CVE-2019-1686

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Summary

CVECVE-2019-1686
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2019-04-17 22:29:00 UTC
Updated2020-10-16 13:01:00 UTC
DescriptionA 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.

Risk And Classification

Problem Types: NVD-CWE-Other

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Hardware Cisco Asr 9000v - All All All
Hardware Cisco Asr 9000v - All All All
Hardware Cisco Asr 9001 - All All All
Hardware Cisco Asr 9001 - All All All
Hardware Cisco Asr 9006 - All All All
Hardware Cisco Asr 9006 - All All All
Hardware Cisco Asr 9010 - All All All
Hardware Cisco Asr 9010 - All All All
Hardware Cisco Asr 9901 - All All All
Hardware Cisco Asr 9901 - All All All
Hardware Cisco Asr 9904 - All All All
Hardware Cisco Asr 9904 - All All All
Hardware Cisco Asr 9906 - All All All
Hardware Cisco Asr 9906 - All All All
Hardware Cisco Asr 9910 - All All All
Hardware Cisco Asr 9910 - All All All
Hardware Cisco Asr 9912 - All All All
Hardware Cisco Asr 9912 - All All All
Hardware Cisco Asr 9922 - All All All
Hardware Cisco Asr 9922 - All All All
Operating System Cisco Ios Xr All All All All
Operating System Cisco Ios Xr All All All All

References

ReferenceSourceLinkTags
Cisco ASR 9000 Series Aggregation Services Routers ACL Bypass Vulnerability CISCO tools.cisco.com Vendor Advisory
Cisco ASR 9000 Series Aggregation Services Routers Remote Security Bypass Vulnerability BID www.securityfocus.com Third Party Advisory, VDB Entry
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
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