CVE-2016-10027: Race Condition
First published: Thu Jan 12 2017(Updated: )
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.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Ignite Realtime Smack | <4.1.9 | |
| Fedora | =25 |
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Reference Links
- http://www.openwall.com/lists/oss-security/2016/12/22/12
- http://www.securityfocus.com/bid/95129
- https://community.igniterealtime.org/blogs/ignite/2016/11/22/smack-security-advisory-2016-11-22
- https://github.com/igniterealtime/Smack/commit/059ee99ba0d5ff7758829acf5a9aeede09ec820b
- https://github.com/igniterealtime/Smack/commit/a9d5cd4a611f47123f9561bc5a81a4555fe7cb04
- https://issues.igniterealtime.org/projects/SMACK/issues/SMACK-739
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/J4WXAZ4JVJXHMEDDXJVWJHPVBF5QCTZF/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/J4WXAZ4JVJXHMEDDXJVWJHPVBF5QCTZF/
Frequently Asked Questions
What is the severity of CVE-2016-10027?
CVE-2016-10027 is classified as a medium severity vulnerability due to its potential to allow man-in-the-middle attacks.
How do I fix CVE-2016-10027?
To fix CVE-2016-10027, upgrade the Smack library to version 4.1.9 or later.
Which versions of Smack are affected by CVE-2016-10027?
CVE-2016-10027 affects all Smack versions prior to 4.1.9.
What type of attack does CVE-2016-10027 allow?
CVE-2016-10027 allows man-in-the-middle attackers to bypass TLS protections.
Is Fedora 25 affected by CVE-2016-10027?
Yes, Fedora 25 is affected by CVE-2016-10027 if it uses a vulnerable version of the Smack library.
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