CVE-2016-10027

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.

Category

5.9
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.39%
Vendor Advisory fedoraproject.org Vendor Advisory igniterealtime.org Vendor Advisory igniterealtime.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://github.com/igniterealtime/Smack/commit/059ee99ba0d5ff7758829acf5a9aeede09ec820b third party advisory patch
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/J4WXAZ4JVJXHMEDDXJVWJHPVBF5QCTZF/ vendor advisory
http://www.securityfocus.com/bid/95129 vdb entry third party advisory
https://issues.igniterealtime.org/projects/SMACK/issues/SMACK-739 issue tracking vendor advisory
https://github.com/igniterealtime/Smack/commit/a9d5cd4a611f47123f9561bc5a81a4555fe7cb04 third party advisory patch
http://www.openwall.com/lists/oss-security/2016/12/22/12 mailing list third party advisory patch
https://community.igniterealtime.org/blogs/ignite/2016/11/22/smack-security-advisory-2016-11-22 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2016-10027?
CVE-2016-10027 has been scored as a medium severity vulnerability.
How to fix CVE-2016-10027?
To fix CVE-2016-10027, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2016-10027 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2016-10027 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.