A vulnerability in the TCP flags inspection feature for access control lists (ACLs) on Cisco ASR 9000 Series Aggregation Services Routers could allow an unauthenticated, remote attacker to bypass protection offered by a configured ACL on an affected device. The vulnerability is due to incorrect processing of the ACL applied to an interface of an affected device when Cisco Express Forwarding load balancing using the 3-tuple hash algorithm is enabled. An attacker could exploit this vulnerability by sending traffic through an affected device that should otherwise be denied by the configured ACL. An exploit could allow the attacker to bypass protection offered by a configured ACL on the affected device. There are workarounds that address this vulnerability. Affected Cisco IOS XR versions are: Cisco IOS XR Software Release 5.1.1 and later till first fixed. First Fixed Releases: 6.5.2 and later, 6.6.1 and later.
History

Tue, 19 Nov 2024 19:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


cve-icon MITRE

Status: PUBLISHED

Assigner: cisco

Published: 2019-04-17T21:50:21.580813Z

Updated: 2024-11-19T19:11:39.657Z

Reserved: 2018-12-06T00:00:00

Link: CVE-2019-1686

cve-icon Vulnrichment

Updated: 2024-08-04T18:28:40.969Z

cve-icon NVD

Status : Modified

Published: 2019-04-17T22:29:00.360

Modified: 2024-11-21T04:37:05.900

Link: CVE-2019-1686

cve-icon Redhat

No data.