CVE-2018-15428

published 2018-10-05

CVE-2018-15428: A vulnerability in the implementation of Border Gateway Protocol (BGP) functionality in Cisco IOS XR Software could allow an unauthenticated, remote attacker…

Priority P4 34 medium 6.8 CVSS 3.0

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

A vulnerability in the implementation of Border Gateway Protocol (BGP) functionality in Cisco IOS XR Software 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.

Affected

12 ranges

Vendor	Product	Version range	Fixed in
cisco	cisco_ios_xr_software	—	—
cisco	ios_xr	—	—
cisco	ios_xr	—	—
cisco	ios_xr	—	—
cisco	ios_xr	—	—
cisco	ios_xr	—	—
cisco	ios_xr	—	—
cisco	ios_xr	—	—
cisco	ios_xr	—	—
cisco	ios_xr	—	—
cisco	ios_xr	—	—
cisco	ios_xr	—	—

CVSS provenance

nvd v3.0 6.8 MEDIUM CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H

nvd v2.0 4.3 MEDIUM AV:N/AC:M/Au:N/C:N/I:N/A:P

vendor_cisco 6.8 MEDIUM

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