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Bug 1376741 - need backport of "use correct digest when exporting keying material." from upstream, RFC violation [rhel-6]
Summary: need backport of "use correct digest when exporting keying material." from up...
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: openssl
Version: 6.8
Hardware: All
OS: Linux
medium
medium
Target Milestone: rc
: ---
Assignee: Tomas Mraz
QA Contact: Stanislav Zidek
URL:
Whiteboard:
Depends On: 1289620
Blocks:
TreeView+ depends on / blocked
 
Reported: 2016-09-16 09:37 UTC by Stanislav Zidek
Modified: 2017-03-21 10:11 UTC (History)
3 users (show)

Fixed In Version: openssl-1.0.1e-51.el6
Doc Type: If docs needed, set a value
Doc Text:
Clone Of: 1289620
Environment:
Last Closed: 2017-03-21 10:11:52 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2017:0660 0 normal SHIPPED_LIVE openssl bug fix update 2017-03-21 12:33:58 UTC

Description Stanislav Zidek 2016-09-16 09:37:34 UTC 
Same problem seems to be present on RHEL-6 (tested both openssl-1.0.1e-42.el6_7.5 and openssl-1.0.1e-48.el6).

::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
:: [   LOG    ] :: TLSv1.2 - ECDHE-RSA-AES128-SHA
::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::

:: [  BEGIN   ] :: Running 'PYTHONPATH=tlslite-ng python -u tlslite-ng/scripts/tls.py server -l EXPORTER-test -L 40 -k localhost.key -c localhost.crt localhost:4433 >server.out 2>server.err &'
:: [   PASS   ] :: Command 'PYTHONPATH=tlslite-ng python -u tlslite-ng/scripts/tls.py server -l EXPORTER-test -L 40 -k localhost.key -c localhost.crt localhost:4433 >server.out 2>server.err &' (Expected 0, got 0)
...
:: [  BEGIN   ] :: Running 'openssl s_client -keymatexport EXPORTER-test -keymatexportlen 40 -connect localhost:4433  -cipher ECDHE-RSA-AES128-SHA </dev/null'
...
Keying material exporter:
    Label: 'EXPORTER-test'
    Length: 40 bytes
    Keying material: FE36CFD8B323213AAD9E00716BA6E82310C1C17E912249B5B23C2A64F48C50BEF21CA8B1F271A004
---
DONE
:: [   PASS   ] :: Command 'openssl s_client -keymatexport EXPORTER-test -keymatexportlen 40 -connect localhost:4433  -cipher ECDHE-RSA-AES128-SHA </dev/null' (Expected 0, got 0)
...
:: [   FAIL   ] :: Check if exporters match (Assert: 'DD7A15A77B9FA3F6F274FE3A1FD204B94353763C648D17979B726A036F9383A1EE7DCBA945A39110' should equal 'FE36CFD8B323213AAD9E00716BA6E82310C1C17E912249B5B23C2A64F48C50BEF21CA8B1F271A004')
:: [  BEGIN   ] :: Running 'cat server.out'
...
  Exporter label: EXPORTER-test
  Exporter length: 40
  Keying material: DD7A15A77B9FA3F6F274FE3A1FD204B94353763C648D17979B726A036F9383A1EE7DCBA945A39110
:: [   PASS   ] :: Command 'cat server.out' (Expected 0, got 0)
...
TLSv1-2-ECDHE-RSA-AES128-SHA result: FAIL

+++ This bug was initially created as a clone of Bug #1289620 +++

Description of problem:

Versions of OpenSSL before 1.0.1h have an issue with incorrect digests when interoperating with certain clients.  It appears that the bug actually causes OpenSSL on RHEL 7 to violate RFC 5246.

The upstream bug report is

    https://rt.openssl.org/Ticket/Display.html?user=guest&pass=guest&id=3319

The one-line patch from upstream that's in 1.0.1h and 1.0.2 is

    https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=4fdf917

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

openssl-1.0.1e-42.el7_1.9
openssl-libs-1.0.1e-42.el7_1.9


Additional info:

This issue can trigger interoperability issues with any client (including devices like mobile phones) that support TLS 1.2 but offer older cipher suites.  Especially on mobile devices, it's often not possible for the user to configure what ciphers their SSL stack prefers.
Comment 6 errata-xmlrpc 2017-03-21 10:11:52 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHBA-2017-0660.html
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