CVE-2022-20871: asyncos Command Injection — Fix

Description

A vulnerability in the web management interface of Cisco AsyncOS for Cisco Secure Web Appliance, formerly Cisco Web Security Appliance (WSA), could allow an authenticated, remote attacker to perform a command injection and elevate privileges to root. This vulnerability is due to insufficient validation of user-supplied input for the web interface. An attacker could exploit this vulnerability by authenticating to the system and sending a crafted HTTP packet to the affected device. A successful exploit could allow the attacker to execute arbitrary commands on the underlying operating system and elevate privileges to root. To successfully exploit this vulnerability, an attacker would need at least read-only credentials.Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.Attention: Simplifying the Cisco portfolio includes the renaming of security products under one brand: Cisco Secure. For more information, see .

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CVSS v3.1 Score

6.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

Weakness Type (CWE)

CWE-78 OS Command Injection

Affected Products

Vendor	Product	Versions
cisco	asyncos	All
cisco	asyncos	All
cisco	asyncos	All
cisco	asyncos	All
cisco	asyncos	All
cisco	asyncos	All
cisco	asyncos	All
cisco	asyncos	All
cisco	asyncos	All
cisco	asyncos	All
cisco	asyncos	All
cisco	secure_web_appliance_virtual_s1000v	All
cisco	secure_web_appliance_virtual_s100v	All
cisco	secure_web_appliance_virtual_s300v	All
cisco	secure_web_appliance_virtual_s600v	All
cisco	secure_web_appliance_s196	All
cisco	secure_web_appliance_s396	All
cisco	secure_web_appliance_s696	All

References

Advisories & Patches

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wsa-prv-esc-8PdRU8t8

Other References

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-bw-thinrcpt-xss-gSj4CecU https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cssm-priv-esc-SEjz69dv

Frequently Asked Questions

What is CVE-2022-20871? +

A vulnerability in the web management interface of Cisco AsyncOS for Cisco Secure Web Appliance, formerly Cisco Web Security Appliance (WSA), could allow an authenticated, remote attacker to perform a command injection and elevate privileges to root. This vulnerability is due to insufficient validation of user-supplied input for the web interface. An attacker could exploit this vulnerability by authenticating to the system and sending a crafted HTTP packet to the affected device. A successful exploit could allow the attacker to execute arbitrary commands on the underlying operating system and elevate privileges to root. To successfully exploit this vulnerability, an attacker would need at least read-only credentials.Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.Attention: Simplifying the Cisco portfolio includes the renaming of security products under one brand: Cisco Secure. For more information, see . It has a CVSS v3.1 base score of 6.3 (MEDIUM).

How severe is CVE-2022-20871? +

CVE-2022-20871 has a CVSS v3.1 score of 6.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2022-20871? +

CVE-2022-20871 affects products from cisco, specifically: asyncos, secure_web_appliance_s196, secure_web_appliance_s396, secure_web_appliance_s696, secure_web_appliance_virtual_s1000v, secure_web_appliance_virtual_s100v, secure_web_appliance_virtual_s300v, secure_web_appliance_virtual_s600v. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2022-20871? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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CVE-2022-20871