PT-2015-1321 · Cisco · Cisco Ios Xr

Published 2015-06-11 · Updated 2017-01-04 · CVE-2015-0769

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Cisco IOS XR versions 4.0.1 through 4.2.0 for CRS-3 Carrier Routing System

Description The issue is related to incorrect processing of IPv6 packets with valid but unlikely IPv6 extension headers, which can cause a denial of service. An attacker could exploit this by sending a specially crafted IPv6 packet to an affected device configured to process IPv6 traffic, leading to a line-card reload and resulting in a DoS condition.

Recommendations For Cisco IOS XR versions 4.0.1 through 4.2.0, update to a newer version that addresses this issue, as software updates have been released by Cisco to fix the vulnerability. At the moment, there is no information about a workaround that mitigates this vulnerability.

Fix

DoS

Weakness Enumeration

CWE-399

Related Identifiers

BDU:2015-10389

CVE-2015-0769

Affected Products

Cisco Ios Xr

References · 5

• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20150611-iosxr · Vendor Advisory
• http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20150611-iosxr · Vendor Advisory
• https://bdu.fstec.ru/vul/2015-10389 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2015-0769 · Security Note
• http://securitytracker.com/id/1032563 · Note