSS Score v(3): 8.6 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

+---------------------------------------------------------------------

Summary
=======
A vulnerability in the Layer 2 Tunneling Protocol (L2TP) parsing function of Cisco IOS and Cisco IOS XE Software 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.
Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

This advisory is available at the following link:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170322-l2tp ["https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170322-l2tp"]

This advisory is part of the March 22, 2017, release of the Cisco IOS and IOS XE Software Security Advisory Bundled Publication, which includes five Cisco Security Advisories that describe five vulnerabilities. All the vulnerabilities have a Security Impact Rating of High. For a complete list of the advisories and links to them, see Cisco Event Response: March 2017 Semiannual Cisco IOS and IOS XE Software Security Advisory Bundled Publication ["http://tools.cisco.com/security/center/viewErp.x?alertId=ERP-60851"].

-----BEGIN PGP SIGNATURE-----
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=LLYg
-----END PGP SIGNATURE-----