Security Bypass in Cisco AsyncOS Software for Cisco Email Security Appliance
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2020-3368 |
| CWE-ID | CWE-20 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software |
Cisco AsyncOS for Cisco Email Security Appliance Server applications / IDS/IPS systems, Firewalls and proxy servers |
| Vendor | Cisco Systems, Inc |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
1) Input validation error
EUVDB-ID: #VU29147
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-2020-3368
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to bypass the URL reputation filters on an affected device.
The vulnerability exists due to insufficient validation of user-supplied input in the antispam protection mechanisms. A remote attacker can craft the URL in a particular way and bypass the URL reputation filters that are configured for the affected device, which could allow malicious URLs to pass through the device.
MitigationInstall updates from vendor's website.
Vulnerable software versionsCisco AsyncOS for Cisco Email Security Appliance: 12.1 089 - 12.5.0 066
CPE2.3- cpe:2.3:a:cisco_systems:cisco_asyncos_for_cisco_email_security_appliance:12.1 089:*:*:*:*:*:*:*
- cpe:2.3:a:cisco_systems:cisco_asyncos_for_cisco_email_security_appliance:12.5.0 066:*:*:*:*:*:*:*
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
How the attacker can exploit this vulnerability?
The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
