krb5-1.8.4 is released
tlyu at MIT.EDU
Tue May 24 19:34:29 EDT 2011
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The MIT Kerberos Team announces the availability of MIT Kerberos 5
Release 1.8.4. Please see below for a list of some major changes
included, or consult the README file in the source tree for a more
detailed list of significant changes.
Note that there is a GSS-API behavior change introduced by this
release: see below for additional information.
RETRIEVING KERBEROS 5 RELEASE 1.8.4
You may retrieve the Kerberos 5 Release 1.8.4 source from the
The homepage for the krb5-1.8.4 release is:
Further information about Kerberos 5 may be found at the following
and at the MIT Kerberos Consortium web site:
The krb5-1.8 release disables single-DES cryptosystems by default. As
a result, you may need to add the libdefaults setting
"allow_weak_crypto = true" to communicate with existing Kerberos
infrastructures if they do not support stronger ciphers.
The Data Encryption Standard (DES) is widely recognized as weak. The
krb5-1.7 release contains measures to encourage sites to migrate away
- From using single-DES cryptosystems. Among these is a configuration
variable that enables "weak" enctypes, which now defaults to "false"
beginning with krb5-1.8. The krb5-1.8 release includes additional
measures to ease the transition away from single-DES. These
additional measures include:
* enctype config enhancements (so you can do "DEFAULT +des", etc.)
* new API to allow applications (e.g. AFS) to explicitly reenable weak
* easier kadmin history key changes
Major changes in 1.8.4
This is primarily a bugfix release.
* Fix vulnerabilities:
** KDC uninitialized pointer crash [MITKRB5-SA-2010-006 CVE-2010-1322]
** kpropd denial of service [MITKRB5-SA-2011-001 CVE-2010-4022]
** KDC denial of service attacks [MITKRB5-SA-2011-002
CVE-2011-0281 CVE-2011-0282 CVE-2011-0283]
** KDC double-free when PKINIT enabled [MITKRB5-SA-2011-003
** kadmind frees invalid pointer [MITKRB5-SA-2011-004 CVE-2011-0285]
** Correctly encrypt GSSAPI forwarded credentials using the session
key, not a subkey.
** Set NT-SRV-INST on TGS principal names as expected by some
Windows Server Domain Controllers.
** Don't reject AP-REQ messages if their PAC doesn't validate;
suppress the PAC instead.
** Correctly validate HMAC-MD5 checksums that use DES keys
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