[libvirt] [PATCH 2/4] api: disallow virDomainManagedSaveDefineXML on read-only connections

[Ján Tomko]

The virDomainManagedSaveDefineXML can be used to alter the domain's
config used for managedsave or even execute arbitrary emulator binaries.
Forbid it on read-only connections.

Fixes: CVE-2019-10166
Reported-by: Matthias Gerstner <mgerstner at suse.de>
Signed-off-by: Ján Tomko <jtomko at redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange at redhat.com>
---
 src/libvirt-domain.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/libvirt-domain.c b/src/libvirt-domain.c
index b15726caa9..6355f497ce 100644
--- a/src/libvirt-domain.c
+++ b/src/libvirt-domain.c
@@ -9570,6 +9570,7 @@ virDomainManagedSaveDefineXML(virDomainPtr domain, const char *dxml,
 
     virCheckDomainReturn(domain, -1);
     conn = domain->conn;
+    virCheckReadOnlyGoto(conn->flags, error);
 
     if (conn->driver->domainManagedSaveDefineXML) {
         int ret;
-- 
2.20.1