Quoting form the draft of OpenSSL upstream advisory: Padding oracle in AES-NI CBC MAC check (CVE-2016-2107) ====================================================== Severity: High A MITM attacker can use a padding oracle attack to decrypt traffic when the connection uses an AES CBC cipher and the server support AES-NI. This issue was introduced as part of the fix for Lucky 13 padding attack (CVE-2013-0169). The padding check was rewritten to be in constant time by making sure that always the same bytes are read and compared against either the MAC or padding bytes. But it no longer checked that there was enough data to have both the MAC and padding bytes. OpenSSL 1.0.2 users should upgrade to 1.0.2h OpenSSL 1.0.1 users should upgrade to 1.0.1t This issue was reported to OpenSSL on 13th of April 2016 by Juraj Somorovsky. The fix was developed by Kurt Roeckx of the OpenSSL development team.
Acknowledgments: Name: the OpenSSL project Upstream: Juraj Somorovsky
Created attachment 1151920 [details] OpenSSL upstream fix
External References: https://openssl.org/news/secadv/20160503.txt
Created openssl101e tracking bugs for this issue: Affects: epel-5 [bug 1332590]
Created openssl tracking bugs for this issue: Affects: fedora-all [bug 1332588]
Created mingw-openssl tracking bugs for this issue: Affects: fedora-all [bug 1332589] Affects: epel-7 [bug 1332591]
Upstream commit: 1.0.1 https://git.openssl.org/?p=openssl.git;a=commitdiff;h=4159f311671cf3bac03815e5de44681eb758304a 1.0.2 https://git.openssl.org/?p=openssl.git;a=commitdiff;h=68595c0c2886e7942a14f98c17a55a88afb6c292
openssl-1.0.2h-1.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.
Detailed write-up from the original reporter: http://web-in-security.blogspot.com/2016/05/curious-padding-oracle-in-openssl-cve.html Detailed independent analysis of the issue: https://blog.cloudflare.com/yet-another-padding-oracle-in-openssl-cbc-ciphersuites/
openssl-1.0.2h-1.fc24 has been pushed to the Fedora 24 stable repository. If problems still persist, please make note of it in this bug report.
This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Via RHSA-2016:0722 https://rhn.redhat.com/errata/RHSA-2016-0722.html
This issue has been addressed in the following products: Red Hat Enterprise Linux 6 Via RHSA-2016:0996 https://rhn.redhat.com/errata/RHSA-2016-0996.html
openssl-1.0.1k-15.fc22 has been pushed to the Fedora 22 stable repository. If problems still persist, please make note of it in this bug report.
openssl101e-1.0.1e-8.el5 has been pushed to the Fedora EPEL 5 stable repository. If problems still persist, please make note of it in this bug report.
Hello Team, Customer is requesting for backporting of this fix of openssl into 6.7 (EUS). Please check
This issue has been addressed in the following products: Red Hat Enterprise Linux 6.7 Extended Update Support Via RHSA-2016:2073 https://rhn.redhat.com/errata/RHSA-2016-2073.html
(In reply to errata-xmlrpc from comment #22) > This issue has been addressed in the following products: > > Red Hat Enterprise Linux 6.7 Extended Update Support > > Via RHSA-2016:2073 https://rhn.redhat.com/errata/RHSA-2016-2073.html This makes this bugzilla appear to have been addressed, but the status is still "NEW". I've got a customer that confirmed this patch is in their RHEL6.7 EUS patches that they received via the normal RHN stream. Should this bug have been closed by now?
This issue has been addressed in the following products: Via RHSA-2016:2957 https://rhn.redhat.com/errata/RHSA-2016-2957.html