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