Denial of service in Cisco IOS XE Software AppNav-XE
| Risk | High |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2022-20678 |
| CWE-ID | CWE-413 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software |
Cisco IOS XE Operating systems & Components / Operating system Cisco 1000 Series Integrated Services Routers Hardware solutions / Routers & switches, VoIP, GSM, etc 4000 Series Integrated Services Routers Hardware solutions / Routers & switches, VoIP, GSM, etc ASR 1001-X Router Hardware solutions / Routers & switches, VoIP, GSM, etc ASR 1002-X Router Hardware solutions / Routers & switches, VoIP, GSM, etc Catalyst 8300 Series Routers Hardware solutions / Routers & switches, VoIP, GSM, etc Catalyst 8500 Series Routers Hardware solutions / Routers & switches, VoIP, GSM, etc Catalyst 8000V Edge Software Hardware solutions / Routers & switches, VoIP, GSM, etc Cloud Services Router 1000V Series Hardware solutions / Routers & switches, VoIP, GSM, etc |
| Vendor | Cisco Systems, Inc |
Security Bulletin
This security bulletin contains one high risk vulnerability.
1) Improper Resource Locking
EUVDB-ID: #VU62317
Risk: High
CVSSv4.0: [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]
CVE-ID: CVE-2022-20678
CWE-ID:
CWE-413 - Improper Resource Locking
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to the incorrect handling of certain TCP segments in the AppNav-XE feature. A remote attacker can send a stream of crafted TCP traffic and perform a denial of service (DoS) attack.
MitigationInstall updates from vendor's website.
Vulnerable software versionsCisco IOS XE: 16.9.6 - 17.3.3
Cisco 1000 Series Integrated Services Routers: All versions
4000 Series Integrated Services Routers: All versions
ASR 1001-X Router: All versions
ASR 1002-X Router: All versions
Catalyst 8300 Series Routers: All versions
Catalyst 8500 Series Routers: All versions
Catalyst 8000V Edge Software: All versions
Cloud Services Router 1000V Series: All versions
CPE2.3- cpe:2.3:o:cisco_systems:cisco_ios_xe:16.9.6:*:*:*:*:*:*:*
- cpe:2.3:o:cisco_systems:cisco_ios_xe:16.12.4:*:*:*:*:*:*:*
- cpe:2.3:o:cisco_systems:cisco_ios_xe:16.12.5:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:cisco_1000_series_integrated_services_routers:*:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:4000_series_integrated_services_routers:*:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:asr_1001-x_router:*:*:*:*:*:cisco_asr_1000_series_aggregation_services_routers:*:*
- cpe:2.3:h:cisco_systems:asr_1002-x_router:*:*:*:*:*:cisco_asr_1000_series_aggregation_services_routers:*:*
- cpe:2.3:h:cisco_systems:catalyst_8300_series_routers:*:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:catalyst_8500_series_routers:*:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:catalyst_8000v_edge_software:*:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:cloud_services_router_1000v_series:*:*:*:*:*:*:*:*
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-appnav-xe-dos-j5MXTR4
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
