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libpam: Fix for CVE-2010-4708 

Change default for user_readenv to 0 and document the
new default for user_readenv.

This fix from:
http://pam.cvs.sourceforge.net/viewvc/pam/Linux-PAM/modules/pam_env
/pam_env.c?r1=1.22&r2=1.23&view=patch
http://pam.cvs.sourceforge.net/viewvc/pam/Linux-PAM/modules/pam_env
/pam_env.8.xml?r1=1.7&r2=1.8&view=patch

(From OE-Core rev: 871ae7a6453b3b66610fd8bbaa770c92be850e19)

Signed-off-by: Wenzong Fan <wenzong.fan@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Wenzong Fan 2013-06-18 23:21:29 -04:00 committed by Richard Purdie
parent 3a06eb6f53
commit cc53a1af6f
2 changed files with 42 additions and 0 deletions
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41
meta/recipes-extended/pam/libpam/libpam-fix-for-CVE-2010-4708.patch Normal file
View File

@ -0,0 +1,41 @@
Upstream-Status: Backport
Fix for CVE-2010-4708
Change default for user_readenv to 0 and document the
new default for user_readenv.
This fix is got from:
http://pam.cvs.sourceforge.net/viewvc/pam/Linux-PAM/modules/pam_env
/pam_env.c?r1=1.22&r2=1.23&view=patch
http://pam.cvs.sourceforge.net/viewvc/pam/Linux-PAM/modules/pam_env
/pam_env.8.xml?r1=1.7&r2=1.8&view=patch
Signed-off-by: Wenzong Fan <wenzong.fan@windriver.com>
---
--- a/modules/pam_env/pam_env.c 2012-09-05 13:57:47.000000000 +0800
+++ b/modules/pam_env/pam_env.c 2012-09-05 13:58:05.000000000 +0800
@@ -10,7 +10,7 @@
#define DEFAULT_READ_ENVFILE 1
#define DEFAULT_USER_ENVFILE ".pam_environment"
-#define DEFAULT_USER_READ_ENVFILE 1
+#define DEFAULT_USER_READ_ENVFILE 0
#include "config.h"
--- a/modules/pam_env/pam_env.8.xml 2012-09-05 13:58:24.000000000 +0800
+++ b/modules/pam_env/pam_env.8.xml 2012-09-05 13:59:36.000000000 +0800
@@ -147,7 +147,10 @@
<listitem>
<para>
Turns on or off the reading of the user specific environment
- file. 0 is off, 1 is on. By default this option is on.
+ file. 0 is off, 1 is on. By default this option is off as user
+ supplied environment variables in the PAM environment could affect
+ behavior of subsequent modules in the stack without the consent
+ of the system administrator.
</para>
</listitem>
</varlistentry>

1
meta/recipes-extended/pam/libpam_1.1.6.bb
View File

@ -22,6 +22,7 @@ SRC_URI = "http://linux-pam.org/library/Linux-PAM-${PV}.tar.bz2 \
file://fixsepbuild.patch \
file://reflect-the-enforce_for_root-semantics-change-in-pam.patch \
file://add-checks-for-crypt-returning-NULL.patch \
file://libpam-fix-for-CVE-2010-4708.patch \
"
SRC_URI[md5sum] = "7b73e58b7ce79ffa321d408de06db2c4"
SRC_URI[sha256sum] = "bab887d6280f47fc3963df3b95735a27a16f0f663636163ddf3acab5f1149fc2"