CVE-2017-5638
Published: November 3, 2021
Official Description
Apache Struts Jakarta Multipart parser allows for malicious file upload using the Content-Type value, leading to remote code execution.
CISA KEV Advisory
Apache Struts Remote Code Execution Vulnerability
Apache Struts Jakarta Multipart parser allows for malicious file upload using the Content-Type value, leading to remote code execution.
Apply updates per vendor instructions.
Risk Analysis
This vulnerability in the Apache Struts Jakarta Multipart parser allows for malicious file upload via the Content-Type value, leading to remote code execution. The high EPSS score of 0.94267 and its presence in the KEV catalog indicate a very high likelihood of exploitation and critical urgency.
Active exploitation of this vulnerability has been observed in the wild, and it is confirmed to be exploited by CISA, indicating a severe and immediate threat. This vulnerability is remotely exploitable.
Update Apache Struts to a patched version that addresses the Jakarta Multipart parser vulnerability. Ensure proper input validation and restrict file upload capabilities where possible.
Technical Analysis
CVE-2017-5638 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CISA has added CVE-2017-5638 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.
Affected Vendors & Products
Exploit & PoC Resources
All References (1)
Quick Facts
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2017-5638 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
- !CISA KEV: Federal agencies must patch per BOD 22-01 timeline
- !Active exploitation confirmed — treat as P1