Description
The DTLS implementation in OpenSSL before 0.9.8s and 1.x before 1.0.0f performs a MAC check only if certain padding is valid, which makes it easier for remote attackers to recover plaintext via a padding oracle attack.
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 | 1.0.0f-1 | — |
| Debian 13 | openssl | 1.0.0f-1 | — |
| Debian 12 | openssl | 1.0.0f-1 | — |
| Debian 6.0 | openssl | 0.9.8o-4squeeze5 | DSA-2390-1 |
| Debian 5.0 | openssl | 0.9.8g-15+lenny15 | DSA-2390-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 6 | openssl +3 | 1.0.0-20.el6_2.1 | RHSA-2012:0059 |
| RHEL 5 | openssl +2 | 0.9.8e-20.el5_7.1 | RHSA-2012:0060 |
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 |
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 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | openssl-1_1 | 1.1.1l-1.2 | openSUSE-SU-2024:11127-1 |
Advisories 6
- RHSA-2012:0060 Red Hat Security Advisory: openssl security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2012:0059 Red Hat Security Advisory: openssl security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- DSA-2390-1 openssl - several 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-403 Security update for OpenSSL SUSE / openSUSE Security Updates · Feb 4, 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
References
- 48528 third-party-advisory
- 57260 third-party-advisory
- HPSBMU02786 vendor-advisory
- http://www-01.ibm.com/support/docview.wss?uid=ssg1S1004564
- openSUSE-SU-2012:0083 vendor-advisory
- MDVSA-2012:006 vendor-advisory
- FEDORA-2012-18035 vendor-advisory
- http://www.openssl.org/news/secadv_20120104.txt
- SUSE-SU-2012:0084 vendor-advisory
- RHSA-2012:1308 vendor-advisory
- RHSA-2012:1307 vendor-advisory
- http://www.isg.rhul.ac.uk/~kp/dtls.pdf
- http://support.apple.com/kb/HT5784
- SUSE-SU-2014:0320 vendor-advisory
- APPLE-SA-2013-06-04-1 vendor-advisory
- VU#737740 third-party-advisory
- HPSBUX02734 vendor-advisory
- MDVSA-2012:007 vendor-advisory
- RHSA-2012:1306 vendor-advisory
- HPSBOV02793 vendor-advisory
- 57353 third-party-advisory
- SSRT100852 vendor-advisory
- DSA-2390 vendor-advisory
- http://aix.software.ibm.com/aix/efixes/security/openssl_advisory3.asc
- https://security.paloaltonetworks.com/CVE-2011-4108