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CiscoCVE-2017-12236

HistorySep 29, 2017 - 1:34 a.m.

CVE-2017-12236

2017-09-2901:34:48

CWE-287

cisco

web.nvd.nist.gov

vulnerability

implementation

locator/id separation protocol

lisp

cisco

ios xe

authentication bypass

remote attacker

cisco bug ids

cscvc18008

CVSS2

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS3

9.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

AI Score

9.6

Confidence

High

EPSS

0.002

Percentile

64.5%

JSON

A vulnerability in the implementation of the Locator/ID Separation Protocol (LISP) in Cisco IOS XE 3.2 through 16.5 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. This vulnerability affects Cisco devices that are configured with LISP acting as an IPv4 or IPv6 map server. This vulnerability affects Cisco IOS XE Software release trains 3.9E and Everest 16.4. Cisco Bug IDs: CSCvc18008.

Affected configurations

Nvd

Node

ciscoios_xeMatch3.2.0ja

ciscoios_xeMatch3.9.1e

ciscoios_xeMatch16.5.1c

VendorProductVersionCPE
ciscoios_xe3.2.0jacpe:2.3:o:cisco:ios_xe:3.2.0ja:*:*:*:*:*:*:*
ciscoios_xe3.9.1ecpe:2.3:o:cisco:ios_xe:3.9.1e:*:*:*:*:*:*:*
ciscoios_xe16.5.1ccpe:2.3:o:cisco:ios_xe:16.5.1c:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
cisco	ios_xe	3.2.0ja	cpe:2.3:o:cisco:ios_xe:3.2.0ja:::::::*
cisco	ios_xe	3.9.1e	cpe:2.3:o:cisco:ios_xe:3.9.1e:::::::*
cisco	ios_xe	16.5.1c	cpe:2.3:o:cisco:ios_xe:16.5.1c:::::::*

CNA Affected

[
  {
    "product": "Cisco IOS XE",
    "vendor": "n/a",
    "versions": [
      {
        "status": "affected",
        "version": "Cisco IOS XE"
      }
    ]
  }
]

References

www.securityfocus.com/bid/101033

www.securitytracker.com/id/1039448

tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170927-lisp

CVSS2

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS3

9.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

AI Score

9.6

Confidence

High

EPSS

0.002

Percentile

64.5%

JSON

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