CVE-2021-29480 – io.ratpack:ratpack-session

Package

Manager: maven
Name: io.ratpack:ratpack-session
Vulnerable Version: >=0 <1.9.0

Severity

Level: Medium

CVSS v3.1: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

CVSS v4.0: CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

EPSS: 0.00089 pctl0.26361

Details

Ratpack's default client side session signing key is highly predictable ### Impact The client side session module uses the application startup time as the signing key by default. This means that if an attacker can determine this time, and if encryption is not also used (which is recommended, but is not on by default), the session data could be tampered with by someone with the ability to write cookies. The default configuration is unsuitable for production use as an application restart renders all sessions invalid and is not multi-host compatible, but its use is not actively prevented. ### Vulnerability Location https://github.com/ratpack/ratpack/blob/29434f7ac6fd4b36a4495429b70f4c8163100332/ratpack-session/src/main/java/ratpack/session/clientside/ClientSideSessionConfig.java#L29 ### Patches As of Ratpack 1.9.0 the default value is a securely randomly generated value, generated at application startup time. ### Workarounds Supply an alternative signing key, as per the documentation's recommendation.

Metadata

Created: 2021-07-01T17:02:26Z
Modified: 2022-08-11T00:17:56Z
Source: https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2021/07/GHSA-2cc5-23r7-vc4v/GHSA-2cc5-23r7-vc4v.json
CWE IDs: ["CWE-330", "CWE-340"]
Alternative ID: GHSA-2cc5-23r7-vc4v
Finding: F034
Auto approve: 1