CVE-2020-26070

published 2020-11-12

CVE-2020-26070: A vulnerability in the ingress packet processing function of Cisco IOS XR Software for Cisco ASR 9000 Series Aggregation Services Routers could allow an…

Priority P3 51 high 8.6 CVSS 3.1

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

A vulnerability in the ingress packet processing function of Cisco IOS XR Software for Cisco ASR 9000 Series Aggregation Services Routers could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to improper resource allocation when an affected device processes network traffic in software switching mode (punted). An attacker could exploit this vulnerability by sending specific streams of Layer 2 or Layer 3 protocol data units (PDUs) to an affected device. A successful exploit could cause the affected device to run out of buffer resources, which could make the device unable to process or forward traffic, resulting in a DoS condition. The device would need to be restarted to regain functionality.

Affected

4 ranges

Vendor	Product	Version range	Fixed in
cisco	cisco_ios_xr_software	—	—
cisco	ios_xr	< 6.7.2	6.7.2
cisco	ios_xr	—	—
cisco	ios_xr	>= 7.1.0 < 7.1.2	7.1.2

CVSS provenance

nvd v3.1 8.6 HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

nvd v2.0 7.8 HIGH AV:N/AC:L/Au:N/C:N/I:N/A:C

vendor_cisco 8.6 HIGH

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