Howard M. Lewis Ship created TAP5-1988:
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Summary: Tapestry Security Violations
Key: TAP5-1988
URL: https://issues.apache.org/jira/browse/TAP5-1988
Project: Tapestry 5
Issue Type: Bug
Components: tapestry-core
Affects Versions: 5.3, 5.4
Reporter: Howard M. Lewis Ship
Attachments: MATTA-2012-004.txt
An unsolicited security review arrived from Matta concerning Tapestry; both
core code, and the GSoC project that provides anti-CSRF (cross-site forgery
protection).
Although I am dubious about the "gzip bombs" allegation, it can be addressed.
In theory, because the contents are an object stream, the objects could be
replaced. In practice, all objects need to implement a Tapestry-specific
interface (ComponentAction) which means that arbitrary objects can not be
injected; only objects that are already present on the classpath of the running
application AND implement the ComponentAction interface could be injected. An
attacker would already have "the keys to the kingdom" before they could do
damage .. that is, if they can manipulate the classpath of the running
application, they already have the ability to deploy any code, or access
internal servers directly.
However, I would see this as an opportunity to remove the t:state:client
("client" PersistentFieldStrategy implementation).
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