CVE-2020-9546 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-2020-9546?
CVE-2020-9546 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 org.apache.hadoop.shaded.com.zaxxer.hikari.HikariConfig (aka shaded hikari-config).
Weakness: CWE-502
Which versions are affected by CVE-2020-9546?
2 open source packages ship an affected version, including com.fasterxml.jackson.core:jackson-databind. It affects 31 products.
| Package | Affected | Fixed in |
|---|---|---|
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 25 more.
How do I fix CVE-2020-9546?
Upgrade com.fasterxml.jackson.core:jackson-databind to 2.9.10.4 or later.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2020-9546 being exploited?
There is no known exploitation of CVE-2020-9546 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as CLEANSTART-2026-GF02196, DEBIAN-CVE-2020-9546, GHSA-5p34-5m6p-p58g, UBUNTU-CVE-2020-9546.