smack: TLS SecurityMode.required bypass via StripTLS attack
Published Jan 12, 2017
5.9
MEDIUMCVSS 3.1
EPSS 1.52%
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.
Affected products
No data.
Configuration 1
- < 4.1.9
Configuration 2
- 25
No data.
Red Hat JBoss BRMS 5
smack
Will not fix
Red Hat JBoss Fuse 6
camel
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat JBoss BRMS 5 | smack | Will not fix | n/a |
| Red Hat JBoss Fuse 6 | camel | Will not fix | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
AV:N/AC:M/Au:N/C:P/I:N/A:N
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.52% (0.01519) | 73.63th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.51% (0.01506) | 70.95th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.45% (0.00448) | 61.46th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.22% (0.00217) | 60.71th | v3 (v2023.03.01) |
| Jun 13, 2024 | 0.22% (0.00217) | 59.88th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.22% (0.00217) | 57.88th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.11% (0.01108) | 55.18th | v2 (v2022.01.01) |
| Sep 17, 2022 | 1.11% (0.01108) | 53.57th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.11% (0.01108) | 51.54th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.11% (0.01108) | 29.61th | v2 (v2022.01.01) |
References (13)
- http://www.openwall.com/lists/oss-security/2016/12/22/12 mailing-listx_refsource_MLISTMailing ListPatchThird Party Advisory
- http://www.securityfocus.com/bid/95129 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://access.redhat.com/security/cve/CVE-2016-10027 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1406703 Issue Tracking
- https://community.igniterealtime.org/blogs/ignite/2016/11/22/smack-security-advisory-2016-11-22 x_refsource_CONFIRMVendor Advisory
- https://github.com/advisories/GHSA-66pq-hqv5-228g Advisory
- https://github.com/igniterealtime/Smack/commit/059ee99ba0d5ff7758829acf5a9aeede09ec820b x_refsource_CONFIRMPatchThird Party Advisory
- https://github.com/igniterealtime/Smack/commit/a9d5cd4a611f47123f9561bc5a81a4555fe7cb04 x_refsource_CONFIRMPatchThird Party Advisory
- https://issues.igniterealtime.org/projects/SMACK/issues/SMACK-739 x_refsource_CONFIRMIssue TrackingVendor Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/J4WXAZ4JVJXHMEDDXJVWJHPVBF5QCTZF vendor-advisoryx_refsource_FEDORA
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/J4WXAZ4JVJXHMEDDXJVWJHPVBF5QCTZF
- https://nvd.nist.gov/vuln/detail/CVE-2016-10027
- https://www.cve.org/CVERecord?id=CVE-2016-10027
Change history (0)
No recorded changes yet.