Date: Mon, 07 Nov 2011 08:49:23 -0700 From: Kurt Seifried <kseifried@...hat.com> To: oss-security@...ts.openwall.com CC: Jan Lieskovsky <jlieskov@...hat.com>, "Steven M. Christey" <coley@...us.mitre.org>, Nanakos Chrysostomos <nanakos@...ed-net.gr>, Dennis Gilmore <dennis@...il.us> Subject: Re: CVE Request -- pam_yubico -- Authentication bypass via NULL password On 11/07/2011 04:15 AM, Jan Lieskovsky wrote: > Hello Kurt, Steve, vendors, > > a security flaw was found in the way pam_yubico, a pluggable > authentication module for yubikeys, performed user authentication, > when 'use_first_pass' PAM configuration option was not used and > pam_yubico module was configured as 'sufficient' in the PAM > configuration. A remote attacker could use this flaw to circumvent > common authentication process and obtain access to the account in > question by providing a NULL value (pressing Ctrl-D keyboard > sequence) as the password string. > > Relevant upstream patch: >  > https://github.com/Yubico/yubico-pam/commit/4712da70cac159d5ca9579c1e4fac0645b674043 > > References: >  > http://groups.google.com/group/yubico-devel/browse_thread/thread/3f179ec0e6845deb >  https://bugzilla.redhat.com/show_bug.cgi?id=733322 > > Could you allocate a CVE id for this? > Please use CVE-2011-4120 for this issue. > Thank you && Regards, Jan. > -- > Jan iankko Lieskovsky / Red Hat Security Response Team -- -Kurt Seifried / Red Hat Security Response Team
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