Wed Jan 26 04:37:35 UTC 202220220126043735

l/polkit-0.120-x86_64-2.txz:  Rebuilt.
  [PATCH] pkexec: local privilege escalation.
  Thanks to Qualys Research Labs for reporting this issue.
  For more information, see:
    https://blog.qualys.com/vulnerabilities-threat-research/2022/01/25/pwnkit-local-privilege-escalation-vulnerability-discovered-in-polkits-pkexec-cve-2021-4034
    https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-4034
  (* Security fix *)

2 files changed, 82 insertions, 2 deletions

diff --git a/source/l/polkit/a2bf5c9c83b6ae46cbd5c779d3055bff81ded683.patch b/source/l/polkit/a2bf5c9c83b6ae46cbd5c779d3055bff81ded683.patch
new file mode 100644
index 000000000..a06300a53
--- /dev/null
+++ b/source/l/polkit/a2bf5c9c83b6ae46cbd5c779d3055bff81ded683.patch
@@ -0,0 +1,79 @@
+From a2bf5c9c83b6ae46cbd5c779d3055bff81ded683 Mon Sep 17 00:00:00 2001
+From: Jan Rybar <jrybar@redhat.com>
+Date: Tue, 25 Jan 2022 17:21:46 +0000
+Subject: [PATCH] pkexec: local privilege escalation (CVE-2021-4034)
+
+---
+ src/programs/pkcheck.c |  5 +++++
+ src/programs/pkexec.c  | 23 ++++++++++++++++++++---
+ 2 files changed, 25 insertions(+), 3 deletions(-)
+
+diff --git a/src/programs/pkcheck.c b/src/programs/pkcheck.c
+index f1bb4e1..768525c 100644
+--- a/src/programs/pkcheck.c
++++ b/src/programs/pkcheck.c
+@@ -363,6 +363,11 @@ main (int argc, char *argv[])
+   local_agent_handle = NULL;
+   ret = 126;
+ 
++  if (argc < 1)
++    {
++      exit(126);
++    }
++
+   /* Disable remote file access from GIO. */
+   setenv ("GIO_USE_VFS", "local", 1);
+ 
+diff --git a/src/programs/pkexec.c b/src/programs/pkexec.c
+index 7698c5c..84e5ef6 100644
+--- a/src/programs/pkexec.c
++++ b/src/programs/pkexec.c
+@@ -488,6 +488,15 @@ main (int argc, char *argv[])
+   pid_t pid_of_caller;
+   gpointer local_agent_handle;
+ 
++
++  /*
++   * If 'pkexec' is called THIS wrong, someone's probably evil-doing. Don't be nice, just bail out.
++   */
++  if (argc<1)
++    {
++      exit(127);
++    }
++
+   ret = 127;
+   authority = NULL;
+   subject = NULL;
+@@ -614,10 +623,10 @@ main (int argc, char *argv[])
+ 
+       path = g_strdup (pwstruct.pw_shell);
+       if (!path)
+-	{
++        {
+           g_printerr ("No shell configured or error retrieving pw_shell\n");
+           goto out;
+-	}
++        }
+       /* If you change this, be sure to change the if (!command_line)
+ 	 case below too */
+       command_line = g_strdup (path);
+@@ -636,7 +645,15 @@ main (int argc, char *argv[])
+           goto out;
+         }
+       g_free (path);
+-      argv[n] = path = s;
++      path = s;
++
++      /* argc<2 and pkexec runs just shell, argv is guaranteed to be null-terminated.
++       * /-less shell shouldn't happen, but let's be defensive and don't write to null-termination
++       */
++      if (argv[n] != NULL)
++      {
++        argv[n] = path;
++      }
+     }
+   if (access (path, F_OK) != 0)
+     {
+-- 
+GitLab
+
diff --git a/source/l/polkit/polkit.SlackBuild b/source/l/polkit/polkit.SlackBuild
index 61304ea21..13e1f948f 100755
--- a/source/l/polkit/polkit.SlackBuild
+++ b/source/l/polkit/polkit.SlackBuild
@@ -26,7 +26,7 @@ cd $(dirname $0) ; CWD=$(pwd)
 
 PKGNAM=polkit
 VERSION=${VERSION:-$(echo $PKGNAM-*.tar.?z | rev | cut -f 3- -d . | cut -f 1 -d - | rev)}
-BUILD=${BUILD:-1}
+BUILD=${BUILD:-2}
 
 # Automatically determine the architecture we're building on:
 if [ -z "$ARCH" ]; then
@@ -80,7 +80,8 @@ find . \
  \( -perm 666 -o -perm 664 -o -perm 600 -o -perm 444 -o -perm 440 -o -perm 400 \) \
  -exec chmod 644 {} \+
 
-zcat $CWD/dont-set-wheel-group-as-admin.diff.gz | patch -p1 || exit 1
+zcat $CWD/dont-set-wheel-group-as-admin.diff.gz | patch -p1 --verbose || exit 1
+zcat $CWD/a2bf5c9c83b6ae46cbd5c779d3055bff81ded683.patch.gz | patch -p1 --verbose || exit 1
 
 # https://gitlab.freedesktop.org/polkit/polkit/-/issues/29
 zcat $CWD/0001-configure-fix-elogind-support.patch.gz | patch -p1 || exit 1