Detections
Analytics
Cisco IOS XR Software Broadband Network Gateway PPP over Ethernet DoS (cisco-sa-iosxr-bng-Gmg5Gxt)
medium Nessus Plugin ID 165215
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Synopsis
The remote device is missing a vendor-supplied security patchDescription
A denial of service (DoS) vulnerability exists in IOS XR Software due to the PPPoE feature not properly handling an error condition within a specific crafted packet sequence. An unauthenticated, adjacent attacker can exploit this issue, via a sequence of specific PPPoE packets from controlled customer premises equipment (CPE), to cause the process to continuously restart.Please see the included Cisco BIDs and Cisco Security Advisory for more information.
Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.
Solution
Upgrade to the relevant fixed version referenced in Cisco bug ID CSCwa57311See Also
http://www.nessus.org/u?7e145bee
https://tools.cisco.com/security/center/viewErp.x?alertId=ERP-74840
Plugin Details
Severity: Medium
ID: 165215
File Name: cisco-sa-iosxr-bng-Gmg5Gxt-iosxr.nasl
Version: 1.9
Type: combined
Family: CISCO
Published: 9/16/2022
Updated: 3/15/2024
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 4.4
CVSS v2
Risk Factor: Medium
Base Score: 4.6
Temporal Score: 3.4
Vector: CVSS2#AV:A/AC:H/Au:N/C:N/I:N/A:C
CVSS Score Source: CVE-2022-20849
CVSS v3
Risk Factor: Medium
Base Score: 6.1
Temporal Score: 5.3
Vector: CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
Vulnerability Information
CPE: cpe:/o:cisco:ios_xr
Required KB Items: Host/Cisco/IOS-XR/Version, Host/Cisco/IOS-XR/Model
Exploit Ease: No known exploits are available
Patch Publication Date: 9/14/2022
Vulnerability Publication Date: 9/14/2022
Reference Information
CVE: CVE-2022-20849