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|
Patch for Debian bug #163787 et al
Always use the process uid, not getlogin(), to identify an applicant in
pam_wheel; utmp may be wrong or may have no entry at all in the case of
an xterm
Authors: Ben Collins <bcollins@debian.org>
Upstream status: submitted in <20070901175405.GA26092@dario.dodds.net>
Index: pam.deb/modules/pam_wheel/pam_wheel.c
===================================================================
--- pam.deb.orig/modules/pam_wheel/pam_wheel.c
+++ pam.deb/modules/pam_wheel/pam_wheel.c
@@ -60,9 +60,8 @@
/* argument parsing */
#define PAM_DEBUG_ARG 0x0001
-#define PAM_USE_UID_ARG 0x0002
-#define PAM_TRUST_ARG 0x0004
-#define PAM_DENY_ARG 0x0010
+#define PAM_TRUST_ARG 0x0002
+#define PAM_DENY_ARG 0x0004
#define PAM_ROOT_ONLY_ARG 0x0020
static int
@@ -80,8 +79,7 @@
if (!strcmp(*argv,"debug"))
ctrl |= PAM_DEBUG_ARG;
- else if (!strcmp(*argv,"use_uid"))
- ctrl |= PAM_USE_UID_ARG;
+ else if (!strcmp(*argv,"use_uid")); /* ignored for compat. */
else if (!strcmp(*argv,"trust"))
ctrl |= PAM_TRUST_ARG;
else if (!strcmp(*argv,"deny"))
@@ -129,27 +127,14 @@
}
}
- if (ctrl & PAM_USE_UID_ARG) {
- tpwd = pam_modutil_getpwuid (pamh, getuid());
- if (!tpwd) {
- if (ctrl & PAM_DEBUG_ARG) {
- pam_syslog(pamh, LOG_NOTICE, "who is running me ?!");
- }
- return PAM_SERVICE_ERR;
- }
- fromsu = tpwd->pw_name;
- } else {
- fromsu = pam_modutil_getlogin(pamh);
- if (fromsu) {
- tpwd = pam_modutil_getpwnam (pamh, fromsu);
- }
- if (!fromsu || !tpwd) {
- if (ctrl & PAM_DEBUG_ARG) {
- pam_syslog(pamh, LOG_NOTICE, "who is running me ?!");
- }
- return PAM_SERVICE_ERR;
+ tpwd = pam_modutil_getpwuid (pamh, getuid());
+ if (!tpwd) {
+ if (ctrl & PAM_DEBUG_ARG) {
+ pam_syslog(pamh, LOG_NOTICE, "who is running me ?!");
}
+ return PAM_SERVICE_ERR;
}
+ fromsu = tpwd->pw_name;
/*
* At this point fromsu = username-of-invoker; tpwd = pwd ptr for fromsu
Index: pam.deb/modules/pam_wheel/pam_wheel.8.xml
===================================================================
--- pam.deb.orig/modules/pam_wheel/pam_wheel.8.xml
+++ pam.deb/modules/pam_wheel/pam_wheel.8.xml
@@ -33,9 +33,6 @@
<arg choice="opt">
trust
</arg>
- <arg choice="opt">
- use_uid
- </arg>
</cmdsynopsis>
</refsynopsisdiv>
@@ -115,18 +112,6 @@
</para>
</listitem>
</varlistentry>
- <varlistentry>
- <term>
- <option>use_uid</option>
- </term>
- <listitem>
- <para>
- The check for wheel membership will be done against
- the current uid instead of the original one (useful when
- jumping with su from one account to another for example).
- </para>
- </listitem>
- </varlistentry>
</variablelist>
</refsect1>
Index: pam.deb/modules/pam_wheel/pam_wheel.8
===================================================================
--- pam.deb.orig/modules/pam_wheel/pam_wheel.8
+++ pam.deb/modules/pam_wheel/pam_wheel.8
@@ -1,64 +1,59 @@
.\" Title: pam_wheel
.\" Author:
-.\" Generator: DocBook XSL Stylesheets v1.73.1 <http://docbook.sf.net/>
-.\" Date: 04/16/2008
+.\" Generator: DocBook XSL Stylesheets v1.73.2 <http://docbook.sf.net/>
+.\" Date: 07/27/2008
.\" Manual: Linux-PAM Manual
.\" Source: Linux-PAM Manual
.\"
-.TH "PAM_WHEEL" "8" "04/16/2008" "Linux-PAM Manual" "Linux\-PAM Manual"
+.TH "PAM_WHEEL" "8" "07/27/2008" "Linux-PAM Manual" "Linux\-PAM Manual"
.\" disable hyphenation
.nh
.\" disable justification (adjust text to left margin only)
.ad l
.SH "NAME"
-pam_wheel - Only permit root access to members of group wheel
+pam_wheel \- Only permit root access to members of group wheel
.SH "SYNOPSIS"
.HP 13
-\fBpam_wheel\.so\fR [debug] [deny] [group=\fIname\fR] [root_only] [trust] [use_uid]
+\fBpam_wheel\&.so\fR [debug] [deny] [group=\fIname\fR] [root_only] [trust]
.SH "DESCRIPTION"
.PP
The pam_wheel PAM module is used to enforce the so\-called
\fIwheel\fR
-group\. By default it permits root access to the system if the applicant user is a member of the
+group\&. By default it permits root access to the system if the applicant user is a member of the
\fIwheel\fR
-group\. If no group with this name exist, the module is using the group with the group\-ID
-\fB0\fR\.
+group\&. If no group with this name exist, the module is using the group with the group\-ID
+\fB0\fR\&.
.SH "OPTIONS"
.PP
\fBdebug\fR
.RS 4
-Print debug information\.
+Print debug information\&.
.RE
.PP
\fBdeny\fR
.RS 4
Reverse the sense of the auth operation: if the user is trying to get UID 0 access and is a member of the wheel group (or the group of the
\fBgroup\fR
-option), deny access\. Conversely, if the user is not in the group, return PAM_IGNORE (unless
+option), deny access\&. Conversely, if the user is not in the group, return PAM_IGNORE (unless
\fBtrust\fR
-was also specified, in which case we return PAM_SUCCESS)\.
+was also specified, in which case we return PAM_SUCCESS)\&.
.RE
.PP
\fBgroup=\fR\fB\fIname\fR\fR
.RS 4
Instead of checking the wheel or GID 0 groups, use the
\fB\fIname\fR\fR
-group to perform the authentication\.
+group to perform the authentication\&.
.RE
.PP
\fBroot_only\fR
.RS 4
-The check for wheel membership is done only\.
+The check for wheel membership is done only\&.
.RE
.PP
\fBtrust\fR
.RS 4
-The pam_wheel module will return PAM_SUCCESS instead of PAM_IGNORE if the user is a member of the wheel group (thus with a little play stacking the modules the wheel members may be able to su to root without being prompted for a passwd)\.
-.RE
-.PP
-\fBuse_uid\fR
-.RS 4
-The check for wheel membership will be done against the current uid instead of the original one (useful when jumping with su from one account to another for example)\.
+The pam_wheel module will return PAM_SUCCESS instead of PAM_IGNORE if the user is a member of the wheel group (thus with a little play stacking the modules the wheel members may be able to su to root without being prompted for a passwd)\&.
.RE
.SH "MODULE SERVICES PROVIDED"
.PP
@@ -66,52 +61,52 @@
\fBauth\fR
and
\fBaccount\fR
-services are supported\.
+services are supported\&.
.SH "RETURN VALUES"
.PP
PAM_AUTH_ERR
.RS 4
-Authentication failure\.
+Authentication failure\&.
.RE
.PP
PAM_BUF_ERR
.RS 4
-Memory buffer error\.
+Memory buffer error\&.
.RE
.PP
PAM_IGNORE
.RS 4
-The return value should be ignored by PAM dispatch\.
+The return value should be ignored by PAM dispatch\&.
.RE
.PP
PAM_PERM_DENY
.RS 4
-Permission denied\.
+Permission denied\&.
.RE
.PP
PAM_SERVICE_ERR
.RS 4
-Cannot determine the user name\.
+Cannot determine the user name\&.
.RE
.PP
PAM_SUCCESS
.RS 4
-Success\.
+Success\&.
.RE
.PP
PAM_USER_UNKNOWN
.RS 4
-User not known\.
+User not known\&.
.RE
.SH "EXAMPLES"
.PP
-The root account gains access by default (rootok), only wheel members can become root (wheel) but Unix authenticate non\-root applicants\.
+The root account gains access by default (rootok), only wheel members can become root (wheel) but Unix authenticate non\-root applicants\&.
.sp
.RS 4
.nf
-su auth sufficient pam_rootok\.so
-su auth required pam_wheel\.so
-su auth required pam_unix\.so
+su auth sufficient pam_rootok\&.so
+su auth required pam_wheel\&.so
+su auth required pam_unix\&.so
.fi
.RE
@@ -124,4 +119,4 @@
\fBpam\fR(8)
.SH "AUTHOR"
.PP
-pam_wheel was written by Cristian Gafton <gafton@redhat\.com>\.
+pam_wheel was written by Cristian Gafton <gafton@redhat\&.com>\&.
Index: pam.deb/modules/pam_wheel/README
===================================================================
--- pam.deb.orig/modules/pam_wheel/README
+++ pam.deb/modules/pam_wheel/README
@@ -39,12 +39,6 @@
modules the wheel members may be able to su to root without being prompted
for a passwd).
-use_uid
-
- The check for wheel membership will be done against the current uid instead
- of the original one (useful when jumping with su from one account to
- another for example).
-
EXAMPLES
The root account gains access by default (rootok), only wheel members can
|
