PT-2018-13028 · Cisco · Cisco Ios Xr

Published 2018-10-03 · Updated 2019-10-09 · CVE-2018-15428

Positive Technologies (AI Summary)

CVSS v3.1

6.8

Medium

Base vector

AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Cisco IOS XR Software (affected versions not specified)

Description A vulnerability in the implementation of Border Gateway Protocol (BGP) functionality could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition. The vulnerability is due to incorrect processing of certain BGP update messages. An attacker could exploit this vulnerability by sending BGP update messages that include a specific, malformed attribute to be processed by an affected system. A successful exploit could allow the attacker to cause the BGP process to restart unexpectedly, resulting in a DoS condition. The Cisco implementation of BGP accepts incoming BGP traffic only from explicitly defined peers. To exploit this vulnerability, the malicious BGP update message would need to come from a configured, valid BGP peer, or would need to be injected by the attacker into the victim's BGP network on an existing, valid TCP connection to a BGP peer.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

DoS

RCE

Weakness Enumeration

CWE-20

Related Identifiers

CVE-2018-15428

Affected Products

Cisco Ios Xr

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2018-15428 · Security Note
• https://osv.dev/vulnerability/CVE-2018-15428 · Vendor Advisory
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20181003-iosxr-dos · Vendor Advisory
• http://securitytracker.com/id/1041790 · Note