diff options
Diffstat (limited to 'source/l/polkit/CVE-2011-1485/0002-Make-PolkitUnixProcess-also-record-the-uid-of-the-pr.patch')
| -rw-r--r-- | source/l/polkit/CVE-2011-1485/0002-Make-PolkitUnixProcess-also-record-the-uid-of-the-pr.patch | 623 |
1 files changed, 623 insertions, 0 deletions
diff --git a/source/l/polkit/CVE-2011-1485/0002-Make-PolkitUnixProcess-also-record-the-uid-of-the-pr.patch b/source/l/polkit/CVE-2011-1485/0002-Make-PolkitUnixProcess-also-record-the-uid-of-the-pr.patch new file mode 100644 index 00000000..81a163c6 --- /dev/null +++ b/source/l/polkit/CVE-2011-1485/0002-Make-PolkitUnixProcess-also-record-the-uid-of-the-pr.patch @@ -0,0 +1,623 @@ +From 129b6223a19e7fb2753f8cad7957ac5402394076 Mon Sep 17 00:00:00 2001 +From: David Zeuthen <davidz@redhat.com> +Date: Fri, 1 Apr 2011 12:09:45 -0400 +Subject: [PATCH 2/4] Make PolkitUnixProcess also record the uid of the + process + +This is needed to avoid possible TOCTTOU issues since a process can +change both its real uid and effective uid. + +Signed-off-by: David Zeuthen <davidz@redhat.com> +--- + docs/polkit/polkit-1-sections.txt | 7 +- + src/polkit/polkitsubject.c | 25 +++- + src/polkit/polkitunixprocess.c | 346 +++++++++++++++++++++++++------------ + src/polkit/polkitunixprocess.h | 18 ++- + 4 files changed, 278 insertions(+), 118 deletions(-) + +diff --git a/docs/polkit/polkit-1-sections.txt b/docs/polkit/polkit-1-sections.txt +index 12141e3..9f4fcf8 100644 +--- a/docs/polkit/polkit-1-sections.txt ++++ b/docs/polkit/polkit-1-sections.txt +@@ -145,10 +145,13 @@ POLKIT_UNIX_SESSION_GET_CLASS + PolkitUnixProcess + polkit_unix_process_new + polkit_unix_process_new_full ++polkit_unix_process_new_for_owner ++polkit_unix_process_set_pid + polkit_unix_process_get_pid ++polkit_unix_process_set_start_time + polkit_unix_process_get_start_time +-polkit_unix_process_set_pid +-polkit_unix_process_get_owner ++polkit_unix_process_set_uid ++polkit_unix_process_get_uid + <SUBSECTION Standard> + PolkitUnixProcessClass + POLKIT_UNIX_PROCESS +diff --git a/src/polkit/polkitsubject.c b/src/polkit/polkitsubject.c +index 577afec..d2c4c20 100644 +--- a/src/polkit/polkitsubject.c ++++ b/src/polkit/polkitsubject.c +@@ -238,13 +238,18 @@ polkit_subject_from_string (const gchar *str, + { + gint scanned_pid; + guint64 scanned_starttime; +- if (sscanf (str, "unix-process:%d:%" G_GUINT64_FORMAT, &scanned_pid, &scanned_starttime) == 2) ++ gint scanned_uid; ++ if (sscanf (str, "unix-process:%d:%" G_GUINT64_FORMAT ":%d", &scanned_pid, &scanned_starttime, &scanned_uid) == 3) ++ { ++ subject = polkit_unix_process_new_for_owner (scanned_pid, scanned_starttime, scanned_uid); ++ } ++ else if (sscanf (str, "unix-process:%d:%" G_GUINT64_FORMAT, &scanned_pid, &scanned_starttime) == 2) + { + subject = polkit_unix_process_new_full (scanned_pid, scanned_starttime); + } + else if (sscanf (str, "unix-process:%d", &scanned_pid) == 1) + { +- subject = polkit_unix_process_new_full (scanned_pid, 0); ++ subject = polkit_unix_process_new (scanned_pid); + if (polkit_unix_process_get_start_time (POLKIT_UNIX_PROCESS (subject)) == 0) + { + g_object_unref (subject); +@@ -297,6 +302,8 @@ polkit_subject_to_gvariant (PolkitSubject *subject) + g_variant_new_uint32 (polkit_unix_process_get_pid (POLKIT_UNIX_PROCESS (subject)))); + g_variant_builder_add (&builder, "{sv}", "start-time", + g_variant_new_uint64 (polkit_unix_process_get_start_time (POLKIT_UNIX_PROCESS (subject)))); ++ g_variant_builder_add (&builder, "{sv}", "uid", ++ g_variant_new_int32 (polkit_unix_process_get_uid (POLKIT_UNIX_PROCESS (subject)))); + } + else if (POLKIT_IS_UNIX_SESSION (subject)) + { +@@ -395,6 +402,7 @@ polkit_subject_new_for_gvariant (GVariant *variant, + GVariant *v; + guint32 pid; + guint64 start_time; ++ gint32 uid; + + v = lookup_asv (details_gvariant, "pid", G_VARIANT_TYPE_UINT32, error); + if (v == NULL) +@@ -414,7 +422,18 @@ polkit_subject_new_for_gvariant (GVariant *variant, + start_time = g_variant_get_uint64 (v); + g_variant_unref (v); + +- ret = polkit_unix_process_new_full (pid, start_time); ++ v = lookup_asv (details_gvariant, "uid", G_VARIANT_TYPE_INT32, error); ++ if (v != NULL) ++ { ++ uid = g_variant_get_int32 (v); ++ g_variant_unref (v); ++ } ++ else ++ { ++ uid = -1; ++ } ++ ++ ret = polkit_unix_process_new_for_owner (pid, start_time, uid); + } + else if (g_strcmp0 (kind, "unix-session") == 0) + { +diff --git a/src/polkit/polkitunixprocess.c b/src/polkit/polkitunixprocess.c +index 876da69..913be3a 100644 +--- a/src/polkit/polkitunixprocess.c ++++ b/src/polkit/polkitunixprocess.c +@@ -62,6 +62,7 @@ struct _PolkitUnixProcess + + gint pid; + guint64 start_time; ++ gint uid; + }; + + struct _PolkitUnixProcessClass +@@ -74,6 +75,7 @@ enum + PROP_0, + PROP_PID, + PROP_START_TIME, ++ PROP_UID + }; + + static void subject_iface_init (PolkitSubjectIface *subject_iface); +@@ -81,6 +83,9 @@ static void subject_iface_init (PolkitSubjectIface *subject_iface); + static guint64 get_start_time_for_pid (gint pid, + GError **error); + ++static gint _polkit_unix_process_get_owner (PolkitUnixProcess *process, ++ GError **error); ++ + #ifdef HAVE_FREEBSD + static gboolean get_kinfo_proc (gint pid, struct kinfo_proc *p); + #endif +@@ -92,6 +97,7 @@ G_DEFINE_TYPE_WITH_CODE (PolkitUnixProcess, polkit_unix_process, G_TYPE_OBJECT, + static void + polkit_unix_process_init (PolkitUnixProcess *unix_process) + { ++ unix_process->uid = -1; + } + + static void +@@ -108,6 +114,10 @@ polkit_unix_process_get_property (GObject *object, + g_value_set_int (value, unix_process->pid); + break; + ++ case PROP_UID: ++ g_value_set_int (value, unix_process->uid); ++ break; ++ + case PROP_START_TIME: + g_value_set_uint64 (value, unix_process->start_time); + break; +@@ -132,6 +142,14 @@ polkit_unix_process_set_property (GObject *object, + polkit_unix_process_set_pid (unix_process, g_value_get_int (value)); + break; + ++ case PROP_UID: ++ polkit_unix_process_set_uid (unix_process, g_value_get_int (value)); ++ break; ++ ++ case PROP_START_TIME: ++ polkit_unix_process_set_start_time (unix_process, g_value_get_uint64 (value)); ++ break; ++ + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); + break; +@@ -139,12 +157,39 @@ polkit_unix_process_set_property (GObject *object, + } + + static void ++polkit_unix_process_constructed (GObject *object) ++{ ++ PolkitUnixProcess *process = POLKIT_UNIX_PROCESS (object); ++ ++ /* sets start_time and uid in case they are unset */ ++ ++ if (process->start_time == 0) ++ process->start_time = get_start_time_for_pid (process->pid, NULL); ++ ++ if (process->uid == -1) ++ { ++ GError *error; ++ error = NULL; ++ process->uid = _polkit_unix_process_get_owner (process, &error); ++ if (error != NULL) ++ { ++ process->uid = -1; ++ g_error_free (error); ++ } ++ } ++ ++ if (G_OBJECT_CLASS (polkit_unix_process_parent_class)->constructed != NULL) ++ G_OBJECT_CLASS (polkit_unix_process_parent_class)->constructed (object); ++} ++ ++static void + polkit_unix_process_class_init (PolkitUnixProcessClass *klass) + { + GObjectClass *gobject_class = G_OBJECT_CLASS (klass); + + gobject_class->get_property = polkit_unix_process_get_property; + gobject_class->set_property = polkit_unix_process_set_property; ++ gobject_class->constructed = polkit_unix_process_constructed; + + /** + * PolkitUnixProcess:pid: +@@ -156,7 +201,7 @@ polkit_unix_process_class_init (PolkitUnixProcessClass *klass) + g_param_spec_int ("pid", + "Process ID", + "The UNIX process ID", +- -1, ++ 0, + G_MAXINT, + 0, + G_PARAM_CONSTRUCT | +@@ -166,6 +211,27 @@ polkit_unix_process_class_init (PolkitUnixProcessClass *klass) + G_PARAM_STATIC_NICK)); + + /** ++ * PolkitUnixProcess:uid: ++ * ++ * The UNIX user id of the process or -1 if unknown. ++ * ++ * Note that this is the real user-id, not the effective user-id. ++ */ ++ g_object_class_install_property (gobject_class, ++ PROP_UID, ++ g_param_spec_int ("uid", ++ "User ID", ++ "The UNIX user ID", ++ -1, ++ G_MAXINT, ++ -1, ++ G_PARAM_CONSTRUCT | ++ G_PARAM_READWRITE | ++ G_PARAM_STATIC_NAME | ++ G_PARAM_STATIC_BLURB | ++ G_PARAM_STATIC_NICK)); ++ ++ /** + * PolkitUnixProcess:start-time: + * + * The start time of the process. +@@ -178,7 +244,8 @@ polkit_unix_process_class_init (PolkitUnixProcessClass *klass) + 0, + G_MAXUINT64, + 0, +- G_PARAM_READABLE | ++ G_PARAM_CONSTRUCT | ++ G_PARAM_READWRITE | + G_PARAM_STATIC_NAME | + G_PARAM_STATIC_BLURB | + G_PARAM_STATIC_NICK)); +@@ -186,113 +253,50 @@ polkit_unix_process_class_init (PolkitUnixProcessClass *klass) + } + + /** +- * polkit_unix_process_get_pid: ++ * polkit_unix_process_get_uid: + * @process: A #PolkitUnixProcess. + * +- * Gets the process id for @process. ++ * Gets the user id for @process. Note that this is the real user-id, ++ * not the effective user-id. + * +- * Returns: The process id for @process. ++ * Returns: The user id for @process or -1 if unknown. + */ + gint +-polkit_unix_process_get_pid (PolkitUnixProcess *process) ++polkit_unix_process_get_uid (PolkitUnixProcess *process) + { +- g_return_val_if_fail (POLKIT_IS_UNIX_PROCESS (process), 0); +- return process->pid; ++ g_return_val_if_fail (POLKIT_IS_UNIX_PROCESS (process), -1); ++ return process->uid; + } + + /** +- * polkit_unix_process_get_owner: ++ * polkit_unix_process_set_uid: + * @process: A #PolkitUnixProcess. +- * @error: (allow-none): Return location for error or %NULL. ++ * @uid: The user id to set for @process or -1 to unset it. + * +- * Gets the uid of the owner of @process. ++ * Sets the (real, not effective) user id for @process. ++ */ ++void ++polkit_unix_process_set_uid (PolkitUnixProcess *process, ++ gint uid) ++{ ++ g_return_if_fail (POLKIT_IS_UNIX_PROCESS (process)); ++ g_return_if_fail (uid >= -1); ++ process->uid = uid; ++} ++ ++/** ++ * polkit_unix_process_get_pid: ++ * @process: A #PolkitUnixProcess. + * +- * Note that this returns the real user-id (not the effective user-id) of @process. ++ * Gets the process id for @process. + * +- * Returns: The UNIX user id of the owner for @process or 0 if @error is set. +- **/ ++ * Returns: The process id for @process. ++ */ + gint +-polkit_unix_process_get_owner (PolkitUnixProcess *process, +- GError **error) ++polkit_unix_process_get_pid (PolkitUnixProcess *process) + { +- gint result; +- gchar *contents; +- gchar **lines; +-#ifdef HAVE_FREEBSD +- struct kinfo_proc p; +-#else +- gchar filename[64]; +- guint n; +-#endif +- + g_return_val_if_fail (POLKIT_IS_UNIX_PROCESS (process), 0); +- g_return_val_if_fail (error == NULL || *error == NULL, 0); +- +- result = 0; +- lines = NULL; +- contents = NULL; +- +-#ifdef HAVE_FREEBSD +- if (get_kinfo_proc (process->pid, &p) == 0) +- { +- g_set_error (error, +- POLKIT_ERROR, +- POLKIT_ERROR_FAILED, +- "get_kinfo_proc() failed for pid %d: %s", +- process->pid, +- g_strerror (errno)); +- goto out; +- } +- +- result = p.ki_uid; +-#else +- +- /* see 'man proc' for layout of the status file +- * +- * Uid, Gid: Real, effective, saved set, and file system UIDs (GIDs). +- */ +- g_snprintf (filename, sizeof filename, "/proc/%d/status", process->pid); +- if (!g_file_get_contents (filename, +- &contents, +- NULL, +- error)) +- { +- goto out; +- } +- lines = g_strsplit (contents, "\n", -1); +- for (n = 0; lines != NULL && lines[n] != NULL; n++) +- { +- gint real_uid, effective_uid; +- if (!g_str_has_prefix (lines[n], "Uid:")) +- continue; +- if (sscanf (lines[n] + 4, "%d %d", &real_uid, &effective_uid) != 2) +- { +- g_set_error (error, +- POLKIT_ERROR, +- POLKIT_ERROR_FAILED, +- "Unexpected line `%s' in file %s", +- lines[n], +- filename); +- goto out; +- } +- else +- { +- result = real_uid; +- goto out; +- } +- } +- +- g_set_error (error, +- POLKIT_ERROR, +- POLKIT_ERROR_FAILED, +- "Didn't find any line starting with `Uid:' in file %s", +- filename); +-#endif +- +-out: +- g_strfreev (lines); +- g_free (contents); +- return result; ++ return process->pid; + } + + /** +@@ -311,6 +315,21 @@ polkit_unix_process_get_start_time (PolkitUnixProcess *process) + } + + /** ++ * polkit_unix_process_set_start_time: ++ * @process: A #PolkitUnixProcess. ++ * @start_time: The start time for @pid. ++ * ++ * Set the start time of @process. ++ */ ++void ++polkit_unix_process_set_start_time (PolkitUnixProcess *process, ++ guint64 start_time) ++{ ++ g_return_if_fail (POLKIT_IS_UNIX_PROCESS (process)); ++ process->start_time = start_time; ++} ++ ++/** + * polkit_unix_process_set_pid: + * @process: A #PolkitUnixProcess. + * @pid: A process id. +@@ -323,18 +342,17 @@ polkit_unix_process_set_pid (PolkitUnixProcess *process, + { + g_return_if_fail (POLKIT_IS_UNIX_PROCESS (process)); + process->pid = pid; +- if (pid != (gint) -1) +- process->start_time = get_start_time_for_pid (pid, NULL); + } + + /** + * polkit_unix_process_new: + * @pid: The process id. + * +- * Creates a new #PolkitUnixProcess for @pid. The start time of the +- * process will be looked up in using e.g. the +- * <filename>/proc</filename> filesystem depending on the platform in +- * use. ++ * Creates a new #PolkitUnixProcess for @pid. ++ * ++ * The uid and start time of the process will be looked up in using ++ * e.g. the <filename>/proc</filename> filesystem depending on the ++ * platform in use. + * + * Returns: (transfer full): A #PolkitSubject. Free with g_object_unref(). + */ +@@ -353,22 +371,42 @@ polkit_unix_process_new (gint pid) + * + * Creates a new #PolkitUnixProcess object for @pid and @start_time. + * ++ * The uid of the process will be looked up in using e.g. the ++ * <filename>/proc</filename> filesystem depending on the platform in ++ * use. ++ * + * Returns: (transfer full): A #PolkitSubject. Free with g_object_unref(). + */ + PolkitSubject * + polkit_unix_process_new_full (gint pid, + guint64 start_time) + { +- PolkitUnixProcess *process; +- +- process = POLKIT_UNIX_PROCESS (polkit_unix_process_new ((gint) -1)); +- process->pid = pid; +- if (start_time != 0) +- process->start_time = start_time; +- else +- process->start_time = get_start_time_for_pid (pid, NULL); ++ return POLKIT_SUBJECT (g_object_new (POLKIT_TYPE_UNIX_PROCESS, ++ "pid", pid, ++ "start_time", start_time, ++ NULL)); ++} + +- return POLKIT_SUBJECT (process); ++/** ++ * polkit_unix_process_new_for_owner: ++ * @pid: The process id. ++ * @start_time: The start time for @pid or 0 to look it up in e.g. <filename>/proc</filename>. ++ * @uid: The (real, not effective) uid of the owner of @pid or -1 to look it up in e.g. <filename>/proc</filename>. ++ * ++ * Creates a new #PolkitUnixProcess object for @pid, @start_time and @uid. ++ * ++ * Returns: (transfer full): A #PolkitSubject. Free with g_object_unref(). ++ */ ++PolkitSubject * ++polkit_unix_process_new_for_owner (gint pid, ++ guint64 start_time, ++ gint uid) ++{ ++ return POLKIT_SUBJECT (g_object_new (POLKIT_TYPE_UNIX_PROCESS, ++ "pid", pid, ++ "start_time", start_time, ++ "uid", uid, ++ NULL)); + } + + static guint +@@ -616,3 +654,95 @@ out: + + return start_time; + } ++ ++static gint ++_polkit_unix_process_get_owner (PolkitUnixProcess *process, ++ GError **error) ++{ ++ gint result; ++ gchar *contents; ++ gchar **lines; ++#ifdef HAVE_FREEBSD ++ struct kinfo_proc p; ++#else ++ gchar filename[64]; ++ guint n; ++#endif ++ ++ g_return_val_if_fail (POLKIT_IS_UNIX_PROCESS (process), 0); ++ g_return_val_if_fail (error == NULL || *error == NULL, 0); ++ ++ result = 0; ++ lines = NULL; ++ contents = NULL; ++ ++#ifdef HAVE_FREEBSD ++ if (get_kinfo_proc (process->pid, &p) == 0) ++ { ++ g_set_error (error, ++ POLKIT_ERROR, ++ POLKIT_ERROR_FAILED, ++ "get_kinfo_proc() failed for pid %d: %s", ++ process->pid, ++ g_strerror (errno)); ++ goto out; ++ } ++ ++ result = p.ki_uid; ++#else ++ ++ /* see 'man proc' for layout of the status file ++ * ++ * Uid, Gid: Real, effective, saved set, and file system UIDs (GIDs). ++ */ ++ g_snprintf (filename, sizeof filename, "/proc/%d/status", process->pid); ++ if (!g_file_get_contents (filename, ++ &contents, ++ NULL, ++ error)) ++ { ++ goto out; ++ } ++ lines = g_strsplit (contents, "\n", -1); ++ for (n = 0; lines != NULL && lines[n] != NULL; n++) ++ { ++ gint real_uid, effective_uid; ++ if (!g_str_has_prefix (lines[n], "Uid:")) ++ continue; ++ if (sscanf (lines[n] + 4, "%d %d", &real_uid, &effective_uid) != 2) ++ { ++ g_set_error (error, ++ POLKIT_ERROR, ++ POLKIT_ERROR_FAILED, ++ "Unexpected line `%s' in file %s", ++ lines[n], ++ filename); ++ goto out; ++ } ++ else ++ { ++ result = real_uid; ++ goto out; ++ } ++ } ++ ++ g_set_error (error, ++ POLKIT_ERROR, ++ POLKIT_ERROR_FAILED, ++ "Didn't find any line starting with `Uid:' in file %s", ++ filename); ++#endif ++ ++out: ++ g_strfreev (lines); ++ g_free (contents); ++ return result; ++} ++ ++/* deprecated public method */ ++gint ++polkit_unix_process_get_owner (PolkitUnixProcess *process, ++ GError **error) ++{ ++ return _polkit_unix_process_get_owner (process, error); ++} +diff --git a/src/polkit/polkitunixprocess.h b/src/polkit/polkitunixprocess.h +index b88cd03..531a57d 100644 +--- a/src/polkit/polkitunixprocess.h ++++ b/src/polkit/polkitunixprocess.h +@@ -47,16 +47,24 @@ typedef struct _PolkitUnixProcess PolkitUnixProcess; + typedef struct _PolkitUnixProcessClass PolkitUnixProcessClass; + + GType polkit_unix_process_get_type (void) G_GNUC_CONST; +-PolkitSubject *polkit_unix_process_new (gint pid); +-PolkitSubject *polkit_unix_process_new_full (gint pid, +- guint64 start_time); +- ++PolkitSubject *polkit_unix_process_new (gint pid); ++PolkitSubject *polkit_unix_process_new_full (gint pid, ++ guint64 start_time); ++PolkitSubject *polkit_unix_process_new_for_owner (gint pid, ++ guint64 start_time, ++ gint uid); + gint polkit_unix_process_get_pid (PolkitUnixProcess *process); + guint64 polkit_unix_process_get_start_time (PolkitUnixProcess *process); ++gint polkit_unix_process_get_uid (PolkitUnixProcess *process); + void polkit_unix_process_set_pid (PolkitUnixProcess *process, + gint pid); ++void polkit_unix_process_set_uid (PolkitUnixProcess *process, ++ gint uid); ++void polkit_unix_process_set_start_time (PolkitUnixProcess *process, ++ guint64 start_time); ++ + gint polkit_unix_process_get_owner (PolkitUnixProcess *process, +- GError **error); ++ GError **error) G_GNUC_DEPRECATED_FOR (polkit_unix_process_get_uid); + + G_END_DECLS + +-- +1.7.4.4 + |