blob: fa0d13a483dad75a4beabe414a157f7e87f27323 [file] [log] [blame]
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="200512-17">
<title>scponly: Multiple privilege escalation issues</title>
<synopsis>
Local users can exploit an scponly flaw to gain root privileges, and
scponly restricted users can use another vulnerability to evade shell
restrictions.
</synopsis>
<product type="ebuild">scponly</product>
<announced>December 29, 2005</announced>
<revised>May 22, 2006: 02</revised>
<bug>116526</bug>
<access>local and remote</access>
<affected>
<package name="net-misc/scponly" auto="yes" arch="*">
<unaffected range="ge">4.2</unaffected>
<vulnerable range="lt">4.2</vulnerable>
</package>
</affected>
<background>
<p>
scponly is a restricted shell, allowing only a few predefined commands.
It is often used as a complement to OpenSSH to provide access to remote
users without providing any remote execution privileges.
</p>
</background>
<description>
<p>
Max Vozeler discovered that the scponlyc command allows users to chroot
into arbitrary directories. Furthermore, Pekka Pessi reported that
scponly insufficiently validates command-line parameters to a scp or
rsync command.
</p>
</description>
<impact type="high">
<p>
A local attacker could gain root privileges by chrooting into arbitrary
directories containing hardlinks to setuid programs. A remote scponly
user could also send malicious parameters to a scp or rsync command
that would allow to escape the shell restrictions and execute arbitrary
programs.
</p>
</impact>
<workaround>
<p>
There is no known workaround at this time.
</p>
</workaround>
<resolution>
<p>
All scponly users should upgrade to the latest version:
</p>
<code>
# emerge --sync
# emerge --ask --oneshot --verbose &quot;&gt;=net-misc/scponly-4.2&quot;</code>
</resolution>
<references>
<uri link="http://sublimation.org/scponly/index.html#relnotes">scponly release notes</uri>
<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-4532">CVE-2005-4532</uri>
<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-4533">CVE-2005-4533</uri>
</references>
<metadata tag="submitter" timestamp="Tue, 27 Dec 2005 09:38:39 +0000">
koon
</metadata>
<metadata tag="bugReady" timestamp="Thu, 29 Dec 2005 10:10:38 +0000">
koon
</metadata>
</glsa>