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WebAuth 4.6.1 Announcement

The WebAuth team is pleased to announce Stanford WebAuth 4.6.1. This is primarily a bug-fix release, with one Stanford-specific fix for mod_webauth, a build system fix, and various minor bug fixes for the WebLogin and WebKDC components. It also adds FAST support for the WebKDC.

For documentation and downloads of WebAuth 4.6.1, see:


The user-visible changes in this release are:

  • Support for AuthType StanfordAuth (for backward compatibility with WebAuth 2.5) was broken in WebAuth 4.6.0, causing mod_webauth to reject all accesses to resources protected with that AuthType. This has been fixed in this release.

  • Add a new configuration directive, WebKdcFastArmorCache, for mod_webkdc. If set, this specifies the path to a Kerberos ticket cache that can (and must) be used for FAST (Flexible Authentication Secure Tunneling) protection of Kerberos password authentications. The Kerberos KDC must also support FAST in order to safely enable this option. Based on a patch by Jakob Uhd Jepsen ( A/S).

  • Fix parsing of the WebKdcKerberosFactors configuration directive.

  • Add a new webauth_krb5_set_fast_armor_path interface to libwebauth that allows configuring a path to a FAST armor ticket cache before authenticating with a password.

  • Show the expiring password warning in WebLogin if the browser request was a POST. Previously, it was skipped if the user had a REMOTE_USER preference or if the browser presented a single sign-on cookie. This was too conservative, not warning in cases when REMOTE_USER failed, when the browser presented an expired single sign-on cookie (systems that are suspended rather than shut down, for example), and when the user has to do multifactor authentication. Checking for a POST is a closer match for when we can force a confirmation screen without too much user disruption.

  • When translating Kerberos errors, treat KRB5_KDC_UNREACH (cannot contact any KDC for realm) as a user rejected error instead of a Kerberos error. This avoids returning an internal error from WebLogin and instead tells the user the username is invalid. This is not always correct, since the unreachable KDC could be the local KDC, but it's better than the previous behavior of throwing internal errors when users enter email addresses as their username.

  • Translate an EINVAL error from the Kerberos libraries during password authentication to an incorrect password error code. Older versions of MIT Kerberos returned EINVAL for excessively long passwords.

  • In WebLogin, verify that the username form field was sent before attempting to do multifactor operations and return an error if it isn't, avoiding undefined variable warnings and other errors deeper in the WebLogin code.

  • Allow newlines, carriage returns, and tabs in the XML sent from the WebKDC to the WebLogin server rather than replacing them with periods. This fixes the display of <user-message> elements that contain newlines.

  • If a user may switch to a different authorization identity, force display of the confirmation page in WebLogin even if this is normally disabled. Otherwise, there is no opportunity for the user to change identities.

  • Diagnose empty RT or ST parameters to WebLogin and return the same error as when those parameters are missing entirely.

  • Fix compilation when remctl support is not enabled.

  • Add new factors mp (mobile push) and v (voice), which count as separate classes for determining multifactor. This means the combination of those factors with any other factor class will result in a synthensized multifactor factor.

  • Warn in the mod_webauth documentation that, when using credential delegation to a load-balanced pool, all members of that pool must have the same Kerberos identity.

  • Update to rra-c-util 5.5:

    • Use Lancaster Consensus environment variables to control tests.
    • Use calloc or reallocarray for protection against integer overflows.
    • Suppress warnings from Kerberos headers in non-system paths.
    • Update warning flags when building with make warnings.
    • Only pass warning suppression flags to Perl under make warnings.
  • Update to C TAP Harness 3.1:

    • Check for integer overflow on memory allocations.
    • Avoid all remaining uses of sprintf.
Last modified Friday, 12-Dec-2014 02:31:13 PM

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