CVE-2016-9299 Improper Neutralization of Special Elements used in an LDAP Query in Jenkins

What is CVE-2016-9299?

CVE-2016-9299 is a critical unsafe deserialization vulnerability in Fedoraproject Fedora, published on 12 Jan 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

The remoting module in Jenkins before 2.32 and LTS before 2.19.3 allows remote attackers to execute arbitrary code via a crafted serialized Java object, which triggers an LDAP query to a third-party server.

Weakness: CWE-90

Which versions are affected by CVE-2016-9299?

4 open source packages ship an affected version, including org.jenkins-ci.main:jenkins-core. It affects 2 products.

Products include Fedoraproject Fedora, Jenkins Jenkins.

How do I fix CVE-2016-9299?

Upgrade org.jenkins-ci.main:jenkins-core to a fixed version for your release line: 2.19.3 or 2.32.

Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.

Is CVE-2016-9299 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2016-9299 exists.

Public exploit code: 1 Metasploit module, 2 Exploit-DB entries and 1 proofs of concept on GitHub.

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All Fedoraproject Fedora vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-2x9h-h3c4-wqqh, MGASA-2016-0406.