Packet Filtering Bypass in Cisco SD-WAN Software
| Risk | Medium |
| Patch available | NO |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2020-3444 |
| CWE-ID | CWE-20 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software |
Cisco IOS XE Operating systems & Components / Operating system Cisco IOS XE SD-WAN Other software / Other software solutions |
| Vendor | Cisco Systems, Inc |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
1) Input validation error
EUVDB-ID: #VU48163
Risk: Medium
CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2020-3444
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to bypass L3 and L4 traffic filters.
The vulnerability exists due to improper traffic filtering conditions on an affected device. A remote attacker can send a specially crafted TCP packet, bypass the L3 and L4 traffic filters and inject an arbitrary packet into the network.
MitigationCybersecurity Help is currently unaware of any official solution to address this vulnerability.
Vulnerable software versionsCisco IOS XE: 17.2.1
Cisco IOS XE SD-WAN: 16.12.2r
CPE2.3- cpe:2.3:o:cisco_systems:cisco_ios_xe:17.2.1:*:*:*:*:*:*:*
- cpe:2.3:a:cisco_systems:cisco_ios_xe_sd-wan:*:*:*:*:*:*:*:*
- cpe:2.3:a:cisco_systems:cisco_ios_xe_sd-wan:16.12.2r:*:*:*:*:*:*:*
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.
