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-------- Mensagem encaminhada --------
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<th valign="BASELINE" nowrap="nowrap" align="RIGHT">Assunto:
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<td>[USN-2912-1] libssh vulnerabilities</td>
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<th valign="BASELINE" nowrap="nowrap" align="RIGHT">Data: </th>
<td>Tue, 23 Feb 2016 10:03:56 -0500</td>
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<th valign="BASELINE" nowrap="nowrap" align="RIGHT">De: </th>
<td>Marc Deslauriers <a class="moz-txt-link-rfc2396E" href="mailto:marc.deslauriers@canonical.com"><marc.deslauriers@canonical.com></a></td>
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<th valign="BASELINE" nowrap="nowrap" align="RIGHT">Responder
a: </th>
<td><a class="moz-txt-link-abbreviated" href="mailto:ubuntu-users@lists.ubuntu.com">ubuntu-users@lists.ubuntu.com</a>, Ubuntu Security
<a class="moz-txt-link-rfc2396E" href="mailto:security@ubuntu.com"><security@ubuntu.com></a></td>
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<th valign="BASELINE" nowrap="nowrap" align="RIGHT">Para: </th>
<td><a class="moz-txt-link-abbreviated" href="mailto:ubuntu-security-announce@lists.ubuntu.com">ubuntu-security-announce@lists.ubuntu.com</a></td>
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<pre>==========================================================================
Ubuntu Security Notice USN-2912-1
February 23, 2016
libssh vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 15.10
- Ubuntu 14.04 LTS
- Ubuntu 12.04 LTS
Summary:
Several security issues were fixed in libssh.
Software Description:
- libssh: A tiny C SSH library
Details:
Mariusz Ziulek discovered that libssh incorrectly handled certain packets.
A remote attacker could possibly use this issue to cause libssh to crash,
resulting in a denial of service.
(CVE-2015-3146)
Aris Adamantiadis discovered that libssh incorrectly generated ephemeral
secret keys of 128 bits instead of the recommended 1024 or 2048 bits when
using the diffie-hellman-group1 and diffie-hellman-group14 methods. If a
remote attacker were able to perform a man-in-the-middle attack, this flaw
could be exploited to view sensitive information. (CVE-2016-0739)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 15.10:
libssh-4 0.6.3-3ubuntu3.2
Ubuntu 14.04 LTS:
libssh-4 0.6.1-0ubuntu3.3
Ubuntu 12.04 LTS:
libssh-4 0.5.2-1ubuntu0.12.04.6
In general, a standard system update will make all the necessary changes.
References:
<a class="moz-txt-link-freetext" href="http://www.ubuntu.com/usn/usn-2912-1">http://www.ubuntu.com/usn/usn-2912-1</a>
CVE-2015-3146, CVE-2016-0739
Package Information:
<a class="moz-txt-link-freetext" href="https://launchpad.net/ubuntu/+source/libssh/0.6.3-3ubuntu3.2">https://launchpad.net/ubuntu/+source/libssh/0.6.3-3ubuntu3.2</a>
<a class="moz-txt-link-freetext" href="https://launchpad.net/ubuntu/+source/libssh/0.6.1-0ubuntu3.3">https://launchpad.net/ubuntu/+source/libssh/0.6.1-0ubuntu3.3</a>
<a class="moz-txt-link-freetext" href="https://launchpad.net/ubuntu/+source/libssh/0.5.2-1ubuntu0.12.04.6">https://launchpad.net/ubuntu/+source/libssh/0.5.2-1ubuntu0.12.04.6</a>
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