Polymorphic Typing in FasterXML jackson-databind

Description

A Polymorphic Typing issue was discovered in FasterXML jackson-databind 2.0.0 through 2.9.10. When Default Typing is enabled (either globally or for a specific property) for an externally exposed JSON endpoint and the service has the commons-dbcp (1.4) jar in the classpath, and an attacker can find an RMI service endpoint to access, it is possible to make the service execute a malicious payload. This issue exists because of org.apache.commons.dbcp.datasources.SharedPoolDataSource and org.apache.commons.dbcp.datasources.PerUserPoolDataSource mishandling.

Basic information

Type
reviewed
Severity
critical
Advisory on GitHub
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Repository advisory
Source code
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Published (advisory)
2019-10-28 20:51:15 UTC
Updated
2024-03-15 00:57:37 UTC
GitHub reviewed
2019-10-28 19:19:01 UTC
NVD published
2019-10-01

EPSS Score

Score Percentile
0.41% 61.51%

CVSS Scores

Base score Version Severity Vector
9.8 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.

Identifiers

CWEs

CWE id Name
CWE-502 Deserialization of Untrusted Data

Credits

  • sunSUNQ (analyst)

Affected packages (3)

Vulnerable version ranges and first patched releases as published by GitHub.

Ecosystem Package Vulnerable range First patched Vulnerable functions
maven com.fasterxml.jackson.core:jackson-databind >= 2.9.0, < 2.9.10.1 2.9.10.1
maven com.fasterxml.jackson.core:jackson-databind >= 2.0.0, < 2.6.7.3 2.6.7.3
maven com.fasterxml.jackson.core:jackson-databind >= 2.7.0, < 2.8.11.5 2.8.11.5

References

cvelogic Threat Intelligence