PT-2014-3239 · Cisco · Cisco Nx-Os+1

Published 2014-01-06 · Updated 2017-08-29 · CVE-2013-6982

Positive Technologies (AI Summary)

CVSS v2.0

4.3

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Cisco NX-OS versions 6.2(2a) and earlier

Description The issue is related to the BGP implementation, which does not properly handle the interaction of UPDATE messages with IPv6, VPNv4, and VPNv6 labeled unicast-address families. This allows remote attackers to cause a denial of service (peer reset) via a crafted message. The vulnerability is due to the improper processing of specifically crafted BGP update messages. An attacker could exploit this by crafting a specific BGP-labeled update message, potentially resetting all BGP peers on a Cisco NX-OS device configured with either a VPNv4, VPNv6, or IPv6 labeled unicast address family. The exploit likely requires access to trusted, internal networks to send crafted BGP update messages to the targeted device.

Recommendations For Cisco NX-OS versions 6.2(2a) and earlier, update to a newer version that includes the fix for this issue, as indicated by Cisco in their security notice. As a temporary workaround, consider restricting access to the BGP functionality to minimize the risk of exploitation.

Fix

DoS

RCE

Weakness Enumeration

CWE-20

Related Identifiers

CVE-2013-6982

Affected Products

Cisco Nx-Os

Cisco Nexus

References · 9

• http://tools.cisco.com/security/center/viewAlert.x?alertId=32325 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2013-6982 · Security Note
• http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2013-6982 · Vendor Advisory
• http://securitytracker.com/id/1029568 · Note
• http://secunia.com/advisories/56169 · Note
• http://securityfocus.com/bid/64670 · Note
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/Cisco-SA-20140106-CVE-2013-6982 · Note
• https://exchange.xforce.ibmcloud.com/vulnerabilities/90119 · Note
• http://osvdb.org/101713 · Note