CVE-2020-9548 jackson-databind mishandles the interaction between serialization gadgets and typing
Attackers can execute arbitrary code via unsafe deserialization in jackson-databind when specific gadget classes are present.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2020-9548?
CVE-2020-9548 is a critical unsafe deserialization vulnerability in Debian Debian Linux, published on 2 Mar 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
FasterXML jackson-databind 2.x before 2.9.10.4 mishandles the interaction between serialization gadgets and typing, related to br.com.anteros.dbcp.AnterosDBCPConfig (aka anteros-core).
Weakness: CWE-502
Which versions are affected by CVE-2020-9548?
6 open source packages ship an affected version, including com.fasterxml.jackson.core:jackson-databind. It affects 25 products.
| Package | Affected | Fixed in |
|---|---|---|
com.fasterxml.jackson.core:jackson-databind Maven | From 2.0.0 | 2.7.9.7 |
com.fasterxml.jackson.core:jackson-databind Maven | From 2.0.0 | 2.7.9.7 |
com.fasterxml.jackson.core:jackson-databind Maven | From 2.8.0 | 2.8.11.6 |
com.fasterxml.jackson.core:jackson-databind Maven | From 2.8.0 | 2.8.11.6 |
com.fasterxml.jackson.core:jackson-databind Maven | From 2.9.0 | 2.9.10.4 |
com.fasterxml.jackson.core:jackson-databind Maven | From 2.9.0 | 2.9.10.4 |
Products include Debian Debian Linux, Fasterxml Jackson-Databind, Netapp Active Iq Unified Manager, Oracle Agile Product Lifecycle Management, Oracle Autovue for Agile Product Lifecycle Management, Oracle Banking Digital Experience and 19 more.
How do I fix CVE-2020-9548?
Upgrade com.fasterxml.jackson.core:jackson-databind to a fixed version for your release line: 2.7.9.7, 2.8.11.6 or 2.9.10.4.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2020-9548 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-9548 exists.
Public exploit code: 1 Nuclei template and 1 proofs of concept on GitHub.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as CLEANSTART-2026-IN66246, DEBIAN-CVE-2020-9548, GHSA-p43x-xfjf-5jhr, ROOT-APP-MAVEN-CVE-2020-9548, UBUNTU-CVE-2020-9548.