Security News > 2020 > December > Possible Code Execution Flaw in Apache Struts
The Apache Software Foundation has released a security update for Struts 2, to address what is described as a "Possible remote code execution" flaw related to the OGNL technology.
Tracked as CVE-2020-17530, the newly addressed bug resides in "Forced OGNL evaluation, when evaluated on raw user input in tag attributes," according to an Apache advisory.
Remote code execution could be achieved when forced OGNL evaluation is used on untrusted input.
The workaround solution proposed by Apache is simple: developers should make sure that forced OGNL evaluation is not used on untrusted input.
The vulnerability was found to affect Struts 2.0.0 to Struts 2.5.25 and was addressed in Struts 2.5.26, where checks are performed to ensure that expression evaluation won't result in double evaluation.
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Related Vulnerability
| DATE | CVE | VULNERABILITY TITLE | RISK |
|---|---|---|---|
| 2020-12-11 | CVE-2020-17530 | Expression Language Injection vulnerability in multiple products Forced OGNL evaluation, when evaluated on raw user input in tag attributes, may lead to remote code execution. | 9.8 |