CVE-2019-0195: File reading Leads Java Deserialization Vulnerability Severity: important Vendor: The Apache Software Foundation Versions affected: all Apache Tapestry versions between 5.4.0, including its betas, and 5.4.3
Description: Manipulating classpath asset file URLs, an attacker could guess the path to a known file in the classpath and have it downloaded. If the attacker found the file with the value of the tapestry.hmac-passphrase configuration symbol, most probably the webapp's AppModule class, the value of this symbol could be used to craft a Java deserialization attack, thus running malicious injected Java code. The vector would be the t:formdata parameter from the Form component. Mitigation: Upgrade to Tapestry 5.4.5, which is a drop-in replacement for any 5.4.x version. Credit: Ricter Zheng -- Thiago H. de Paula Figueiredo
