1 User-Visible krb5-strength Changes
3 krb5-strength 3.2 (unreleased)
5 Support building without CrackLib support by passing
6 --without-cracklib to configure. This makes the code a bit simpler
7 and lighter if you don't intend to ever use the CrackLib support.
9 krb5-strength 3.1 (2016-12-25)
11 A new configuration option, cracklib_maxlen, can be set to skip
12 CrackLib checks of passwords longer than that length. The CrackLib
13 rules were designed in a world in which most passwords were four to
14 eight characters long and tend to spuriously reject longer passwords.
15 SQLite dictionaries work better for checking longer passwords and
16 passphrases. Patch from Jorj Bauer.
18 The require_classes configuration option can now require a particular
19 number of character classes in the password (whatever those classes
20 are). Patch from Toby Blake.
22 Change the error messages returned for passwords that fail strength
23 checking to start with a capital letter. This appears to be more
24 consistent with the error message conventions used inside Heimdal.
26 Change the DB_File::Lock calling method in heimdal-history to work
27 properly with the (buggy) CPAN version of DB_File::Lock, instead of
28 relying on Debian's patched version. Thanks to Bernt Jernberg for the
31 Apply the SuSE patch for a buffer overflow when using duplicate rules
32 to the embedded CrackLib. No duplicating rules are used in the rule
33 set included with this package, and this package doesn't expose the
34 general API, so this was not exploitable, but best to close the latent
35 issue. (The other recent CrackLib vulnerability, CVE-2016-6318,
36 doesn't apply since all the GECOS manipulation code was removed from
37 the embedded CrackLib in this package.)
39 Patch the mkdict and packer in the embedded copy of CrackLib to force
40 C locale when sorting (avoiding a corrupted dictionary) and warn and
41 skip out-of-order words rather than creating a corrupted dictionary.
42 Patch from Mark Sirota.
44 Configuration instrutions are now in the heimdal-history and
45 heimdal-strength man pages and a new krb5-strength man page (which
46 documents configuration of the KDC plugin) instead of the README file
47 to make it more accessible after the software has been installed.
49 Update to rra-c-util 6.2:
51 * Use calloc in preference to malloc wherever appropriate.
52 * Use reallocarray in preference to realloc wherever appropriate.
53 * Suppress warnings from Kerberos headers under make warnings.
54 * Support the embedded Kerberos in Solaris 10 in library probes.
55 * Add missing va_end in xasprintf implementation.
56 * Fix logic in Test::RRA::Automake for new Automake dist checking.
57 * Fix all return-value checks for snprintf to avoid off-by-one error.
58 * Update warning flags for make warnings to GCC 6.1.0.
59 * Fix Test::RRA::Config for new "do" semantics in Perl 5.22.2.
60 * Add a new test for obsolete eyrie.org URLs.
61 * Require Test::Strict 0.25 or newer for Perl strictness checks.
63 Update to C TAP Harness 4.1:
65 * Replace all remaining uses of sprintf.
66 * Test lists may now have comments and blank lines.
67 * runtests -v will show the complete output from a test.
68 * Fix segfault in runtests when given an empty test list.
69 * Tests use C_TAP_SOURCE and C_TAP_BUILD instead of SOURCE and BUILD.
71 krb5-strength 3.0 (2014-03-25)
73 The krb5-strength plugin and heimdal-strength program now support a
74 SQLite password dictionary. This format of dictionary can detect any
75 password within edit distance one of a dictionary word, meaning that
76 the dictionary word can be formed by adding, removing, or changing a
77 single character in the password. A SQLite password dictionary can be
78 used alone or in combination with any of the other supported
79 dictionary types. SQLite dictionary support is based on work by David
82 cdbmake-wordlist has been renamed to krb5-strength-wordlist.
83 Generating CDB dictionaries now requires the -c option; see the
84 documentation for more information. A SQLite database of dictionary
85 words can now be created instead, using the -s option.
87 A password history implementation for Heimdal is now included. This
88 is a separate Perl program, heimdal-history, that stacks with the
89 external program implementation of strength checking. It is not
90 available in the form of a plugin, only as a Heimdal external password
91 quality check. (MIT Kerberos provides its own password history
92 mechanism.) This program has more extensive Perl module dependencies
93 than the other programs in this distribution.
95 A new configuration option, minimum_different, can be set to require
96 that passwords contain at least that many unique characters. This can
97 be used to reject long strings of identical characters or short
98 patterns, which may pass other checks but still be too easy to guess.
100 Update to rra-c-util 5.4:
102 * Fix portable/krb5.h build with a C++ compiler.
103 * Use Lancaster Consensus environment variables to control tests.
104 * Work around perltidy bug that leaves behind stray log files.
106 Update to C TAP Harness 3.0:
108 * Reopen standard input to /dev/null when running a test list.
109 * Don't leak extraneous file descriptors to tests.
111 krb5-strength 2.2 (2013-12-16)
113 More complex character class requirements can be specified with the
114 configuration option require_classes. This option lists the character
115 classes the password must contain. These restrictions may be
116 qualified with password length ranges, allowing the requirements to
117 change with the length of the password. See README for more details
118 and the option syntax.
120 cdbmake-wordlist now supports filtering out words based on maximum
121 length (-L) and arbitrary user-provided regular expressions (-x). It
122 also supports running in filter mode to produce a new wordlist instead
125 Close a file descriptor and memory leak in the included version of
126 CrackLib. This problem was already fixed in CrackLib 2.9.0.
128 Update to rra-c-util 4.12:
130 * Properly check the return status of snprintf and friends.
132 Update to C TAP Harness 2.3:
134 * Suppress lazy plans and test summaries if the test failed with bail.
135 * Add warn_unused_result gcc attributes to relevant functions.
137 krb5-strength 2.1 (2013-10-10)
139 Fix the package build when CDB support is disabled or TinyCDB was not
142 Some of the password rejection error messages have been changed to
143 make them more accurate or comprehensible to the user.
145 Passing --with-tinycdb to configure now correctly makes TinyCDB
146 support mandatory without adding bogus directories to the library and
147 include search paths.
149 krb5-strength 2.0 (2013-10-07)
151 Add support for the MIT Kerberos password quality plugin interface,
152 available in MIT Kerberos 1.9 and later, contributed by Greg Hudson
153 and MIT. Drop the patch for MIT Kerberos 1.4 (and hence support for
154 versions of MIT Kerberos prior to 1.9). A dictionary path set in
155 krb5.conf takes precedence over the dictionary path provided by MIT
156 Kerberos when the plugin is initialized, if both are set, to allow the
157 dict_path configuration setting to be used for other plugins while
158 using a separate dictionary for krb5-strength.
160 The default installation path for this plugin is now
161 /usr/local/lib/krb5/plugins/pwqual/strength.so (for both MIT and
162 Heimdal), assuming a --libdir setting of /usr/local/lib. This may
163 require updates to the Kerberos KDC configuration or moving the plugin
164 when upgrading from earlier versions.
166 Add support for building with TinyCDB and then checking passwords
167 against a CDB database. There is a new password_dictionary_cdb
168 krb5.conf configuration setting that configures a CDB directory to
169 use. The tests with a CDB dictionary are much simpler: passwords are
170 rejected if found in the dictionary either literally, with one or two
171 characters removed from the start or end, or with one character
172 removed from both the start and the end. Both a CrackLib and a CDB
173 dictionary can be specified to check both dictionaries. A new
174 cdbmake-wordlist utility (written in Perl) is included to ease the
175 process of creating a CDB database from a simple word list.
177 A minimum password length can now be enforced directly via the plugin
178 or external check program without relying on CrackLib. To set a
179 minimum password length, add a minimum_length setting to the
180 krb5-strength section of [appdefaults] in krb5.conf.
182 New boolean settings require_ascii_printable and require_non_letter
183 are supported in the krb5-strength setting of [appdefaults] in
184 krb5.conf. The former rejects passwords containing characters other
185 than printable ASCII characters (including space), and the latter
186 requires that passwords contain at least one character that is not a
187 letter (upper or lower case) or a space.
189 The plugin can now be configured without a dictionary, in which case
190 only checks for a password based on the principal and the simpler
191 checks available through the new configuration variables are done.
192 This mode is mostly useful for testing, since such simple checking can
193 more easily be done via less complex password strength configurations.
195 The check for passwords based on the principal now check for passwords
196 formed by reversing or adding numbers before and after each separate
197 component of the principal. This will catch passwords based on the
198 realm or components of the realm, which will often catch passwords
199 based on the name of the local institution.
201 The plugin now sets the Kerberos error message in the context to pass
202 error information, resulting in higher-quality error reporting in the
205 CrackLib checks for passwords where a character is a simple increment
206 or decrement of the previous character. In previous versions, the
207 embedded version of CrackLib allowed at most four such occurrences in
208 the entire password. This results in false positives on long
209 passphrases, since such accidental letter relationships aren't
210 uncommon in human languages. Change the embedded CrackLib to allow
211 one such simple increment for every three characters in the password,
212 which tightens the check somewhat for shorter passwords and loosens it
213 considerably for longer passwords.
215 Expect the Heimdal password strength checking plugin header in
216 kadm5/kadm5-pwcheck.h instead of outside of the kadm5 directory. This
217 is the path used by current versions of Heimdal. Drop support for
218 older versions of Heimdal that don't install this header file.
220 Update to rra-c-util 4.9:
222 * Probe for Kerberos headers using file checks instead of compiles.
223 * Improve probe for the Heimdal libroken library.
224 * Always build with large file support.
225 * Conditionally call AM_PROG_AR for portability to new Autotools.
227 Update to C TAP Harness 2.2:
229 * Allow more easily running single programs under tests/runtests.
230 * Flush the output from the test harness after each test.
232 krb5-strength 1.1 (2012-05-11)
234 Change the minimum password length in the embedded CrackLib to 8.
236 Reject passwords formed from the username portion of the principal
237 with digits appended.
239 In the embedded CrackLib, also check for a duplicated dictionary word.
241 Support linking with the system CrackLib instead of the embedded and
242 stricter copy by passing --with-cracklib to configure.
244 Fix variable sizes in the embedded CrackLib on 64-bit platforms. This
245 may fix interoperability problems with databases created on platforms
246 with a different native integer size. Thanks, Karl Lehnberger and
249 Stop using local in the test suite for portability to Solaris /bin/sh.
251 Update to rra-c-util 4.4:
253 * Use PATH_KRB5_CONFIG to override krb5-config location.
254 * Fix probing for ibm_svc/krb5_svc.h on AIX.
255 * Support Heimdal libraries without libroken, like OpenBSD.
256 * Fix manual Kerberos library probing without transitive dependencies.
257 * Support systems that only have krb5/krb5.h.
258 * Pass --deps to krb5-config in the non-reduced-dependencies case.
259 * Silence __attribute__ warnings on more compilers.
260 * Update warning flags for make warnings.
261 * Flesh out MAINTCLEANFILES to remove autogen results.
262 * Add notices to all files copied from rra-c-util.
264 Update to C TAP Harness 1.12:
266 * Drop is_double from the C TAP library to avoid requiring -lm.
267 * Avoid using local in the shell libtap.sh library.
268 * Silence __attribute__ warnings on more compilers.
269 * runtests now frees all allocated resources on exit.
270 * Fix runtests to still honor SOURCE and -s without BUILD and -b.
271 * Add tests/HOWTO documenting how to add new tests.
272 * Ensure correct output ordering in test results.
273 * Add -h and a better usage message to tests/runtests.
275 krb5-strength 1.0 (2010-02-16)
277 Add heimdal-strength, a program that checks password strength using
278 the protocol for a Heimdal external check program.
280 The shared module now also exports the interface expected by Heimdal's
281 dynamically loaded password strength checking API and can be used as a
282 Heimdal kadmin plugin.
284 Add a new plugin API for MIT Kerberos modelled after the plugin API
285 used for other MIT Kerberos plugins. Thanks to Marcus Watts for
286 substantial research and contributions to the interface design. This
287 work is incomplete in this release, missing the corresponding patch to
290 Fixed the data format written by the included packer program to add
291 enough nul bytes at the end of the data. Previously, there was not
292 enough trailing nul bytes for the expected input format, leading to
293 uninitialized memory reads in the password lookup.
295 Add a test suite using the driver and library from C TAP Harness 1.1.
297 Add portability code for platforms without a working snprintf or other
298 deficiencies and updated the code to take advantage of those
301 krb5-strength 0.5 (2007-07-18)
303 The check of the password against the principal checked against the
304 fully-qualified principal, which is not the usual problem.
305 Additionally check that the password doesn't match the principal with
306 the realm removed or the reverse of that (case-insensitive).
308 krb5-strength 0.4 (2007-03-28)
310 The patches directory was omitted from the distribution. Really
313 krb5-strength 0.3 (2007-03-23)
315 Initial public release. Includes a patch for MIT Kerberos, a slightly
316 modified version of CrackLib, and glue wrapped around CrackLib to make