Executive Summary

Summary
Title Cisco IOS XE Software Locator/ID Separation Protocol Authentication Bypass Vulnerability
Informations
Name cisco-sa-20170927-lisp First vendor Publication 2017-09-27
Vendor Cisco Last vendor Modification 2017-09-27
Severity (Vendor) N/A Revision N/A

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
 
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:L/Au:N/C:P/I:P/A:P)
Cvss Base Score 7.5 Attack Range Network
Cvss Impact Score 6.4 Attack Complexity Low
Cvss Expoit Score 10 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

A vulnerability in the implementation of the Locator/ID Separation Protocol (LISP) in Cisco IOS XE Software could allow an unauthenticated, remote attacker using an x tunnel router to bypass authentication checks performed when registering an Endpoint Identifier (EID) to a Routing Locator (RLOC) in the map server/map resolver (MS/MR).

The vulnerability is due to a logic error introduced via a code regression for the affected software. An attacker could exploit this vulnerability by sending specific valid map-registration requests, which will be accepted by the MS/MR even if the authentication keys do not match, to the affected software. A successful exploit could allow the attacker to inject invalid mappings of EIDs to RLOCs in the MS/MR of the affected software.

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-20170927-lisp ["https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170927-lisp"]

This advisory is part of the September 27, 2017, release of the Cisco IOS and IOS XE Software Security Advisory Bundled Publication, which includes 12 Cisco Security Advisories that describe 13 vulnerabilities. For a complete list of the advisories and links to them, see Cisco Event Response: September 2017 Semiannual Cisco IOS and IOS XE Software Security Advisory Bundled Publication ["https://tools.cisco.com/security/center/viewErp.x?alertId=ERP-63410"].

BEGIN PGP SIGNATURE

iQKBBAEBAgBrBQJZy81/ZBxDaXNjbyBTeXN0ZW1zIFByb2R1Y3QgU2VjdXJpdHkg SW5jaWRlbnQgUmVzcG9uc2UgVGVhbSAoQ2lzY28gUFNJUlQga2V5IDIwMTYtMjAx NykgPHBzaXJ0QGNpc2NvLmNvbT4ACgkQrz2APcQAkHki7w//Y9htlcyaKuEy1jin p456PwWEi706Z8VdbUuPEIVy3k04CGGB/VZDg6JRwgjPodYysTWbH9Pbj7mCbJ7U vWjdvlm1thDk2FX40BRxUvlTkR5j6zM+0DvPMN9/NImJwe+d9lGgOkIZvhW3SGyr Ta/AMe25e9cS3cpeemR4F/JFw0eeiwlizJ7bDACegvOGWnJJnsGejekHhAl7o4ey QaIW86yjaAyx49VgX+EE6YrpufM1oyW1ZYYZCVA3oUDM3EHwdGKk3vE2QjT67uZQ F78BFr4uXX4TSyPs+wVuUa24TmPWyzXgl5eSA3d63/xtWBjtuOk8UDE9eCXo9udX D2qmf9SjgOZVqHa2k7K72z02udpffbRv+VC/V1ciTqep/c3L4v+6wpTUkdJXI7we E9D4tbNKhuvRU4f2RWIjZhMu+y9V6JSfAW9/AI8yL38vTmUCS82mZPYllOOOSDGH HkJvCBk7aElbHiU7t6wdhPNrnZ8D1BOvPCC40rLmfm35Y7CxHIv2zHRPtz8IfIID gRs23+CxPc0Yx1lNcWO/gHcXlwXJ5wDb01ZTjzLMrV4KNz7j3m7ixMRHKueBr+U8 p3mIYkG/rSXhoV0DWq33P3KuiPCI/YfbAfxdk1FwoYODSC+JJhBubBwF8roc8w8U YrWnEEA5933oUPsr92D6HlvE+u8= =TBum END PGP SIGNATURE

_______________________________________________ cust-security-announce mailing list cust-security-announce@cisco.com To unsubscribe, send the command "unsubscribe" in the subject of your message to cust-security-announce-leave@cisco.com

Original Source

Url : http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco (...)

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-287 Improper Authentication

CPE : Common Platform Enumeration

TypeDescriptionCount
Os 3

Nessus® Vulnerability Scanner

Date Description
2017-10-06 Name : The remote device is missing a vendor-supplied security patch.
File : cisco-sa-20170927-lisp-ios_xe.nasl - Type : ACT_GATHER_INFO

Alert History

If you want to see full details history, please login or register.
0
1
2
3
Date Informations
2017-10-07 13:25:06
  • Multiple Updates
2017-10-07 00:24:30
  • Multiple Updates
2017-09-29 09:26:02
  • Multiple Updates
2017-09-27 21:23:05
  • First insertion