CVE-2019-12086

NameCVE-2019-12086
DescriptionA Polymorphic Typing issue was discovered in FasterXML jackson-databind 2.x before 2.9.9. When Default Typing is enabled (either globally or for a specific property) for an externally exposed JSON endpoint, the service has the mysql-connector-java jar (8.0.14 or earlier) in the classpath, and an attacker can host a crafted MySQL server reachable by the victim, an attacker can send a crafted JSON message that allows them to read arbitrary local files on the server. This occurs because of missing com.mysql.cj.jdbc.admin.MiniAdmin validation.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
ReferencesDLA-1798-1, DSA-4452-1
NVD severitymedium (attack range: remote)
Debian Bugs929177

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
jackson-databind (PTS)jessie2.4.2-2+deb8u4vulnerable
jessie (security)2.4.2-2+deb8u8fixed
stretch2.8.6-1+deb9u4vulnerable
stretch (security)2.8.6-1+deb9u5fixed
bullseye, buster2.9.8-3fixed
sid2.9.9.3-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
jackson-databindsource(unstable)2.9.8-2medium929177
jackson-databindsourcejessie2.4.2-2+deb8u6mediumDLA-1798-1
jackson-databindsourcestretch2.8.6-1+deb9u5mediumDSA-4452-1

Notes

https://github.com/FasterXML/jackson-databind/issues/2326
https://github.com/FasterXML/jackson-databind/commit/dda513bd7251b4f32b7b60b1c13740e3b5a43024

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