CVE-2017-12615 Apache Tomcat: dangerous file upload
In plain words: The program accepts files it should refuse, such as programs disguised as ordinary uploads. The attacker can place and run their own tools on the server.
Confirmed exploited by CISA on · US federal patch deadline Apr 15, 2022
What to do
- Install Apache's security update for Tomcat. If no update exists, follow the vendor's workaround or stop using the product until one ships.
- Turn on automatic updates for the operating system and for Office, PDF and archive apps.
- Be careful with unexpected attachments — documents, .zip/.rar files and shortcuts are common bait.
- Use a normal (non-admin) account day to day and keep built-in protection like Microsoft Defender on.
Who is affected
Could reach you. Used in ransomware, which spreads to ordinary people and small businesses.
What's at risk: Your files, saved passwords and accounts. Many of these let a program that is already running gain full administrator control.
The details
- Official name
- Apache Tomcat on Windows Remote Code Execution Vulnerability
- Product
- Apache Tomcat
- CISA description
- When running Apache Tomcat on Windows with HTTP PUTs enabled, it is possible to upload a JSP file to the server via a specially crafted request. This JSP could then be requested and any code it contained would be executed by the server.
- Type of flaw
- Dangerous file upload (CWE-434)
- Confirmed exploited
- Mar 25, 2022 — known to be used in ransomware attacks
- US federal patch deadline
- Apr 15, 2022
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Answering about CVE-2017-12615 ·
Questions about CVE-2017-12615
Is CVE-2017-12615 being exploited?
Yes. CISA added CVE-2017-12615 to its Known Exploited Vulnerabilities catalog on Mar 25, 2022, which means there is reliable evidence of real-world attacks, including by ransomware groups.
How do I fix CVE-2017-12615?
Install Apache's security update for Tomcat. If no update exists, follow the vendor's workaround or stop using the product until one ships. Turn on automatic updates for the operating system and for Office, PDF and archive apps.
Am I affected by CVE-2017-12615?
Only if you use Apache Tomcat. Used in ransomware, which spreads to ordinary people and small businesses.