CVE-2016-10027 Smack allows the bypass of TLS protections

What is CVE-2016-10027?

CVE-2016-10027 is a medium-severity 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

Race condition in the XMPP library in Smack before 4.1.9, when the SecurityMode.required TLS setting has been set, allows man-in-the-middle attackers to bypass TLS protections and trigger use of cleartext for client authentication by stripping the "starttls" feature from a server response.

Weakness: CWE-362

Which versions are affected by CVE-2016-10027?

2 open source packages ship an affected version, including org.igniterealtime.smack:smack-core. It affects 2 products.

Products include Fedoraproject Fedora, Igniterealtime Smack.

How do I fix CVE-2016-10027?

Upgrade org.igniterealtime.smack:smack-core to 4.1.9 or later.

Is CVE-2016-10027 being exploited?

There is no known exploitation of CVE-2016-10027 in the wild and no public exploit code.

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All Fedoraproject Fedora vulnerabilities

Sources

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

Also known as GHSA-66pq-hqv5-228g.