Deserialization in Apache Tapestry
CVE-2020-17531
A Java Serialization vulnerability was found in Apache Tapestry 4. Apache Tapestry 4 will attempt to deserialize the "sp" parameter even before invoking the page's validate method, leading to deserialization without authentication. Apache Tapestry 4 reached end of life in 2008 and no update to address this issue will be released. Apache Tapestry 5 versions are not vulnerable to this issue. Users of Apache Tapestry 4 should upgrade to the latest Apache Tapestry 5 version.
Vulnerability class: Insecure Deserialization
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.100 (95.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 96th percentile — 95.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.100 · newest: 0.100 · change: 0.000
Affected products
- Apache Tapestry
- Apache Software Foundation Tapestry — versions Apache Tapestry 4
Weakness classification (CWE)
Public proof-of-concept exploits
References
- lists.apache.org/thread.html/r700a6aa234dbff0555d4187bdc8274d7e4c0afbf35b9a3457… (Mailing List, Vendor Advisory)
- security.netapp.com/advisory/ntap-20210115-0007/ (Third Party Advisory)
- www.openwall.com/lists/oss-security/2022/12/02/1 (mailing-list, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-17531?
- CVE-2020-17531 is a critical-severity vulnerability in Apache Tapestry, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2020-12-08.
- How severe is CVE-2020-17531?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2020-17531 known to be exploited?
- 14 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.