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TITLE:
pam_krb5 Password Prompt User Enumeration Security Issue

SECUNIA ADVISORY ID:
SA35230

VERIFY ADVISORY:
http://secunia.com/advisories/35230/

DESCRIPTION:
A security issue has been reported in pam_krb5, which can be
exploited by malicious people to disclose potentially sensitive
information.

The security issue is caused due to pam_krb5 returning different
password prompts depending on whether or not a valid user name is
supplied, which can be exploited to enumerate valid user names.

The security issue is reported in versions 2.2.14 and later.

SOLUTION:
Restrict access to the pam_krb5 password prompt.

PROVIDED AND/OR DISCOVERED BY:
Reported in a Red Hat bug report.

ORIGINAL ADVISORY:
https://bugzilla.redhat.com/show_bug.cgi?id=502602

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