91d1d749e2
EN-19:10.scp: Fix revision number. SA-19:07.mds: Fix quoting issue in HT disable example. Approved by: so
130 lines
4.6 KiB
Text
130 lines
4.6 KiB
Text
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=============================================================================
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FreeBSD-EN-19:10.scp Errata Notice
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The FreeBSD Project
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Topic: Insufficient filename validation in scp(1) client
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Category: contrib
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Module: scp
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Announced: 2019-05-14
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Affects: All supported versions of FreeBSD.
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Corrected: 2019-05-07 19:48:39 UTC (stable/12, 12.0-STABLE)
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2019-05-14 22:54:17 UTC (releng/12.0, 12.0-RELEASE-p4)
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CVE Name: CVE-2019-6111
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For general information regarding FreeBSD Errata Notices and Security
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Advisories, including descriptions of the fields above, security
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branches, and the following sections, please visit
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<URL:https://security.FreeBSD.org/>.
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0. Revision history
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v1.0 Initial release.
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v1.1 Correct patch level for 12.0-RELEASE.
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I. Background
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scp(1) is a file transfer protocol running over an SSH session.
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II. Problem Description
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The scp(1) client implementation fails to verify if the objects returned by
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the server match what was requested.
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III. Impact
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A malicious scp server can write arbitrary files to the client.
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IV. Workaround
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Switch to using the sftp(1) client, if possible.
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V. Solution
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Note: While stable/11 and its release branches are currently affected by this
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errata, due to the lack of patches, no fix is currently available for
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stable/11. We are currently evaluating a backport for these fixes to
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stable/11.
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Perform one of the following:
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1) Upgrade your system to a supported FreeBSD stable or release / security
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branch (releng) dated after the correction date.
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2) To update your system via a binary patch:
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Systems running a RELEASE version of FreeBSD on the i386 or amd64
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platforms can be updated via the freebsd-update(8) utility:
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# freebsd-update fetch
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# freebsd-update install
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3) To update your system via a source code patch:
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The following patches have been verified to apply to the applicable
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FreeBSD release branches.
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a) Download the relevant patch from the location below, and verify the
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detached PGP signature using your PGP utility.
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[FreeBSD 12.0]
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# fetch https://security.FreeBSD.org/patches/EN-19:10/scp.patch
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# fetch https://security.FreeBSD.org/patches/EN-19:10/scp.patch.asc
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# gpg --verify scp.patch.asc
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b) Apply the patch. Execute the following commands as root:
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# cd /usr/src
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# patch < /path/to/patch
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c) Recompile the operating system using buildworld and installworld as
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described in <URL:https://www.FreeBSD.org/handbook/makeworld.html>.
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VI. Correction details
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The following list contains the correction revision numbers for each
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affected branch.
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Branch/path Revision
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- -------------------------------------------------------------------------
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stable/12/ r347232
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releng/12.0/ r347586
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- -------------------------------------------------------------------------
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To see which files were modified by a particular revision, run the
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following command, replacing NNNNNN with the revision number, on a
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machine with Subversion installed:
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# svn diff -cNNNNNN --summarize svn://svn.freebsd.org/base
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Or visit the following URL, replacing NNNNNN with the revision number:
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<URL:https://svnweb.freebsd.org/base?view=revision&revision=NNNNNN>
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VII. References
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<URL:https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-6111>
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The latest revision of this advisory is available at
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<URL:https://security.FreeBSD.org/advisories/FreeBSD-EN-19:10.scp.asc>
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