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Bug#919101: marked as done (openssh: CVE-2018-20685: scp.c in the scp client allows remote SSH servers to bypass intended access restrictions)

Your message dated Sat, 09 Feb 2019 21:47:35 +0000
with message-id <E1gsaTH-0003Or-JR@fasolo.debian.org>
and subject line Bug#919101: fixed in openssh 1:7.4p1-10+deb9u5
has caused the Debian Bug report #919101,
regarding openssh: CVE-2018-20685: scp.c in the scp client allows remote SSH servers to bypass intended access restrictions
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

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-- 
919101: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=919101
Debian Bug Tracking System
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--- Begin Message --- 
Source: openssh
Version: 1:7.9p1-4
Severity: important
Tags: patch security upstream
Control: found -1 1:7.4p1-10
Control: found -1 1:7.4p1-10+deb9u4

Hi,

The following vulnerability was published for openssh.

CVE-2018-20685[0]:
| In OpenSSH 7.9, scp.c in the scp client allows remote SSH servers to
| bypass intended access restrictions via the filename of . or an empty
| filename.

More information are found in [1], where upstream fixed it in [2].
There are related issues described in [1] which I explicitly do not
track in this bug as they are yet not addressed upstream (and did not
want to mix report). They are described in [1] as issues #2, #3 and #4
and got own CVEs (CVE-2019-6109, CVE-2019-6110, CVE-2019-6111). Not
sure if upstream intends to adress those as well.

The described vulnerabilities would require that a victim accepts the
wrong host fingerpring though of a man-in-the mittle attacker server.

If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2018-20685
    https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-20685
[1] https://sintonen.fi/advisories/scp-client-multiple-vulnerabilities.txt
[2] https://github.com/openssh/openssh-portable/commit/6010c0303a422a9c5fa8860c061bf7105eb7f8b2

Please adjust the affected versions in the BTS as needed.

Regards,
Salvatore

--- End Message ---
--- Begin Message --- 
Source: openssh
Source-Version: 1:7.4p1-10+deb9u5

We believe that the bug you reported is fixed in the latest version of
openssh, which is due to be installed in the Debian FTP archive.

A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 919101@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Yves-Alexis Perez <corsac@debian.org> (supplier of updated openssh package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@ftp-master.debian.org)


-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512

Format: 1.8
Date: Fri, 08 Feb 2019 15:25:55 +0100
Source: openssh
Binary: openssh-client openssh-client-ssh1 openssh-server openssh-sftp-server ssh ssh-krb5 ssh-askpass-gnome openssh-client-udeb openssh-server-udeb
Architecture: source
Version: 1:7.4p1-10+deb9u5
Distribution: stretch-security
Urgency: high
Maintainer: Debian OpenSSH Maintainers <debian-ssh@lists.debian.org>
Changed-By: Yves-Alexis Perez <corsac@debian.org>
Description:
 openssh-client - secure shell (SSH) client, for secure access to remote machines
 openssh-client-ssh1 - secure shell (SSH) client for legacy SSH1 protocol
 openssh-client-udeb - secure shell client for the Debian installer (udeb)
 openssh-server - secure shell (SSH) server, for secure access from remote machines
 openssh-server-udeb - secure shell server for the Debian installer (udeb)
 openssh-sftp-server - secure shell (SSH) sftp server module, for SFTP access from remot
 ssh        - secure shell client and server (metapackage)
 ssh-askpass-gnome - interactive X program to prompt users for a passphrase for ssh-ad
 ssh-krb5   - secure shell client and server (transitional package)
Closes: 793412 919101
Changes:
 openssh (1:7.4p1-10+deb9u5) stretch; urgency=high
 .
   * Non-maintainer upload by the Security Team.
   * CVE-2018-20685: disallow empty filenames or ones that refer to the current
     directory (Closes: #919101)
   * CVE-2019-6109: sanitize scp filenames via snmprintf (Closes: #793412)
   * CVE-2019-6111: check in scp client that filenames sent during
     remote->local directory copies satisfy the wildcards specified by the user
Checksums-Sha1:
 2d038f4859239b51adbee98682205f463261b664 2579 openssh_7.4p1-10+deb9u5.dsc
 72bea04dd41ffc65144ab64ac403736a22f39c2a 168672 openssh_7.4p1-10+deb9u5.debian.tar.xz
Checksums-Sha256:
 ee597af8d79c7d06c861d6b93c0a0815043bb3af38610a1fccc75586025cdf26 2579 openssh_7.4p1-10+deb9u5.dsc
 9f7c9e08e1a3b4dfe974a700be18919c2f03e6e22d1284999c101147d2f636f7 168672 openssh_7.4p1-10+deb9u5.debian.tar.xz
Files:
 17d02f62aa25e2294dfd4c66ac32a57b 2579 net standard openssh_7.4p1-10+deb9u5.dsc
 7cc33cd435d3811e856ba631724620da 168672 net standard openssh_7.4p1-10+deb9u5.debian.tar.xz

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