[libvirt] [PATCH 07/14] Remove all direct use of getenv
Daniel P. Berrange
berrange at redhat.com
Mon Oct 21 13:12:42 UTC 2013
From: "Daniel P. Berrange" <berrange at redhat.com>
Unconditional use of getenv is not secure in setuid env.
While not all libvirt code runs in a setuid env (since
much of it only exists inside libvirtd) this is not always
clear to developers. So make all the code paranoid, even
if it only ever runs inside libvirtd.
Signed-off-by: Daniel P. Berrange <berrange at redhat.com>
---
daemon/libvirtd.c | 2 +-
src/driver.c | 3 ++-
src/libvirt.c | 2 +-
src/locking/lock_daemon.c | 4 ++--
src/locking/lock_driver_lockd.c | 2 +-
src/locking/lock_manager.c | 2 +-
src/lxc/lxc_driver.c | 4 ++--
src/remote/remote_driver.c | 4 ++--
src/rpc/virnettlscontext.c | 4 ++--
src/util/virauth.c | 2 +-
src/util/virfile.c | 7 +++++--
src/util/virlog.c | 8 ++++----
src/util/virrandom.c | 2 +-
src/util/virutil.c | 8 ++++----
src/vbox/vbox_XPCOMCGlue.c | 2 +-
src/vbox/vbox_tmpl.c | 4 ++--
tools/virsh.c | 18 +++++++++---------
17 files changed, 41 insertions(+), 37 deletions(-)
diff --git a/daemon/libvirtd.c b/daemon/libvirtd.c
index 99c0342..aef1546 100644
--- a/daemon/libvirtd.c
+++ b/daemon/libvirtd.c
@@ -991,7 +991,7 @@ static int migrateProfile(void)
goto cleanup;
}
- config_home = getenv("XDG_CONFIG_HOME");
+ config_home = virGetEnvBlockSUID("XDG_CONFIG_HOME");
if (config_home && config_home[0] != '\0') {
if (VIR_STRDUP(xdg_dir, config_home) < 0)
goto cleanup;
diff --git a/src/driver.c b/src/driver.c
index a08dd34..ab2a253 100644
--- a/src/driver.c
+++ b/src/driver.c
@@ -27,6 +27,7 @@
#include "driver.h"
#include "viralloc.h"
#include "virlog.h"
+#include "virutil.h"
#include "configmake.h"
#include "virstring.h"
@@ -43,7 +44,7 @@ static const char *moddir = NULL;
void
virDriverModuleInitialize(const char *defmoddir)
{
- const char *custommoddir = getenv("LIBVIRT_DRIVER_DIR");
+ const char *custommoddir = virGetEnvBlockSUID("LIBVIRT_DRIVER_DIR");
if (custommoddir)
moddir = custommoddir;
else if (defmoddir)
diff --git a/src/libvirt.c b/src/libvirt.c
index 7ceec30..0f8d79a 100644
--- a/src/libvirt.c
+++ b/src/libvirt.c
@@ -1094,7 +1094,7 @@ virConnectGetDefaultURI(virConfPtr conf,
{
int ret = -1;
virConfValuePtr value = NULL;
- char *defname = getenv("LIBVIRT_DEFAULT_URI");
+ const char *defname = virGetEnvBlockSUID("LIBVIRT_DEFAULT_URI");
if (defname && *defname) {
VIR_DEBUG("Using LIBVIRT_DEFAULT_URI '%s'", defname);
*name = defname;
diff --git a/src/locking/lock_daemon.c b/src/locking/lock_daemon.c
index 5f675ef..cef5bd6 100644
--- a/src/locking/lock_daemon.c
+++ b/src/locking/lock_daemon.c
@@ -605,7 +605,7 @@ virLockDaemonSetupNetworkingSystemD(virNetServerPtr srv)
VIR_DEBUG("Setting up networking from systemd");
- if (!(pidstr = getenv("LISTEN_PID"))) {
+ if (!(pidstr = virGetEnvAllowSUID("LISTEN_PID"))) {
VIR_DEBUG("No LISTEN_FDS from systemd");
return 0;
}
@@ -621,7 +621,7 @@ virLockDaemonSetupNetworkingSystemD(virNetServerPtr srv)
return 0;
}
- if (!(fdstr = getenv("LISTEN_FDS"))) {
+ if (!(fdstr = virGetEnvAllowSUID("LISTEN_FDS"))) {
VIR_DEBUG("No LISTEN_FDS from systemd");
return 0;
}
diff --git a/src/locking/lock_driver_lockd.c b/src/locking/lock_driver_lockd.c
index b115799..86ce2d8 100644
--- a/src/locking/lock_driver_lockd.c
+++ b/src/locking/lock_driver_lockd.c
@@ -84,7 +84,7 @@ static virLockManagerLockDaemonDriverPtr driver = NULL;
static const char *
virLockManagerLockDaemonFindDaemon(void)
{
- const char *customDaemon = getenv("VIRTLOCKD_PATH");
+ const char *customDaemon = virGetEnvBlockSUID("VIRTLOCKD_PATH");
if (customDaemon)
return customDaemon;
diff --git a/src/locking/lock_manager.c b/src/locking/lock_manager.c
index aff54c0..f09c168 100644
--- a/src/locking/lock_manager.c
+++ b/src/locking/lock_manager.c
@@ -135,7 +135,7 @@ virLockManagerPluginPtr virLockManagerPluginNew(const char *name,
void *handle = NULL;
virLockDriverPtr driver;
virLockManagerPluginPtr plugin = NULL;
- const char *moddir = getenv("LIBVIRT_LOCK_MANAGER_PLUGIN_DIR");
+ const char *moddir = virGetEnvBlockSUID("LIBVIRT_LOCK_MANAGER_PLUGIN_DIR");
char *modfile = NULL;
char *configFile = NULL;
diff --git a/src/lxc/lxc_driver.c b/src/lxc/lxc_driver.c
index 870e4a9..61a90ca 100644
--- a/src/lxc/lxc_driver.c
+++ b/src/lxc/lxc_driver.c
@@ -1362,14 +1362,14 @@ static int lxcStateInitialize(bool privileged,
void *opaque ATTRIBUTE_UNUSED)
{
virCapsPtr caps = NULL;
- char *ld;
+ const char *ld;
virLXCDriverConfigPtr cfg = NULL;
/* Valgrind gets very annoyed when we clone containers, so
* disable LXC when under valgrind
* XXX remove this when valgrind is fixed
*/
- ld = getenv("LD_PRELOAD");
+ ld = virGetEnvBlockSUID("LD_PRELOAD");
if (ld && strstr(ld, "vgpreload")) {
VIR_INFO("Running under valgrind, disabling driver");
return 0;
diff --git a/src/remote/remote_driver.c b/src/remote/remote_driver.c
index 115d0bc..759383e 100644
--- a/src/remote/remote_driver.c
+++ b/src/remote/remote_driver.c
@@ -187,7 +187,7 @@ remoteFindDaemonPath(void)
NULL
};
size_t i;
- const char *customDaemon = getenv("LIBVIRTD_PATH");
+ const char *customDaemon = virGetEnvBlockSUID("LIBVIRTD_PATH");
if (customDaemon)
return customDaemon;
@@ -955,7 +955,7 @@ remoteConnectOpen(virConnectPtr conn,
{
struct private_data *priv;
int ret, rflags = 0;
- const char *autostart = getenv("LIBVIRT_AUTOSTART");
+ const char *autostart = virGetEnvBlockSUID("LIBVIRT_AUTOSTART");
if (inside_daemon && (!conn->uri || (conn->uri && !conn->uri->server)))
return VIR_DRV_OPEN_DECLINED;
diff --git a/src/rpc/virnettlscontext.c b/src/rpc/virnettlscontext.c
index 7cee27c..cd69794 100644
--- a/src/rpc/virnettlscontext.c
+++ b/src/rpc/virnettlscontext.c
@@ -710,7 +710,7 @@ static virNetTLSContextPtr virNetTLSContextNew(const char *cacert,
bool isServer)
{
virNetTLSContextPtr ctxt;
- char *gnutlsdebug;
+ const char *gnutlsdebug;
int err;
if (virNetTLSContextInitialize() < 0)
@@ -719,7 +719,7 @@ static virNetTLSContextPtr virNetTLSContextNew(const char *cacert,
if (!(ctxt = virObjectLockableNew(virNetTLSContextClass)))
return NULL;
- if ((gnutlsdebug = getenv("LIBVIRT_GNUTLS_DEBUG")) != NULL) {
+ if ((gnutlsdebug = virGetEnvAllowSUID("LIBVIRT_GNUTLS_DEBUG")) != NULL) {
int val;
if (virStrToLong_i(gnutlsdebug, NULL, 10, &val) < 0)
val = 10;
diff --git a/src/util/virauth.c b/src/util/virauth.c
index f58797c..e66cbf5 100644
--- a/src/util/virauth.c
+++ b/src/util/virauth.c
@@ -42,7 +42,7 @@ virAuthGetConfigFilePathURI(virURIPtr uri,
{
int ret = -1;
size_t i;
- const char *authenv = getenv("LIBVIRT_AUTH_FILE");
+ const char *authenv = virGetEnvBlockSUID("LIBVIRT_AUTH_FILE");
char *userdir = NULL;
*path = NULL;
diff --git a/src/util/virfile.c b/src/util/virfile.c
index f6fd2a8..bc607a5 100644
--- a/src/util/virfile.c
+++ b/src/util/virfile.c
@@ -1426,6 +1426,7 @@ virFileIsLink(const char *linkpath)
char *
virFindFileInPath(const char *file)
{
+ const char *origpath = NULL;
char *path = NULL;
char *pathiter;
char *pathseg;
@@ -1454,9 +1455,11 @@ virFindFileInPath(const char *file)
}
/* copy PATH env so we can tweak it */
- path = getenv("PATH");
+ origpath = virGetEnvBlockSUID("PATH");
+ if (!origpath)
+ origpath = "/bin:/usr/bin";
- if (VIR_STRDUP_QUIET(path, path) <= 0)
+ if (VIR_STRDUP_QUIET(path, origpath) <= 0)
return NULL;
/* for each path segment, append the file to search for and test for
diff --git a/src/util/virlog.c b/src/util/virlog.c
index 997d582..5b7e7b0 100644
--- a/src/util/virlog.c
+++ b/src/util/virlog.c
@@ -1637,18 +1637,18 @@ virLogParseDefaultPriority(const char *priority)
void
virLogSetFromEnv(void)
{
- char *debugEnv;
+ const char *debugEnv;
if (virLogInitialize() < 0)
return;
- debugEnv = getenv("LIBVIRT_DEBUG");
+ debugEnv = virGetEnvAllowSUID("LIBVIRT_DEBUG");
if (debugEnv && *debugEnv)
virLogParseDefaultPriority(debugEnv);
- debugEnv = getenv("LIBVIRT_LOG_FILTERS");
+ debugEnv = virGetEnvAllowSUID("LIBVIRT_LOG_FILTERS");
if (debugEnv && *debugEnv)
virLogParseFilters(debugEnv);
- debugEnv = getenv("LIBVIRT_LOG_OUTPUTS");
+ debugEnv = virGetEnvAllowSUID("LIBVIRT_LOG_OUTPUTS");
if (debugEnv && *debugEnv)
virLogParseOutputs(debugEnv);
}
diff --git a/src/util/virrandom.c b/src/util/virrandom.c
index b0912f4..491a3af 100644
--- a/src/util/virrandom.c
+++ b/src/util/virrandom.c
@@ -66,7 +66,7 @@ virRandomOnceInit(void)
/* Normally we want a decent seed. But if reproducible debugging
* of a fixed pseudo-random sequence is ever required, uncomment
* this block to let an environment variable force the seed. */
- const char *debug = getenv("VIR_DEBUG_RANDOM_SEED");
+ const char *debug = virGetEnvBlockSUID("VIR_DEBUG_RANDOM_SEED");
if (debug && virStrToLong_ui(debug, NULL, 0, &seed) < 0)
return -1;
diff --git a/src/util/virutil.c b/src/util/virutil.c
index 7e7c1c2..7e24b4a 100644
--- a/src/util/virutil.c
+++ b/src/util/virutil.c
@@ -782,7 +782,7 @@ virGetUserDirectoryByUID(uid_t uid)
static char *virGetXDGDirectory(const char *xdgenvname, const char *xdgdefdir)
{
- const char *path = getenv(xdgenvname);
+ const char *path = virGetEnvBlockSUID(xdgenvname);
char *ret = NULL;
char *home = NULL;
@@ -810,7 +810,7 @@ char *virGetUserCacheDirectory(void)
char *virGetUserRuntimeDirectory(void)
{
- const char *path = getenv("XDG_RUNTIME_DIR");
+ const char *path = virGetEnvBlockSUID("XDG_RUNTIME_DIR");
if (!path || !path[0]) {
return virGetUserCacheDirectory();
@@ -1143,7 +1143,7 @@ virGetUserDirectoryByUID(uid_t uid ATTRIBUTE_UNUSED)
const char *dir;
char *ret;
- dir = getenv("HOME");
+ dir = virGetEnvBlockSUID("HOME");
/* Only believe HOME if it is an absolute path and exists */
if (dir) {
@@ -1163,7 +1163,7 @@ virGetUserDirectoryByUID(uid_t uid ATTRIBUTE_UNUSED)
if (!dir)
/* USERPROFILE is probably the closest equivalent to $HOME? */
- dir = getenv("USERPROFILE");
+ dir = virGetEnvBlockSUID("USERPROFILE");
if (VIR_STRDUP(ret, dir) < 0)
return NULL;
diff --git a/src/vbox/vbox_XPCOMCGlue.c b/src/vbox/vbox_XPCOMCGlue.c
index 10ddcf8..8652e3a 100644
--- a/src/vbox/vbox_XPCOMCGlue.c
+++ b/src/vbox/vbox_XPCOMCGlue.c
@@ -201,7 +201,7 @@ VBoxCGlueInit(unsigned int *version)
"/usr/local/lib/VirtualBox",
"/Applications/VirtualBox.app/Contents/MacOS"
};
- const char *home = getenv("VBOX_APP_HOME");
+ const char *home = virGetEnvBlockSUID("VBOX_APP_HOME");
/* If the user specifies the location, try only that. */
if (home != NULL) {
diff --git a/src/vbox/vbox_tmpl.c b/src/vbox/vbox_tmpl.c
index cf34f5c..c994067 100644
--- a/src/vbox/vbox_tmpl.c
+++ b/src/vbox/vbox_tmpl.c
@@ -2212,7 +2212,6 @@ static char *vboxDomainGetXMLDesc(virDomainPtr dom, unsigned int flags) {
vboxIID iid = VBOX_IID_INITIALIZER;
int gotAllABoutDef = -1;
nsresult rc;
- char *tmp;
/* Flags checked by virDomainDefFormat */
@@ -2484,8 +2483,9 @@ static char *vboxDomainGetXMLDesc(virDomainPtr dom, unsigned int flags) {
}
} else if ((vrdpPresent != 1) && (totalPresent == 0) && (VIR_ALLOC_N(def->graphics, 1) >= 0)) {
if (VIR_ALLOC(def->graphics[def->ngraphics]) >= 0) {
+ const char *tmp;
def->graphics[def->ngraphics]->type = VIR_DOMAIN_GRAPHICS_TYPE_DESKTOP;
- tmp = getenv("DISPLAY");
+ tmp = virGetEnvBlockSUID("DISPLAY");
if (VIR_STRDUP(def->graphics[def->ngraphics]->data.desktop.display, tmp) < 0) {
/* just don't go to cleanup yet as it is ok to have
* display as NULL
diff --git a/tools/virsh.c b/tools/virsh.c
index 6842ed8..a76229a 100644
--- a/tools/virsh.c
+++ b/tools/virsh.c
@@ -233,7 +233,7 @@ virshErrorHandler(void *unused ATTRIBUTE_UNUSED, virErrorPtr error)
{
virFreeError(last_error);
last_error = virSaveLastError();
- if (getenv("VIRSH_DEBUG") != NULL)
+ if (virGetEnvAllowSUID("VIRSH_DEBUG") != NULL)
virDefaultErrorFunc(error);
}
@@ -670,7 +670,7 @@ vshEditWriteToTempFile(vshControl *ctl, const char *doc)
int fd;
char ebuf[1024];
- tmpdir = getenv("TMPDIR");
+ tmpdir = virGetEnvBlockSUID("TMPDIR");
if (!tmpdir) tmpdir = "/tmp";
if (virAsprintf(&ret, "%s/virshXXXXXX.xml", tmpdir) < 0) {
vshError(ctl, "%s", _("out of memory"));
@@ -717,9 +717,9 @@ vshEditFile(vshControl *ctl, const char *filename)
int outfd = STDOUT_FILENO;
int errfd = STDERR_FILENO;
- editor = getenv("VISUAL");
+ editor = virGetEnvBlockSUID("VISUAL");
if (!editor)
- editor = getenv("EDITOR");
+ editor = virGetEnvBlockSUID("EDITOR");
if (!editor)
editor = "vi"; /* could be cruel & default to ed(1) here */
@@ -2367,11 +2367,11 @@ vshEventLoop(void *opaque)
static void
vshInitDebug(vshControl *ctl)
{
- char *debugEnv;
+ const char *debugEnv;
if (ctl->debug == VSH_DEBUG_DEFAULT) {
/* log level not set from commandline, check env variable */
- debugEnv = getenv("VIRSH_DEBUG");
+ debugEnv = virGetEnvAllowSUID("VIRSH_DEBUG");
if (debugEnv) {
int debug;
if (virStrToLong_i(debugEnv, NULL, 10, &debug) < 0 ||
@@ -2386,7 +2386,7 @@ vshInitDebug(vshControl *ctl)
if (ctl->logfile == NULL) {
/* log file not set from cmdline */
- debugEnv = getenv("VIRSH_LOG_FILE");
+ debugEnv = virGetEnvBlockSUID("VIRSH_LOG_FILE");
if (debugEnv && *debugEnv) {
ctl->logfile = vshStrdup(ctl, debugEnv);
vshOpenLogFile(ctl);
@@ -3232,7 +3232,7 @@ int
main(int argc, char **argv)
{
vshControl _ctl, *ctl = &_ctl;
- char *defaultConn;
+ const char *defaultConn;
bool ret = true;
memset(ctl, 0, sizeof(vshControl));
@@ -3279,7 +3279,7 @@ main(int argc, char **argv)
else
progname++;
- if ((defaultConn = getenv("VIRSH_DEFAULT_CONNECT_URI"))) {
+ if ((defaultConn = virGetEnvBlockSUID("VIRSH_DEFAULT_CONNECT_URI"))) {
ctl->name = vshStrdup(ctl, defaultConn);
}
--
1.8.3.1
More information about the libvir-list
mailing list