Description
The dtls1_get_message_fragment function in d1_both.c in OpenSSL before 0.9.8za, 1.0.0 before 1.0.0m, and 1.0.1 before 1.0.1h allows remote attackers to cause a denial of service (recursion and client crash) via a DTLS hello message in an invalid DTLS handshake.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | openssl | 1.0.1h-1 | — |
| Debian 13 | openssl | 1.0.1h-1 | — |
| Debian 12 | openssl | 1.0.1h-1 | — |
| Debian 7 | openssl | 1.0.1e-2+deb7u10 | DSA-2950-1 |
| Debian 6.0 | openssl | 0.9.8o-4squeeze15 | DLA-0003-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | openssl | 1.0.1f-1ubuntu2.2 | USN-2232-1 |
| Ubuntu 14.04 LTS | openssl098 | 0.9.8o-7ubuntu3.2.14.04.1 | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | openssl +4 | 1:1.0.1e-34.el7_0.3 | RHSA-2014:0679 |
| RHEL 6 | openssl +3 | 1.0.1e-16.el6_5.14 | RHSA-2014:0625 |
| RHEL 5 | openssl +2 | 0.9.8e-27.el5_10.4 | RHSA-2014:1053 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Gluster Storage 2 | openssl +3 | 1.0.1e-16.el6_5.14 | RHSA-2014:0628 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP1 | libqt4 +1 | 4.8.6-7.1 | SUSE-SU-403 Forbidden-1, SUSE-SU-403 |
| SLES 12 SP1 | libqt4-devel-doc | 4.8.6-7.3 | SUSE-SU-403 Forbidden-1, SUSE-SU-403 |
| SLES 12 | libqt4 +1 | 4.8.6-7.1 | SUSE-SU-403 Forbidden-1, SUSE-SU-403 |
| SLES 12 | libqt4-devel-doc | 4.8.6-7.3 | SUSE-SU-403 Forbidden-1, SUSE-SU-403 |
| SLES 12 | mariadb | 10.0.16-15.1 | SUSE-SU-2015:0743-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP1 | libqt4 +1 | 4.8.6-7.1 | SUSE-SU-403 Forbidden-1, SUSE-SU-403 |
| SLES for SAP 12 SP1 | libqt4-devel-doc | 4.8.6-7.3 | SUSE-SU-403 Forbidden-1, SUSE-SU-403 |
| SLES for SAP 12 | libqt4 +1 | 4.8.6-7.1 | SUSE-SU-403 Forbidden-1, SUSE-SU-403 |
| SLES for SAP 12 | libqt4-devel-doc | 4.8.6-7.3 | SUSE-SU-403 Forbidden-1, SUSE-SU-403 |
| SLES for SAP 12 | mariadb | 10.0.16-15.1 | SUSE-SU-2015:0743-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | openssl-1_1 | 1.1.1l-1.2 | openSUSE-SU-2024:11127-1 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | openssl +4 | 1:1.0.1e-34.el7_0.3 | ELSA-2014-0679 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
GitHub 1 repository
-
tpdlshdmlrkfmcla/OpenSSL_DTLS_CVE_2014_0221 ★ 0 · Feb 23, 2025
OpenSSL DTLS CVE-2014-0221 Remote Denial
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 13
- RHSA-2014:0679 Red Hat Security Advisory: openssl security update Red Hat Security Advisories (RHSA) · Aug 5, 2026
- RHSA-2014:0625 Red Hat Security Advisory: openssl security update Red Hat Security Advisories (RHSA) · Aug 5, 2026
- RHSA-2014:0628 Red Hat Security Advisory: openssl security update Red Hat Security Advisories (RHSA) · Aug 5, 2026
- RHSA-2014:1053 Red Hat Security Advisory: openssl security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- USN-2232-1 openssl vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-2950-1 openssl - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-0003-1 openssl - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-403 Forbidden-1 Security update for OpenSSL SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2015:0743-1 Security update for mariadb SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-403 Security update for OpenSSL SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2026-0180 Dell Data Protection Advisor: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jan 20, 2026
- openSUSE-SU-2024:11127-1 libopenssl-1_1-devel-1.1.1l-1.2 on GA media SUSE / openSUSE Security Updates · May 7, 2025
- ELSA-2014-0679 Important: openssl security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Jul 23, 2014
References
- 59342 third-party-advisory
- 59669 third-party-advisory
- http://www.novell.com/support/kb/doc.php?id=7015300
- 59990 third-party-advisory
- 1030337 vdb-entry
- 59454 third-party-advisory
- 59126 third-party-advisory
- http://www.novell.com/support/kb/doc.php?id=7015264
- 59306 third-party-advisory
- http://www-01.ibm.com/support/docview.wss?uid=swg21678289
- http://www.vmware.com/security/advisories/VMSA-2014-0012.html
- HPSBUX03046 vendor-advisory
- 61254 third-party-advisory
- http://www14.software.ibm.com/webapp/set2/subscriptions/pqvcmjd?mode=18&ID=6061&myns=phmc&mync=E
- 59895 third-party-advisory
- 59449 third-party-advisory
- http://www-01.ibm.com/support/docview.wss?uid=isg400001843
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05301946
- HPSBOV03047 vendor-advisory
- http://www-01.ibm.com/support/docview.wss?uid=swg21676879
- http://www-01.ibm.com/support/docview.wss?uid=swg21677828
- 59441 third-party-advisory
- HPSBMU03074 vendor-advisory
- 59189 third-party-advisory
- MDVSA-2014:106 vendor-advisory
- 59300 third-party-advisory
- GLSA-201407-05 vendor-advisory
- 59284 third-party-advisory
- http://www.ibm.com/support/docview.wss?uid=swg24037783
- 59365 third-party-advisory
- http://www-01.ibm.com/support/docview.wss?uid=swg21677695
- 20141205 NEW: VMSA-2014-0012 - VMware vSphere product updates address security vulnerabilities mailing-list
- 59495 third-party-advisory
- http://www-01.ibm.com/support/docview.wss?uid=nas8N1020163
- http://www-01.ibm.com/support/docview.wss?uid=swg21676889
- FEDORA-2014-9308 vendor-advisory
- 58945 third-party-advisory
- http://www-01.ibm.com/support/docview.wss?uid=isg400001841
- 59659 third-party-advisory
- openSUSE-SU-2016:0640 vendor-advisory
- 59429 third-party-advisory
- http://www.oracle.com/technetwork/topics/security/cpujan2015-1972971.html
- 59655 third-party-advisory
- http://www-01.ibm.com/support/docview.wss?uid=swg21676071
- 59437 third-party-advisory
- http://www-947.ibm.com/support/entry/portal/docdisplay?lndocid=MIGR-5095754
- http://www.vmware.com/security/advisories/VMSA-2014-0006.html
- 59310 third-party-advisory
- http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html
- http://aix.software.ibm.com/aix/efixes/security/openssl_advisory9.asc
- http://www.fortiguard.com/advisory/FG-IR-14-018/
- SUSE-SU-2015:0743 vendor-advisory
- http://www.ibm.com/support/docview.wss?uid=swg21676793
- http://www.ibm.com/support/docview.wss?uid=swg21676356
- HPSBMU03057 vendor-advisory
- http://support.citrix.com/article/CTX140876
- 59167 third-party-advisory
- 59120 third-party-advisory
- http://www-947.ibm.com/support/entry/portal/docdisplay?lndocid=MIGR-5095757
- HPSBMU03069 vendor-advisory