#VU114054 Race condition in Smack - CVE-2016-10027
Published: August 14, 2025
Vulnerability identifier: #VU114054
Vulnerability risk: High
CVSSv4.0: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2016-10027
CWE-ID: CWE-362
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Smack
Smack
Software vendor:
Ignite Realtime
Ignite Realtime
Description
The vulnerability allows a remote attacker to escalate privileges on the system.
The vulnerability exists due to a race condition in the XMPP library in Smack, when the SecurityMode.required TLS setting has been set. A remote attacker can exploit the race to bypass TLS protections and trigger use of cleartext for client authentication by stripping the "starttls" feature from a server response.
Remediation
Install updates from vendor's website.
External 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/