Kerberos 5 Preauthentication Bypass Vulnerability

CVE-2015-2694 · MEDIUM Severity

AV:N/AC:M/AU:N/C:P/I:P/A:N

The kdcpreauth modules in MIT Kerberos 5 (aka krb5) 1.12.x and 1.13.x before 1.13.2 do not properly track whether a client's request has been validated, which allows remote attackers to bypass an intended preauthentication requirement by providing (1) zero bytes of data or (2) an arbitrary realm name, related to plugins/preauth/otp/main.c and plugins/preauth/pkinit/pkinit_srv.c.

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