CVE-2021-31805

Description

The fix issued for CVE-2020-17530 was incomplete. So from Apache Struts 2.0.0 to 2.5.29, still some of the tag’s attributes could perform a double evaluation if a developer applied forced OGNL evaluation by using the %{...} syntax. Using forced OGNL evaluation on untrusted user input can lead to a Remote Code Execution and security degradation.

Affected products

• Apache Software Foundation / Apache Struts2.0.0 to 2.5.29 – 2.0.0 to 2.5.29

Exploits & proofs of concept

• nucleiApache Struts2 S2-062 - Remote Code Executionby taielab

References

• MISChttps://cwiki.apache.org/confluence/display/WW/S2-062
• MAILING_LISThttp://www.openwall.com/lists/oss-security/2022/04/12/6
• VENDOR_ADVISORYhttps://www.oracle.com/security-alerts/cpujul2022.html
• MISChttps://security.netapp.com/advisory/ntap-20220420-0001/