ESB-2019.0273.3 - UPDATE [Debian] rssh: Execute arbitrary code/commands - Existing account 2019-02-25

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             AUSCERT External Security Bulletin Redistribution

                              ESB-2019.0273.3
                           rssh security update
                             25 February 2019

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           rssh
Publisher:         Debian
Operating System:  Debian GNU/Linux 9
Impact/Access:     Execute Arbitrary Code/Commands -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2019-1000018  

Reference:         ESB-2019.0270

Original Bulletin: 
   http://www.debian.org/security/2019/dsa-4377

Revision History:  February 25 2019: Updated with information from DSA-4377-3
                   February 12 2019: Updated packages to resolve regression bug 
                                     introduced in 4377-1
                   January  31 2019: Initial Release

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Debian Security Advisory DSA-4377-1                   security@debian.org
https://www.debian.org/security/                       Moritz Muehlenhoff
January 30, 2019                      https://www.debian.org/security/faq
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Package        : rssh
CVE ID         : CVE-2019-1000018
Debian Bug     : 919623

The ESnet security team discovered a vulnerability in rssh, a restricted
shell that allows users to perform only scp, sftp, cvs, svnserve
(Subversion), rdist and/or rsync operations. Missing validation in the
scp support could result in the bypass of this restriction, allowing the
execution of arbitrary shell commands.

Please note that with the update applied, the "-3" option of scp can no
longer be used.

For the stable distribution (stretch), this problem has been fixed in
version 2.3.4-5+deb9u1.

We recommend that you upgrade your rssh packages.

For the detailed security status of rssh please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/rssh

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/

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Debian Security Advisory DSA-4377-2                   security@debian.org
https://www.debian.org/security/                     Salvatore Bonaccorso
February 11, 2019                     https://www.debian.org/security/faq
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Package        : rssh
Debian Bug     : 921655

The update for rssh issued as DSA 4377-1 introduced a regression that
blocked scp of multiple files from a server using rssh. Updated packages
are now available to correct this issue.

For the stable distribution (stretch), this problem has been fixed in
version 2.3.4-5+deb9u3.

We recommend that you upgrade your rssh packages.

For the detailed security status of rssh please refer to its security
tracker page at:
https://security-tracker.debian.org/tracker/rssh

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/

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- - - -------------------------------------------------------------------------
Debian Security Advisory DSA-4377-3                   security@debian.org
https://www.debian.org/security/                       Moritz Muehlenhoff
February 22, 2019                     https://www.debian.org/security/faq
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Package        : rssh
CVE ID         : CVE-2019-1000018
Debian Bug     : 919623

The restrictions introduced in the security fix to address
CVE-2019-1000018 also disallowed the -pf and -pt options which are used
by the scp support in libssh2. This update restores support for those.

For the stable distribution (stretch), this problem has been fixed in
version 2.3.4-5+deb9u4.

We recommend that you upgrade your rssh packages.

For the detailed security status of rssh please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/rssh

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/


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