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The Linux kernel security team has been accused of rejecting the idea of security embargoes. This is incorrect, and could dissuade people from reporting security issues to us under the false assumption that the issue would leak prematurely. Clarify the handling of embargoed information in our process documentation. Co-developed-by: Ingo Molnar <mingo@kernel.org> Acked-by: Kees Cook <keescook@chromium.org> Acked-by: Peter Zijlstra <peterz@infradead.org> Acked-by: Laura Abbott <labbott@redhat.com> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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.. _securitybugs:
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Security bugs
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=============
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Linux kernel developers take security very seriously. As such, we'd
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like to know when a security bug is found so that it can be fixed and
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disclosed as quickly as possible. Please report security bugs to the
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Linux kernel security team.
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Contact
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-------
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The Linux kernel security team can be contacted by email at
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<security@kernel.org>. This is a private list of security officers
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who will help verify the bug report and develop and release a fix.
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If you already have a fix, please include it with your report, as
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that can speed up the process considerably. It is possible that the
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security team will bring in extra help from area maintainers to
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understand and fix the security vulnerability.
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As it is with any bug, the more information provided the easier it
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will be to diagnose and fix. Please review the procedure outlined in
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admin-guide/reporting-bugs.rst if you are unclear about what
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information is helpful. Any exploit code is very helpful and will not
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be released without consent from the reporter unless it has already been
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made public.
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Disclosure and embargoed information
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------------------------------------
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The security list is not a disclosure channel. For that, see Coordination
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below.
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Once a robust fix has been developed, our preference is to release the
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fix in a timely fashion, treating it no differently than any of the other
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thousands of changes and fixes the Linux kernel project releases every
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month.
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However, at the request of the reporter, we will postpone releasing the
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fix for up to 5 business days after the date of the report or after the
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embargo has lifted; whichever comes first. The only exception to that
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rule is if the bug is publicly known, in which case the preference is to
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release the fix as soon as it's available.
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Whilst embargoed information may be shared with trusted individuals in
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order to develop a fix, such information will not be published alongside
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the fix or on any other disclosure channel without the permission of the
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reporter. This includes but is not limited to the original bug report
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and followup discussions (if any), exploits, CVE information or the
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identity of the reporter.
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In other words our only interest is in getting bugs fixed. All other
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information submitted to the security list and any followup discussions
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of the report are treated confidentially even after the embargo has been
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lifted, in perpetuity.
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Coordination
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------------
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Fixes for sensitive bugs, such as those that might lead to privilege
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escalations, may need to be coordinated with the private
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<linux-distros@vs.openwall.org> mailing list so that distribution vendors
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are well prepared to issue a fixed kernel upon public disclosure of the
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upstream fix. Distros will need some time to test the proposed patch and
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will generally request at least a few days of embargo, and vendor update
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publication prefers to happen Tuesday through Thursday. When appropriate,
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the security team can assist with this coordination, or the reporter can
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include linux-distros from the start. In this case, remember to prefix
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the email Subject line with "[vs]" as described in the linux-distros wiki:
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<http://oss-security.openwall.org/wiki/mailing-lists/distros#how-to-use-the-lists>
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CVE assignment
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--------------
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The security team does not normally assign CVEs, nor do we require them
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for reports or fixes, as this can needlessly complicate the process and
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may delay the bug handling. If a reporter wishes to have a CVE identifier
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assigned ahead of public disclosure, they will need to contact the private
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linux-distros list, described above. When such a CVE identifier is known
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before a patch is provided, it is desirable to mention it in the commit
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message if the reporter agrees.
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Non-disclosure agreements
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-------------------------
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The Linux kernel security team is not a formal body and therefore unable
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to enter any non-disclosure agreements.
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