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29 lines
1.0 KiB
ReStructuredText
2016-01-15 - OpenSSL Vulnerabilities (SLOTH)
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============================================
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A detailed description of this issue can be seen in the following blog posting: http://www.mitls.org/pages/attacks/SLOTH
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Advisory CVEs
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-------------
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`CVE-2015-7575 <https://access.redhat.com/security/cve/CVE-2015-7575>`_ - TLS 1.2 Transcipt Collision attacks against MD5 in key exchange protocol (SLOTH)
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Action
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------
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xCAT uses OpenSSL for client-server communication but **does not** ship it.
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It is highly recommended to keep your OpenSSL levels up-to-date with the indicated versions in the security bulletins to prevent any potential security threats. Obtain the updated software packages from your Operating system distribution channels.
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Disable MD5 authentication in the cipher list using the site table keyword ``xcatsslciphers``.
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1. Check if MD5 is already disabled: ``tabdump site | grep xcatssl``
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2. If nothing is set, add ``ALL:!MD5`` to the cipher list: ``chtab key=xcatsslciphers site.value='ALL:!MD5'``
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3. Restart xcat: ``service xcatd restart``
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