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gnu: cracklib: Fix CVE-2016-6318.

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* gnu/packages/patches/cracklib-CVE-2016-6318.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.
* gnu/packages/password-utils.scm (cracklib)[source]: Use the patch.
This commit is contained in:
Leo Famulari 2016-08-16 22:33:39 -04:00
parent 231313f76a
commit 53dcbbec07
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GPG key ID: 2646FA30BACA7F08
3 changed files with 98 additions and 0 deletions
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1
gnu/local.mk
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@ -464,6 +464,7 @@ dist_patch_DATA = \
%D%/packages/patches/cpio-gets-undeclared.patch \
%D%/packages/patches/cpio-CVE-2016-2037.patch \
%D%/packages/patches/cpufrequtils-fix-aclocal.patch \
%D%/packages/patches/cracklib-CVE-2016-6318.patch \
%D%/packages/patches/crda-optional-gcrypt.patch \
%D%/packages/patches/crossmap-allow-system-pysam.patch \
%D%/packages/patches/csound-header-ordering.patch \

2
gnu/packages/password-utils.scm
View file

@ -29,6 +29,7 @@
#:use-module (guix build-system gnu)
#:use-module (guix download)
#:use-module (guix packages)
#:use-module (gnu packages)
#:use-module (gnu packages admin)
#:use-module (gnu packages base)
#:use-module (gnu packages compression)
@ -159,6 +160,7 @@ and vice versa.")
(uri (string-append "https://github.com/cracklib/cracklib/"
"releases/download/" name "-" version "/"
name "-" version ".tar.gz"))
(patches (search-patches "cracklib-CVE-2016-6318.patch"))
(sha256
(base32
"0hrkb0prf7n92w6rxgq0ilzkk6rkhpys2cfqkrbzswp27na7dkqp"))))

95
gnu/packages/patches/cracklib-CVE-2016-6318.patch Normal file
View file

@ -0,0 +1,95 @@
Fix CVE-2016-6318.
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-6318
Patch copied from Red Hat:
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-6318
https://bugzilla.redhat.com/attachment.cgi?id=1188599&action=diff
It is not safe to pass words longer than STRINGSIZE further to cracklib
so the longbuffer cannot be longer than STRINGSIZE.
diff -up cracklib-2.9.0/lib/fascist.c.longgecos cracklib-2.9.0/lib/fascist.c
--- cracklib-2.9.0/lib/fascist.c.longgecos 2014-02-06 16:03:59.000000000 +0100
+++ cracklib-2.9.0/lib/fascist.c 2016-08-08 12:05:40.279235815 +0200
@@ -515,7 +515,7 @@ FascistGecosUser(char *password, const c
char gbuffer[STRINGSIZE];
char tbuffer[STRINGSIZE];
char *uwords[STRINGSIZE];
- char longbuffer[STRINGSIZE * 2];
+ char longbuffer[STRINGSIZE];
if (gecos == NULL)
gecos = "";
@@ -596,38 +596,47 @@ FascistGecosUser(char *password, const c
{
for (i = 0; i < j; i++)
{
- strcpy(longbuffer, uwords[i]);
- strcat(longbuffer, uwords[j]);
-
- if (GTry(longbuffer, password))
+ if (strlen(uwords[i]) + strlen(uwords[j]) < STRINGSIZE)
{
- return _("it is derived from your password entry");
- }
-
- strcpy(longbuffer, uwords[j]);
- strcat(longbuffer, uwords[i]);
+ strcpy(longbuffer, uwords[i]);
+ strcat(longbuffer, uwords[j]);
- if (GTry(longbuffer, password))
- {
- return _("it's derived from your password entry");
+ if (GTry(longbuffer, password))
+ {
+ return _("it is derived from your password entry");
+ }
+
+ strcpy(longbuffer, uwords[j]);
+ strcat(longbuffer, uwords[i]);
+
+ if (GTry(longbuffer, password))
+ {
+ return _("it's derived from your password entry");
+ }
}
- longbuffer[0] = uwords[i][0];
- longbuffer[1] = '\0';
- strcat(longbuffer, uwords[j]);
-
- if (GTry(longbuffer, password))
+ if (strlen(uwords[j]) < STRINGSIZE - 1)
{
- return _("it is derivable from your password entry");
+ longbuffer[0] = uwords[i][0];
+ longbuffer[1] = '\0';
+ strcat(longbuffer, uwords[j]);
+
+ if (GTry(longbuffer, password))
+ {
+ return _("it is derivable from your password entry");
+ }
}
- longbuffer[0] = uwords[j][0];
- longbuffer[1] = '\0';
- strcat(longbuffer, uwords[i]);
-
- if (GTry(longbuffer, password))
+ if (strlen(uwords[i]) < STRINGSIZE - 1)
{
- return _("it's derivable from your password entry");
+ longbuffer[0] = uwords[j][0];
+ longbuffer[1] = '\0';
+ strcat(longbuffer, uwords[i]);
+
+ if (GTry(longbuffer, password))
+ {
+ return _("it's derivable from your password entry");
+ }
}
}
}