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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…
Medium5.9EPSS 1.5%
- Published
- Updated
- Reserved
- Assigned by
- mitre
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N |
- EPSS (exploitation in 30 days)
- 1.5% · top 26% of all CVEs (2 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.9.
Weakness
Affected products
n/a
- affected n/a
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- Mavenorg.igniterealtime.smack:smack-coreGHSA-66pq-hqv5-228g (opens in a new tab)
References (7)
- https://github.com/igniterealtime/Smack/commit/059ee99ba0d5ff7758829acf5a9aeede09ec820b (opens in a new tab)x_refsource_CONFIRMx_transferred
- FEDORA-2016-897a1e6698 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- 95129 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- https://issues.igniterealtime.org/projects/SMACK/issues/SMACK-739 (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://github.com/igniterealtime/Smack/commit/a9d5cd4a611f47123f9561bc5a81a4555fe7cb04 (opens in a new tab)x_refsource_CONFIRMx_transferred
- [oss-security] 20161222 Re: CVE Request: Smack: TLS SecurityMode.required not always enforced, leading to striptls attack (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- https://community.igniterealtime.org/blogs/ignite/2016/11/22/smack-security-advisory-2016-11-22 (opens in a new tab)x_refsource_CONFIRMx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-66pq-hqv5-228g (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Record last updated .