CVEvulnerability

CVE-2018-15428

6.8 MEDIUM Published 2018-10-05 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2018-10-05
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.0 ([email protected])
6.8 MEDIUM — CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H
CVSS 2.0 ([email protected])
4.3 MEDIUM — AV:N/AC:M/Au:N/C:N/I:N/A:P
Weaknesses
CWE-20

Description

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 configurations

• cisco ios xr 6.0.1 • cisco ios xr 6.0.2 • cisco ios xr 6.1.1 • cisco ios xr 6.1.2 • cisco ios xr 6.1.3 • cisco ios xr 6.1.4 • cisco ios xr 6.2.1 • cisco ios xr 6.2.2 • cisco ios xr 6.2.3 • cisco ios xr 6.4.1

Related

Weakness · CWE (1)

  • CWE-20 Improper Input Validation weakness

References