Ratpack is a toolkit for creating web applications. In versions prior to 1.9.0, a malicious attacker can achieve Remote Code Execution (RCE) via a maliciously crafted Java deserialization gadget chain leveraged against the Ratpack session store. If one's application does not use Ratpack's session mechanism, it is not vulnerable. Ratpack 1.9.0 introduces a strict allow-list mechanism that mitigates this vulnerability when used. Two possible workarounds exist. The simplest mitigation for users of earlier versions is to reduce the likelihood of attackers being able to write to the session data store. Alternatively or additionally, the allow-list mechanism could be manually back ported by providing an alternative implementation of `SessionSerializer` that uses an allow-list.
History

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2021-06-29T18:35:11

Updated: 2024-08-03T22:11:05.208Z

Reserved: 2021-03-30T00:00:00

Link: CVE-2021-29485

cve-icon Vulnrichment

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cve-icon NVD

Status : Analyzed

Published: 2021-06-29T19:15:09.607

Modified: 2021-07-08T15:26:03.150

Link: CVE-2021-29485

cve-icon Redhat

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