Missing XML Validation in Cisco Web Security Appliance
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2021-1359 |
| CWE-ID | CWE-112 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software |
Cisco AsyncOS for Web Security Appliances Server applications / IDS/IPS systems, Firewalls and proxy servers |
| Vendor | Cisco Systems, Inc |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
1) Missing XML Validation
EUVDB-ID: #VU54607
Risk: Medium
CVSSv4.0: 6.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2021-1359
CWE-ID:
CWE-112 - Missing XML Validation
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to compromise the target system.
The vulnerability exists due to insufficient validation of user-supplied XML input for the web interface. A remote authenticated attacker can upload specially crafted XML configuration files to execute arbitrary commands on the underlying operating system and elevate privileges to root.
MitigationInstall updates from vendor's website.
Vulnerable software versionsCisco AsyncOS for Web Security Appliances: 11.8 - 12.5
CPE2.3- cpe:2.3:a:cisco_systems:cisco_asyncos_for_web_security_appliances:*:*:*:*:*:*:*:*
- cpe:2.3:a:cisco_systems:cisco_asyncos_for_web_security_appliances:11.8:*:*:*:*:*:*:*
- cpe:2.3:a:cisco_systems:cisco_asyncos_for_web_security_appliances:12.0:*:*:*:*:*:*:*
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated user 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.
