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Bug 1367043 - Security vulnerability MSVR-1499: Bad DH p parameter in OpenSSL
Summary: Security vulnerability MSVR-1499: Bad DH p parameter in OpenSSL
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: socat
Version: 7.4
Hardware: Unspecified
OS: Unspecified
Target Milestone: rc
: ---
Assignee: Paul Wouters
QA Contact: BaseOS QE Security Team
Depends On:
TreeView+ depends on / blocked
Reported: 2016-08-15 11:28 UTC by Gerd v. Egidy
Modified: 2016-10-04 18:37 UTC (History)
0 users

Fixed In Version:
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Last Closed: 2016-10-04 18:37:40 UTC
Target Upstream Version:

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Description Gerd v. Egidy 2016-08-15 11:28:54 UTC
Description of problem:
From Socat security advisory 7, MSVR-1499:

In the OpenSSL address implementation the hard coded 1024 bit DH p parameter was not prime. The effective cryptographic strength of a key exchange using these parameters was weaker than the one one could get by using a prime p. Moreover, since there is no indication of how these parameters were chosen, the existence of a trapdoor that makes possible for an eavesdropper to recover the shared secret from a key exchange that uses them cannot be ruled out.

Please release an update containing this fix.

Version-Release number of selected component (if applicable):

Comment 3 Paul Wouters 2016-10-04 18:37:40 UTC
Closing, as no RHEL version is affected, an any rebase for rhel-7.4 will be for a newer version that includes this fix.

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