Vulnerability in Ratpack
CVE-2021-29480
Ratpack is a toolkit for creating web applications. In versions prior to 1.9.0, 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. As of Ratpack 1.9.0, the default value is a securely randomly generated value, generated at application startup time. As a workaround, supply an alternative signing key, as per the documentation's recommendation.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.003 (16.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 16th percentile — 16.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Ratpack — versions < 1.9.0
- Ratpack Project
Weakness classification (CWE)
References
- github.com/ratpack/ratpack/security/advisories/GHSA-2cc5-23r7-vc4v (Third Party Advisory)
- github.com/ratpack/ratpack/blob/29434f7ac6fd4b36a4495429b70f4c8163100332/ratpac… (Third Party Advisory)
Frequently asked questions
- What is CVE-2021-29480?
- CVE-2021-29480 is a medium-severity vulnerability in Ratpack, classified under CWE-340. CVSS score: 4.4/10. Published 2021-06-29.
- How severe is CVE-2021-29480?
- Medium severity. CVSS v3 base score is 4.4 out of 10.