CVE-2022-20849 - CVE House
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Status published Medium CVE-2022-20849

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

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 .

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

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Affected Vendor

Affected Software

Cisco IOS XR Software
Vulnerable Versions:
6.5.3, 6.6.1, 6.5.15, 7.0.1, 6.6.25, 6.6.2, 6.5.1, 6.5.2, 7.1.1, 7.0.90, 6.6.3, 6.7.1, 7.0.2, 7.1.15, 7.1.2, 7.2.1, 6.7.2, 7.1.25, 6.6.4, 7.3.1, 7.1.3, 6.7.3, 7.4.1, 7.2.2, 6.8.1, 7.3.2, 7.5.1, 7.3.3, 6.8.2, 7.3.4, 7.4.2, 6.7.35, 6.9.1

Timeline

Official Publish: November 15th, 2024
Last Modified: November 15th, 2024
Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H

Weaknesses (CWE)

CWE-391

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.