Input validation error in Cisco Systems, Inc products - CVE-2022-20849

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Main Vulnerability Database Vulnerabilities #VU67389

Input validation error in Cisco Systems, Inc products - CVE-2022-20849

Published: September 15, 2022


Vulnerability identifier: #VU67389
CSH Severity: Low
CVSS v4: 6 [CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2022-20849
CWE-ID: CWE-20
Exploitation vector: Adjecent network
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to the affected application does not properly handle an error condition in the Broadband Network Gateway PPP over Ethernet (PPPoE) feature. A remote attacker on the local network can pass specially crafted input to the application and perform a denial of service (DoS) attack.


Affected software

Cisco ASR 9000 Series Aggregation Services Routers
Cisco IOS XRv 9000 Router
Cisco IOS XR

How to mitigate CVE-2022-20849

Install updates from vendor's website.

Cisco IOS XR - update to 7.5.2

External References

Related Security Bulletins