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CVE-2016-2181
The Anti-Replay feature in the DTLS implementation in OpenSSL before 1.1.0 mishandles early use of a new epoch number in conjunction with…
High7.5EPSS 22.6%
- Published
- Updated
- Reserved
- Assigned by
- redhat
Description
The Anti-Replay feature in the DTLS implementation in OpenSSL before 1.1.0 mishandles early use of a new epoch number in conjunction with a large sequence number, which allows remote attackers to cause a denial of service (false-positive packet drops) via spoofed DTLS records, related to rec_layer_d1.c and ssl3_record.c.
Timeline
ID reserved
By redhat
- 8 months later
· 8 months later
Published
- 8 years later
· 8 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.0 | High7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 22.6% · top 2.3% of all CVEs (8 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Weakness
Affected products
n/a
- affected n/a
References (41)
- 92982 (opens in a new tab)vdb-entryx_transferred
- https://www.tenable.com/security/tns-2016-20 (opens in a new tab)x_transferred
- http://www.splunk.com/view/SP-CAAAPUE (opens in a new tab)x_transferred
- http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html (opens in a new tab)x_transferred
- RHSA-2016:1940 (opens in a new tab)vendor-advisoryx_transferred
- http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2016-3090545.html (opens in a new tab)x_transferred
- https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA40312 (opens in a new tab)x_transferred
- http://www.splunk.com/view/SP-CAAAPSV (opens in a new tab)x_transferred
- http://www-01.ibm.com/support/docview.wss?uid=swg21995039 (opens in a new tab)x_transferred
- http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html (opens in a new tab)x_transferred
- https://www.tenable.com/security/tns-2016-16 (opens in a new tab)x_transferred
- https://www.tenable.com/security/tns-2016-21 (opens in a new tab)x_transferred
- 1036690 (opens in a new tab)vdb-entryx_transferred
- http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html (opens in a new tab)x_transferred
- http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.html (opens in a new tab)x_transferred
- https://git.openssl.org/?p=openssl.git%3Ba=commit%3Bh=1fb9fdc3027b27d8eb6a1e6a846435b070980770 (opens in a new tab)x_transferred
- http://www.oracle.com/technetwork/topics/security/ovmbulletinoct2016-3090547.html (opens in a new tab)x_transferred
- https://bto.bluecoat.com/security-advisory/sa132 (opens in a new tab)x_transferred
- http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.html (opens in a new tab)x_transferred
- FreeBSD-SA-16:26 (opens in a new tab)vendor-advisoryx_transferred
- http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10759 (opens in a new tab)x_transferred
- https://kc.mcafee.com/corporate/index?page=content&id=SB10215 (opens in a new tab)x_transferred
- SUSE-SU-2017:2700 (opens in a new tab)vendor-advisoryx_transferred
- USN-3087-1 (opens in a new tab)vendor-advisoryx_transferred
- SUSE-SU-2016:2469 (opens in a new tab)vendor-advisoryx_transferred
- openSUSE-SU-2016:2537 (opens in a new tab)vendor-advisoryx_transferred
- USN-3087-2 (opens in a new tab)vendor-advisoryx_transferred
- SUSE-SU-2017:2699 (opens in a new tab)vendor-advisoryx_transferred
- openSUSE-SU-2016:2407 (opens in a new tab)vendor-advisoryx_transferred
- 20170717 Orion Elite Hidden IP Browser Pro - All Versions - Multiple Known Vulnerabilities (opens in a new tab)mailing-listx_transferred
- SUSE-SU-2016:2458 (opens in a new tab)vendor-advisoryx_transferred
- https://support.f5.com/csp/article/K59298921 (opens in a new tab)x_transferred
- DSA-3673 (opens in a new tab)vendor-advisoryx_transferred
- openSUSE-SU-2016:2391 (opens in a new tab)vendor-advisoryx_transferred
- openSUSE-SU-2018:0458 (opens in a new tab)vendor-advisoryx_transferred
- SUSE-SU-2016:2387 (opens in a new tab)vendor-advisoryx_transferred
- SUSE-SU-2016:2468 (opens in a new tab)vendor-advisoryx_transferred
- SUSE-SU-2016:2394 (opens in a new tab)vendor-advisoryx_transferred
- http://www.huawei.com/en/psirt/security-advisories/huawei-sa-20170322-01-openssl-en (opens in a new tab)x_transferred
- https://www.arista.com/en/support/advisories-notices/security-advisories/1749-security-advisory-24 (opens in a new tab)x_transferred
- https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf (opens in a new tab)x_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 Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
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[](https://cveledger.app/cve/CVE-2016-2181)Record last updated .