File 8a3f8d95-CVE-2024-2494.patch of Package libvirt.33143
commit 8a3f8d957507c1f8223fdcf25a3ff885b15557f2
Author: Daniel P. Berrangé <berrange@redhat.com>
Date: Fri Mar 15 10:47:50 2024 +0000
remote: check for negative array lengths before allocation
While the C API entry points will validate non-negative lengths
for various parameters, the RPC server de-serialization code
will need to allocate memory for arrays before entering the C
API. These allocations will thus happen before the non-negative
length check is performed.
Passing a negative length to the g_new0 function will usually
result in a crash due to the negative length being treated as
a huge positive number.
This was found and diagnosed by ALT Linux Team with AFLplusplus.
CVE-2024-2494
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Found-by: Alexandr Shashkin <dutyrok@altlinux.org>
Co-developed-by: Alexander Kuznetsov <kuznetsovam@altlinux.org>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Index: libvirt-7.1.0/src/remote/remote_daemon_dispatch.c
===================================================================
--- libvirt-7.1.0.orig/src/remote/remote_daemon_dispatch.c
+++ libvirt-7.1.0/src/remote/remote_daemon_dispatch.c
@@ -2330,6 +2330,10 @@ remoteDispatchDomainGetSchedulerParamete
if (!conn)
goto cleanup;
+ if (args->nparams < 0) {
+ virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("nparams must be non-negative"));
+ goto cleanup;
+ }
if (args->nparams > REMOTE_DOMAIN_SCHEDULER_PARAMETERS_MAX) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("nparams too large"));
goto cleanup;
@@ -2378,6 +2382,10 @@ remoteDispatchDomainGetSchedulerParamete
if (!conn)
goto cleanup;
+ if (args->nparams < 0) {
+ virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("nparams must be non-negative"));
+ goto cleanup;
+ }
if (args->nparams > REMOTE_DOMAIN_SCHEDULER_PARAMETERS_MAX) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("nparams too large"));
goto cleanup;
@@ -2536,6 +2544,10 @@ remoteDispatchDomainBlockStatsFlags(virN
goto cleanup;
flags = args->flags;
+ if (args->nparams < 0) {
+ virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("nparams must be non-negative"));
+ goto cleanup;
+ }
if (args->nparams > REMOTE_DOMAIN_BLOCK_STATS_PARAMETERS_MAX) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("nparams too large"));
goto cleanup;
@@ -2764,6 +2776,14 @@ remoteDispatchDomainGetVcpuPinInfo(virNe
if (!(dom = get_nonnull_domain(conn, args->dom)))
goto cleanup;
+ if (args->ncpumaps < 0) {
+ virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("ncpumaps must be non-negative"));
+ goto cleanup;
+ }
+ if (args->maplen < 0) {
+ virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("maplen must be non-negative"));
+ goto cleanup;
+ }
if (args->ncpumaps > REMOTE_VCPUINFO_MAX) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("ncpumaps > REMOTE_VCPUINFO_MAX"));
goto cleanup;
@@ -2858,6 +2878,11 @@ remoteDispatchDomainGetEmulatorPinInfo(v
if (!(dom = get_nonnull_domain(conn, args->dom)))
goto cleanup;
+ if (args->maplen < 0) {
+ virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("maplen must be non-negative"));
+ goto cleanup;
+ }
+
/* Allocate buffers to take the results */
if (args->maplen > 0)
cpumaps = g_new0(unsigned char, args->maplen);
@@ -2905,6 +2930,14 @@ remoteDispatchDomainGetVcpus(virNetServe
if (!(dom = get_nonnull_domain(conn, args->dom)))
goto cleanup;
+ if (args->maxinfo < 0) {
+ virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("maxinfo must be non-negative"));
+ goto cleanup;
+ }
+ if (args->maplen < 0) {
+ virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("maxinfo must be non-negative"));
+ goto cleanup;
+ }
if (args->maxinfo > REMOTE_VCPUINFO_MAX) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("maxinfo > REMOTE_VCPUINFO_MAX"));
goto cleanup;
@@ -3145,6 +3178,10 @@ remoteDispatchDomainGetMemoryParameters(
flags = args->flags;
+ if (args->nparams < 0) {
+ virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("nparams must be non-negative"));
+ goto cleanup;
+ }
if (args->nparams > REMOTE_DOMAIN_MEMORY_PARAMETERS_MAX) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("nparams too large"));
goto cleanup;
@@ -3205,6 +3242,10 @@ remoteDispatchDomainGetNumaParameters(vi
flags = args->flags;
+ if (args->nparams < 0) {
+ virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("nparams must be non-negative"));
+ goto cleanup;
+ }
if (args->nparams > REMOTE_DOMAIN_NUMA_PARAMETERS_MAX) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("nparams too large"));
goto cleanup;
@@ -3265,6 +3306,10 @@ remoteDispatchDomainGetBlkioParameters(v
flags = args->flags;
+ if (args->nparams < 0) {
+ virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("nparams must be non-negative"));
+ goto cleanup;
+ }
if (args->nparams > REMOTE_DOMAIN_BLKIO_PARAMETERS_MAX) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("nparams too large"));
goto cleanup;
@@ -3326,6 +3371,10 @@ remoteDispatchNodeGetCPUStats(virNetServ
flags = args->flags;
+ if (args->nparams < 0) {
+ virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("nparams must be non-negative"));
+ goto cleanup;
+ }
if (args->nparams > REMOTE_NODE_CPU_STATS_MAX) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("nparams too large"));
goto cleanup;
@@ -3393,6 +3442,10 @@ remoteDispatchNodeGetMemoryStats(virNetS
flags = args->flags;
+ if (args->nparams < 0) {
+ virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("nparams must be non-negative"));
+ goto cleanup;
+ }
if (args->nparams > REMOTE_NODE_MEMORY_STATS_MAX) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("nparams too large"));
goto cleanup;
@@ -3573,6 +3626,10 @@ remoteDispatchDomainGetBlockIoTune(virNe
if (!conn)
goto cleanup;
+ if (args->nparams < 0) {
+ virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("nparams must be non-negative"));
+ goto cleanup;
+ }
if (args->nparams > REMOTE_DOMAIN_BLOCK_IO_TUNE_PARAMETERS_MAX) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("nparams too large"));
goto cleanup;
@@ -5117,6 +5174,10 @@ remoteDispatchDomainGetInterfaceParamete
flags = args->flags;
+ if (args->nparams < 0) {
+ virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("nparams must be non-negative"));
+ goto cleanup;
+ }
if (args->nparams > REMOTE_DOMAIN_INTERFACE_PARAMETERS_MAX) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("nparams too large"));
goto cleanup;
@@ -5337,6 +5398,10 @@ remoteDispatchNodeGetMemoryParameters(vi
flags = args->flags;
+ if (args->nparams < 0) {
+ virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("nparams must be non-negative"));
+ goto cleanup;
+ }
if (args->nparams > REMOTE_NODE_MEMORY_PARAMETERS_MAX) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("nparams too large"));
goto cleanup;
Index: libvirt-7.1.0/src/rpc/gendispatch.pl
===================================================================
--- libvirt-7.1.0.orig/src/rpc/gendispatch.pl
+++ libvirt-7.1.0/src/rpc/gendispatch.pl
@@ -1073,6 +1073,11 @@ elsif ($mode eq "server") {
print "\n";
if ($single_ret_as_list) {
+ print " if (args->$single_ret_list_max_var < 0) {\n";
+ print " virReportError(VIR_ERR_RPC,\n";
+ print " \"%s\", _(\"max$single_ret_list_name must be non-negative\"));\n";
+ print " goto cleanup;\n";
+ print " }\n";
print " if (args->$single_ret_list_max_var > $single_ret_list_max_define) {\n";
print " virReportError(VIR_ERR_RPC,\n";
print " \"%s\", _(\"max$single_ret_list_name > $single_ret_list_max_define\"));\n";
