low
2.1
CWE
200
Advisory Published
CVE Published
Updated

CVE-2011-4327: Infoleak

First published: Mon Nov 21 2011(Updated: )

A security flaw was found in the way ssh-keysign, a ssh helper program for host based authentication, attempted to retrieve enough entropy information on configurations that lacked a built-in entropy pool in OpenSSL (a ssh-rand-helper program would be executed to retrieve the entropy from the system environment). A local attacker could use this flaw to obtain unauthorized access to host keys via ptrace(2) process trace attached to the 'ssh-rand-helper' program. References: [1] <a href="http://www.openssh.com/txt/release-5.8p2">http://www.openssh.com/txt/release-5.8p2</a> [2] <a href="http://www.openssh.com/txt/portable-keysign-rand-helper.adv">http://www.openssh.com/txt/portable-keysign-rand-helper.adv</a> [3] <a href="http://www.nessus.org/plugins/index.php?view=single&amp;id=53841">http://www.nessus.org/plugins/index.php?view=single&amp;id=53841</a> [4] <a href="http://www.openwall.com/lists/oss-security/2011/11/21/11">http://www.openwall.com/lists/oss-security/2011/11/21/11</a> (CVE assignment)

Credit: secalert@redhat.com

Affected SoftwareAffected VersionHow to fix
Openbsd Openssh=5.4
Openbsd Openssh=2
Openbsd Openssh=3.8
Openbsd Openssh=3.8.1p1
Openbsd Openssh=4.3p2
Openbsd Openssh=3.2.2
Openbsd Openssh=3.1
Openbsd Openssh=5.5
Openbsd Openssh=3.0.2p1
Openbsd Openssh=1.5.8
Openbsd Openssh=5.3
Openbsd Openssh=4.1
Openbsd Openssh=3.8.1
Openbsd Openssh=2.1.1
Openbsd Openssh=3.7.1p2
Openbsd Openssh=4.8
Openbsd Openssh=4.9
Openbsd Openssh=3.2.3p1
Openbsd Openssh=3.1p1
Openbsd Openssh=2.5.1
Openbsd Openssh=2.9.9p2
Openbsd Openssh=3.6.1p2
Openbsd Openssh=3.9
Openbsd Openssh=3.0
Openbsd Openssh=1.2.1
Openbsd Openssh=2.2
Openbsd Openssh=3.2
Openbsd Openssh=3.6
Openbsd Openssh=4.7
Openbsd Openssh=1.5.7
Openbsd Openssh=1.2.3
Openbsd Openssh=3.7
Openbsd Openssh<=5.8
Openbsd Openssh=4.0p1
Openbsd Openssh=3.5p1
Openbsd Openssh=2.3.1
Openbsd Openssh=3.0.1p1
Openbsd Openssh=4.4
Openbsd Openssh=3.7.1p1
Openbsd Openssh=2.1
Openbsd Openssh=1.2
Openbsd Openssh=5.2
Openbsd Openssh=3.3
Openbsd Openssh=3.2.2p1
Openbsd Openssh=3.9.1p1
Openbsd Openssh=3.0.2
Openbsd Openssh=3.4p1
Openbsd Openssh=3.6.1p1
Openbsd Openssh=3.0.1
Openbsd Openssh=2.9.9
Openbsd Openssh=3.6.1
Openbsd Openssh=4.1p1
Openbsd Openssh=5.7
Openbsd Openssh=1.2.2
Openbsd Openssh=4.2p1
Openbsd Openssh=4.5
Openbsd Openssh=2.9p1
Openbsd Openssh=2.9
Openbsd Openssh=3.7.1
Openbsd Openssh=1.2.27
Openbsd Openssh=4.2
Openbsd Openssh=2.5.2
Openbsd Openssh=2.3
Openbsd Openssh=3.4
Openbsd Openssh=4.4p1
Openbsd Openssh=4.3p1
Openbsd Openssh=3.5
Openbsd Openssh=2.5
Openbsd Openssh=5.1
Openbsd Openssh=3.0p1
Openbsd Openssh=3.3p1
Openbsd Openssh=5.6
Openbsd Openssh=4.3
Openbsd Openssh=4.0
Openbsd Openssh=3.9.1
Openbsd Openssh=5.0
Openbsd Openssh=1.3
Openbsd Openssh=2.9p2
Openbsd Openssh=1.5
Openbsd Openssh=4.6

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