CVE-2020-26070

Description

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.

Risk Information

Base Score

8.6

MODERATE

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

EPSS Score

Exploitation Probability

1.709

Associated Vulnerability

Vulnerability	OS Platform
Cisco IOS XR Software Slow Path Forwarding Denial of Service Vulnerability For Cisco ASR 9000 Series Aggregation Services Routers	NCM
Cisco IOS XR Software Slow Path Forwarding Denial of Service Vulnerability For Cisco Network Convergence System 5000 Series	NCM
Improper Resource Shutdown or Release Vulnerability (CVE-2020-26070)	NCM

Patch Details

Click to see the patches provided by ManageEngine for this CVE

Patch ID	Patch Description
PATCH-1705564	Security Update for Cisco ASR 9000 Series Aggregation Services Routers 5.3.0.1i.BASE
PATCH-1706021	Security Update for Cisco Network Convergence System 5000 Series 6.2.1.21i.BASE

References

https://nvd.nist.gov/vuln/detail/CVE-2023-1234
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-1234