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- getsubids: provide system binary and man page (#1980780)

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- pwck: fix segfault when calling fprintf() (#2021339)
- newgrp: fix segmentation fault (#2019553)
- groupdel: fix SIGSEGV when passwd does not exist (#1986111)

Signed-off-by: Iker Pedrosa <ipedrosa@redhat.com>
This commit is contained in:
Iker Pedrosa 2021-11-19 09:44:08 +01:00
parent a2d5d3dbda
commit 957f0eb09e
5 changed files with 345 additions and 2 deletions
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245
shadow-4.9-getsubids.patch Normal file
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@ -0,0 +1,245 @@
diff -up shadow-4.9/man/getsubids.1.xml.getsubids shadow-4.9/man/getsubids.1.xml
--- shadow-4.9/man/getsubids.1.xml.getsubids 2021-11-18 16:27:33.951053120 +0100
+++ shadow-4.9/man/getsubids.1.xml 2021-11-18 16:27:33.951053120 +0100
@@ -0,0 +1,141 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+ Copyright (c) 2021 Iker Pedrosa
+ All rights reserved.
+
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions
+ are met:
+ 1. Redistributions of source code must retain the above copyright
+ notice, this list of conditions and the following disclaimer.
+ 2. Redistributions in binary form must reproduce the above copyright
+ notice, this list of conditions and the following disclaimer in the
+ documentation and/or other materials provided with the distribution.
+ 3. The name of the copyright holders or contributors may not be used to
+ endorse or promote products derived from this software without
+ specific prior written permission.
+
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+ PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+-->
+<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook V4.5//EN"
+ "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
+<!-- SHADOW-CONFIG-HERE -->
+]>
+
+<refentry id='getsubids.1'>
+ <refentryinfo>
+ <author>
+ <firstname>Iker</firstname>
+ <surname>Pedrosa</surname>
+ <contrib>Creation, 2021</contrib>
+ </author>
+ </refentryinfo>
+ <refmeta>
+ <refentrytitle>getsubids</refentrytitle>
+ <manvolnum>1</manvolnum>
+ <refmiscinfo class="sectdesc">User Commands</refmiscinfo>
+ <refmiscinfo class="source">shadow-utils</refmiscinfo>
+ <refmiscinfo class="version">&SHADOW_UTILS_VERSION;</refmiscinfo>
+ </refmeta>
+ <refnamediv id='name'>
+ <refname>getsubids</refname>
+ <refpurpose>get the subordinate id ranges for a user</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv id='synopsis'>
+ <cmdsynopsis>
+ <command>getsubids</command>
+ <arg choice='opt'>
+ <replaceable>options</replaceable>
+ </arg>
+ <arg choice='plain'>
+ <replaceable>USER</replaceable>
+ </arg>
+ </cmdsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1 id='description'>
+ <title>DESCRIPTION</title>
+ <para>
+ The <command>getsubids</command> command lists the subordinate user ID
+ ranges for a given user. The subordinate group IDs can be listed using
+ the <option>-g</option> option.
+ </para>
+ </refsect1>
+
+ <refsect1 id='options'>
+ <title>OPTIONS</title>
+ <para>
+ The options which apply to the <command>getsubids</command> command are:
+ </para>
+ <variablelist remap='IP'>
+ <varlistentry>
+ <term>
+ <option>-g</option>
+ </term>
+ <listitem>
+ <para>
+ List the subordinate group ID ranges.
+ </para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1 id='example'>
+ <title>EXAMPLE</title>
+ <para>
+ For example, to obtain the subordinate UIDs of the testuser:
+ </para>
+ <para>
+<programlisting>
+$ getsubids testuser
+0: testuser 100000 65536
+</programlisting>
+ </para>
+ <para>
+ This command output provides (in order from left to right) the list
+ index, username, UID range start, and number of UIDs in range.
+ </para>
+ </refsect1>
+
+ <refsect1 id='see_also'>
+ <title>SEE ALSO</title>
+ <para>
+ <citerefentry>
+ <refentrytitle>login.defs</refentrytitle><manvolnum>5</manvolnum>
+ </citerefentry>,
+ <citerefentry>
+ <refentrytitle>newgidmap</refentrytitle><manvolnum>1</manvolnum>
+ </citerefentry>,
+ <citerefentry>
+ <refentrytitle>newuidmap</refentrytitle><manvolnum>1</manvolnum>
+ </citerefentry>,
+ <citerefentry>
+ <refentrytitle>subgid</refentrytitle><manvolnum>5</manvolnum>
+ </citerefentry>,
+ <citerefentry>
+ <refentrytitle>subuid</refentrytitle><manvolnum>5</manvolnum>
+ </citerefentry>,
+ <citerefentry>
+ <refentrytitle>useradd</refentrytitle><manvolnum>8</manvolnum>
+ </citerefentry>,
+ <citerefentry>
+ <refentrytitle>userdel</refentrytitle><manvolnum>8</manvolnum>
+ </citerefentry>.
+ <citerefentry>
+ <refentrytitle>usermod</refentrytitle><manvolnum>8</manvolnum>
+ </citerefentry>,
+ </para>
+ </refsect1>
+</refentry>
diff -up shadow-4.9/man/Makefile.am.getsubids shadow-4.9/man/Makefile.am
--- shadow-4.9/man/Makefile.am.getsubids 2021-07-22 23:55:35.000000000 +0200
+++ shadow-4.9/man/Makefile.am 2021-11-18 16:27:33.951053120 +0100
@@ -62,6 +62,7 @@ man_MANS += $(man_nopam)
endif
man_subids = \
+ man1/getsubids.1 \
man1/newgidmap.1 \
man1/newuidmap.1 \
man5/subgid.5 \
@@ -80,6 +81,7 @@ man_XMANS = \
expiry.1.xml \
faillog.5.xml \
faillog.8.xml \
+ getsubids.1.xml \
gpasswd.1.xml \
groupadd.8.xml \
groupdel.8.xml \
diff -up shadow-4.9/src/getsubids.c.getsubids shadow-4.9/src/getsubids.c
--- shadow-4.9/src/getsubids.c.getsubids 2021-11-18 16:27:33.951053120 +0100
+++ shadow-4.9/src/getsubids.c 2021-11-18 16:27:33.951053120 +0100
@@ -0,0 +1,46 @@
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include "subid.h"
+#include "prototypes.h"
+
+const char *Prog;
+FILE *shadow_logfd = NULL;
+
+void usage(void)
+{
+ fprintf(stderr, "Usage: %s [-g] user\n", Prog);
+ fprintf(stderr, " list subuid ranges for user\n");
+ fprintf(stderr, " pass -g to list subgid ranges\n");
+ exit(EXIT_FAILURE);
+}
+
+int main(int argc, char *argv[])
+{
+ int i, count=0;
+ struct subid_range *ranges;
+ const char *owner;
+
+ Prog = Basename (argv[0]);
+ shadow_logfd = stderr;
+ if (argc < 2)
+ usage();
+ owner = argv[1];
+ if (argc == 3 && strcmp(argv[1], "-g") == 0) {
+ owner = argv[2];
+ count = get_subgid_ranges(owner, &ranges);
+ } else if (argc == 2 && strcmp(argv[1], "-h") == 0) {
+ usage();
+ } else {
+ count = get_subuid_ranges(owner, &ranges);
+ }
+ if (!ranges) {
+ fprintf(stderr, "Error fetching ranges\n");
+ exit(1);
+ }
+ for (i = 0; i < count; i++) {
+ printf("%d: %s %lu %lu\n", i, owner,
+ ranges[i].start, ranges[i].count);
+ }
+ return 0;
+}
diff -up shadow-4.9/src/list_subid_ranges.c.getsubids shadow-4.9/src/list_subid_ranges.c
diff -up shadow-4.9/src/Makefile.am.getsubids shadow-4.9/src/Makefile.am
--- shadow-4.9/src/Makefile.am.getsubids 2021-11-18 16:27:33.943053061 +0100
+++ shadow-4.9/src/Makefile.am 2021-11-18 16:28:03.647272392 +0100
@@ -157,8 +157,8 @@ if FCAPS
setcap cap_setgid+ep $(DESTDIR)$(ubindir)/newgidmap
endif
-noinst_PROGRAMS += list_subid_ranges \
- get_subid_owners \
+bin_PROGRAMS += getsubids
+noinst_PROGRAMS += get_subid_owners \
new_subid_range \
free_subid_range \
check_subid_range
@@ -174,13 +174,13 @@ MISCLIBS = \
$(LIBCRYPT) \
$(LIBTCB)
-list_subid_ranges_LDADD = \
+getsubids_LDADD = \
$(top_builddir)/lib/libshadow.la \
$(top_builddir)/libmisc/libmisc.la \
$(top_builddir)/libsubid/libsubid.la \
$(MISCLIBS) -ldl
-list_subid_ranges_CPPFLAGS = \
+getsubids_CPPFLAGS = \
-I$(top_srcdir)/lib \
-I$(top_srcdir)/libmisc \
-I$(top_srcdir)/libsubid

13
shadow-4.9-groupdel-fix-sigsegv-when-passwd-does-not-exist.patch Normal file
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@ -0,0 +1,13 @@
diff -up shadow-4.9/libmisc/prefix_flag.c.groupdel-fix-sigsegv-when-passwd-does-not-exist shadow-4.9/libmisc/prefix_flag.c
--- shadow-4.9/libmisc/prefix_flag.c.groupdel-fix-sigsegv-when-passwd-does-not-exist 2021-11-19 09:21:36.997091941 +0100
+++ shadow-4.9/libmisc/prefix_flag.c 2021-11-19 09:22:19.001341010 +0100
@@ -288,6 +288,9 @@ extern struct passwd* prefix_getpwent()
if(!passwd_db_file) {
return getpwent();
}
+ if (!fp_pwent) {
+ return NULL;
+ }
return fgetpwent(fp_pwent);
}
extern void prefix_endpwent()

35
shadow-4.9-newgrp-fix-segmentation-fault.patch Normal file
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@ -0,0 +1,35 @@
From 497e90751bc0d95cc998b0f06305040563903948 Mon Sep 17 00:00:00 2001
From: Iker Pedrosa <ipedrosa@redhat.com>
Date: Wed, 10 Nov 2021 12:02:04 +0100
Subject: [PATCH] newgrp: fix segmentation fault
Fix segmentation fault in newgrp when xgetspnam() returns a NULL value
that is immediately freed.
The error was committed in
https://github.com/shadow-maint/shadow/commit/e65cc6aebcb4132fa413f00a905216a5b35b3d57
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=2019553
Signed-off-by: Iker Pedrosa <ipedrosa@redhat.com>
---
src/newgrp.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/src/newgrp.c b/src/newgrp.c
index 730f47e8..566f1c89 100644
--- a/src/newgrp.c
+++ b/src/newgrp.c
@@ -163,8 +163,8 @@ static void check_perms (const struct group *grp,
spwd = xgetspnam (pwd->pw_name);
if (NULL != spwd) {
pwd->pw_passwd = xstrdup (spwd->sp_pwdp);
+ spw_free (spwd);
}
- spw_free (spwd);
if ((pwd->pw_passwd[0] == '\0') && (grp->gr_passwd[0] != '\0')) {
needspasswd = true;
--
2.31.1

30
shadow-4.9-pwck-fix-segfault-when-calling-fprintf.patch Normal file
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@ -0,0 +1,30 @@
From d8e54618feea201987c1f3cb402ed50d1d8b604f Mon Sep 17 00:00:00 2001
From: Iker Pedrosa <ipedrosa@redhat.com>
Date: Mon, 15 Nov 2021 12:40:15 +0100
Subject: [PATCH] pwck: fix segfault when calling fprintf()
As shadow_logfd variable is not set at the beginning of the program if
something fails and fprintf() is called a segmentation fault happens.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=2021339
Signed-off-by: Iker Pedrosa <ipedrosa@redhat.com>
---
src/pwck.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/src/pwck.c b/src/pwck.c
index 4248944a..4ce86af2 100644
--- a/src/pwck.c
+++ b/src/pwck.c
@@ -857,6 +857,7 @@ int main (int argc, char **argv)
* Get my name so that I can use it to report errors.
*/
Prog = Basename (argv[0]);
+ shadow_logfd = stderr;
(void) setlocale (LC_ALL, "");
(void) bindtextdomain (PACKAGE, LOCALEDIR);
--
2.31.1

24
shadow-utils.spec
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@ -1,7 +1,7 @@
Summary: Utilities for managing accounts and shadow password files
Name: shadow-utils
Version: 4.9
Release: 7%{?dist}
Release: 8%{?dist}
Epoch: 2
License: BSD and GPLv2+
URL: https://github.com/shadow-maint/shadow
@ -57,8 +57,16 @@ Patch17: shadow-4.9-libmisc-fix-default-value-in-SHA_get_salt_rounds.patch
Patch18: shadow-4.9-semanage-close-the-selabel-handle.patch
# https://github.com/shadow-maint/shadow/commit/4624e9fca1b02b64e25e8b2280a0186182ab73ba
Patch19: shadow-4.9-revert-useradd-fix-memleak.patch
# https://github.com/shadow-maint/shadow/pull/439
# https://github.com/shadow-maint/shadow/commit/06eb4e4d76ac7f1ac86e68a89b2dc9be7c7323a2
Patch20: shadow-4.9-useradd-copy-tree-argument.patch
# https://github.com/shadow-maint/shadow/commit/d8e54618feea201987c1f3cb402ed50d1d8b604f
Patch21: shadow-4.9-pwck-fix-segfault-when-calling-fprintf.patch
# https://github.com/shadow-maint/shadow/commit/497e90751bc0d95cc998b0f06305040563903948
Patch22: shadow-4.9-newgrp-fix-segmentation-fault.patch
# https://github.com/shadow-maint/shadow/commit/3b6ccf642c6bb2b7db087f09ee563ae9318af734
Patch23: shadow-4.9-getsubids.patch
# https://github.com/shadow-maint/shadow/commit/a757b458ffb4fb9a40bcbb4f7869449431c67f83
Patch24: shadow-4.9-groupdel-fix-sigsegv-when-passwd-does-not-exist.patch
### Dependencies ###
Requires: audit-libs >= 1.6.5
@ -139,6 +147,10 @@ Development files for shadow-utils-subid.
%patch18 -p1 -b .semanage-close-the-selabel-handle
%patch19 -p1 -b .revert-useradd-fix-memleak
%patch20 -p1 -b .useradd-copy-tree-argument
%patch21 -p1 -b .pwck-fix-segfault-when-calling-fprintf
%patch22 -p1 -b .newgrp-fix-segmentation-fault
%patch23 -p1 -b .getsubids
%patch24 -p1 -b .groupdel-fix-sigsegv-when-passwd-does-not-exist
iconv -f ISO88591 -t utf-8 doc/HOWTO > doc/HOWTO.utf8
cp -f doc/HOWTO.utf8 doc/HOWTO
@ -303,12 +315,20 @@ rm -f $RPM_BUILD_ROOT/%{_libdir}/libsubid.la
%files subid
%{_libdir}/libsubid.so.*
%{_bindir}/getsubids
%{_mandir}/man1/getsubids.1*
%files subid-devel
%{includesubiddir}/subid.h
%{_libdir}/libsubid.so
%changelog
* Fri Nov 19 2021 Iker Pedrosa <ipedrosa@redhat.com> - 2:4.9-8
- getsubids: provide system binary and man page (#1980780)
- pwck: fix segfault when calling fprintf() (#2021339)
- newgrp: fix segmentation fault (#2019553)
- groupdel: fix SIGSEGV when passwd does not exist (#1986111)
* Fri Nov 12 2021 Iker Pedrosa <ipedrosa@redhat.com> - 2:4.9-7
- useradd: change SELinux labels for home files (#2022658)