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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HApache Tapestry
APPApache5.4.0 – 5.4.3
Related vulnerabilities
Apache Tapestry 3.x — RCE przez deserializację niezaufanych danych
Apache Tapestry — RCE przez bypass filtra pobierania plików klasowych
Apache Tapestry 4 — deserializacja parametru 'sp' bez uwierzytelnienia
Apache Tapestry — timing side channel w weryfikacji HMAC prowadzący do RCE
Vulnerability in tapestry-core in Apache Tapestry 5.5.0+ on all platforms allows attackers to download clsspat...