QID 150504

Date Published: 2022-05-11

QID 150504: Apache Struts 2 Remote Code Execution Vulnerability (CVE-2021-31805)

Apache Struts is a free, open-source, MVC framework for creating elegant, modern Java web applications.

In affected versions of Apache Struts 2, the fix for CVE-2020-17530 was incomplete as a result some of the tag attributes perform a double evaluation if a developer applies forced OGNL evaluation by using the "%{...}" syntax. Using a forced OGNL evaluation on untrusted user input allows an attacker to perform remote code execution and security degradation.

Affected Versions:
Apache Struts 2.0.0 - 2.5.29

QID Detection Logic:
This QID sends POST and GET request along with the OGNL payload inside some tag attributes, where vulnerable servers will make a DNS query that will trigger Qualys Periscope detection mechanism.

Successful exploitation of this vulnerability could allow an remote attacker to execute arbitrary code on the target system.

CVSS V3 rated as Critical - 9.8 severity.

CVSS V2 rated as High - 7.5 severity.

Solution

Customers are advised to upgrade Apache Struts 2.5.30 or higher. Please refer to the S2-062 advisory for more information pertaining to this vulnerability.

Vendor References

S2-062 - cwiki.apache.org/confluence/display/WW/S2-062

CVEs related to QID 150504

CVE-2021-31805 |

Software Advisories

Advisory ID	Software	Component	Link
S2-062			cwiki.apache.org/confluence/display/WW/S2-062

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