[PATCH 3/4] api: disallow virConnectGetDomainCapabilities on read-only connections

[Ján Tomko <jtomko@xxxxxxxxxx>]

This API can be used to execute arbitrary emulators.
Forbid it on read-only connections.

Fixes: CVE-2019-10167
Signed-off-by: Ján Tomko <jtomko@xxxxxxxxxx>
Reviewed-by: Daniel P. Berrangé <berrange@xxxxxxxxxx>
---
 src/libvirt-domain.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/libvirt-domain.c b/src/libvirt-domain.c
index 6355f497ce..50767a75ed 100644
--- a/src/libvirt-domain.c
+++ b/src/libvirt-domain.c
@@ -11367,6 +11367,7 @@ virConnectGetDomainCapabilities(virConnectPtr conn,
     virResetLastError();
 
     virCheckConnectReturn(conn, NULL);
+    virCheckReadOnlyGoto(conn->flags, error);
 
     if (conn->driver->connectGetDomainCapabilities) {
         char *ret;
-- 
2.20.1

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