Red Hat Bugzilla – Bug 1047840
CVE-2013-6450 openssl: crash in DTLS renegotiation after packet loss
Last modified: 2015-10-15 14:09:24 EDT
Common Vulnerabilities and Exposures assigned an identifier CVE-2013-6450 to the following vulnerability:
The DTLS retransmission implementation in OpenSSL through 0.9.8y and 1.x through 1.0.1e does not properly maintain data structures for digest and encryption contexts, which might allow man-in-the-middle attackers to trigger the use of a different context by interfering with packet delivery, related to ssl/d1_both.c and ssl/t1_enc.c.
Created mingw32-openssl tracking bugs for this issue:
Affects: epel-5 [bug 1047845]
Created openssl tracking bugs for this issue:
Affects: fedora-all [bug 1047843]
Created mingw-openssl tracking bugs for this issue:
Affects: fedora-all [bug 1047844]
Upstream bug link:
OpenSSL 0.9.8 is not affected.
Issue was fixed in upstream version 1.0.1f and 1.0.0l:
DTLS protocol support is not available in openssl packages in Red Hat Enterprise Linux 4 and earlier. Red Hat Enterprise Linux 5 uses openssl 0.9.8, which is not affected (see comment 7).
This issue did not affect the versions of openssl as shipped with Red Hat Enterprise Linux 5 and earlier.
This issue has been addressed in following products:
Red Hat Enterprise Linux 6
Via RHSA-2014:0015 https://rhn.redhat.com/errata/RHSA-2014-0015.html
(In reply to Mark J. Cox (Security Engineering) from comment #7)
> OpenSSL 0.9.8 is not affected.
More details in post from upstream developer:
openssl-1.0.1e-37.fc19 has been pushed to the Fedora 19 stable repository. If problems still persist, please make note of it in this bug report.
openssl-1.0.1e-37.fc20 has been pushed to the Fedora 20 stable repository. If problems still persist, please make note of it in this bug report.
openssl-1.0.1e-37.fc18 has been pushed to the Fedora 18 stable repository. If problems still persist, please make note of it in this bug report.
SUSE was reporting  some crashes with a patched openssl, so I wanted to clarify here that they were missing part of the required fix.
In addition to the upstream commit noted in comment #0:
Upstream also indicated  that this patch was required:
We have this patch in our openssl-1.0.1e-cve-2013-6450.patch which was applied to Red Hat Enterprise Linux 6's fix, as noted above.
So the problems that SUSE was describing would not affect Red Hat Enterprise Linux 6.