Medium severity · published Jan 12, 2017
CVE-2016-10027
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…
5.9
CVSS
1.5%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.5% · higher than 74% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FE
Fedora · Fedoraproject
25 · source: NVD
SM
Smack · Igniterealtime
before 4.1.9 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2016-10027
CVE.org
https://www.cve.org/CVERecord?id=CVE-2016-10027
Mailing List
http://www.openwall.com/lists/oss-security/2016/12/22/12
Third Party Advisory
http://www.securityfocus.com/bid/95129
Vendor Advisory
https://community.igniterealtime.org/blogs/ignite/2016/11/22/smack-security-advisory-2016-11-22
Patch
https://github.com/igniterealtime/Smack/commit/059ee99ba0d5ff7758829acf5a9aeede09ec820b
Patch
https://github.com/igniterealtime/Smack/commit/a9d5cd4a611f47123f9561bc5a81a4555fe7cb04
Issue Tracking
https://issues.igniterealtime.org/projects/SMACK/issues/SMACK-739
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