CVE-2022-20849

Cisco IOS XR Software Broadband Network Gateway PPPoE Denial of Service Vulnerability

Description

A vulnerability in the Broadband Network Gateway PPP over Ethernet (PPPoE) feature of Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to cause the PPPoE process to continually crash. This vulnerability exists because the PPPoE feature does not properly handle an error condition within a specific crafted packet sequence. An attacker could exploit this vulnerability by sending a sequence of specific PPPoE packets from controlled customer premises equipment (CPE). A successful exploit could allow the attacker to cause the PPPoE process to continually restart, resulting in a denial of service condition (DoS).Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.This advisory is part of the September 2022 release of the Cisco IOS XR Software Security Advisory Bundled Publication. For a complete list of the advisories and links to them, see .

Category

6.1
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.02%
Affected: Cisco Cisco IOS XR Software
Published at:
Updated at:

References

Link Tags
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-bng-Gmg5Gxt

Frequently Asked Questions

What is the severity of CVE-2022-20849?
CVE-2022-20849 has been scored as a medium severity vulnerability.
How to fix CVE-2022-20849?
To fix CVE-2022-20849, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2022-20849 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2022-20849 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2022-20849?
CVE-2022-20849 affects Cisco Cisco IOS XR Software.
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