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From d5b7ada5278e175d3174a6bcdc4338684ae4376e Mon Sep 17 00:00:00 2001
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Message-Id: <d5b7ada5278e175d3174a6bcdc4338684ae4376e@dist-git>
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From: =?UTF-8?q?J=C3=A1n=20Tomko?= <jtomko@redhat.com>
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Date: Tue, 18 Jun 2019 13:29:59 +0200
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Subject: [PATCH] api: disallow virDomainSaveImageGetXMLDesc on read-only
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connections
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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The virDomainSaveImageGetXMLDesc API is taking a path parameter,
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which can point to any path on the system. This file will then be
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read and parsed by libvirtd running with root privileges.
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Forbid it on read-only connections.
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Fixes: CVE-2019-10161
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Reported-by: Matthias Gerstner <mgerstner@suse.de>
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Signed-off-by: Ján Tomko <jtomko@redhat.com>
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Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
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Signed-off-by: Ján Tomko <jtomko@redhat.com>
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Conflicts:
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src/libvirt-domain.c
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src/remote/remote_protocol.x
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Upstream commit 12a51f372 which introduced the VIR_DOMAIN_SAVE_IMAGE_XML_SECURE
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alias for VIR_DOMAIN_XML_SECURE is not backported.
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Just skip the commit since we now disallow the whole API on read-only
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connections, regardless of the flag.
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Message-Id: <4c14d609cd7b548459b9ef2f59728fa5c5e38268.1560857354.git.jtomko@redhat.com>
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Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
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---
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src/libvirt-domain.c | 11 ++---------
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src/qemu/qemu_driver.c | 2 +-
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src/remote/remote_protocol.x | 3 +--
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3 files changed, 4 insertions(+), 12 deletions(-)
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diff --git a/src/libvirt-domain.c b/src/libvirt-domain.c
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index ad0ded9ee3..0ba85b9360 100644
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--- a/src/libvirt-domain.c
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+++ b/src/libvirt-domain.c
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@@ -1073,9 +1073,7 @@ virDomainRestoreFlags(virConnectPtr conn, const char *from, const char *dxml,
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* previously by virDomainSave() or virDomainSaveFlags().
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*
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* No security-sensitive data will be included unless @flags contains
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- * VIR_DOMAIN_XML_SECURE; this flag is rejected on read-only
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- * connections. For this API, @flags should not contain either
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- * VIR_DOMAIN_XML_INACTIVE or VIR_DOMAIN_XML_UPDATE_CPU.
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+ * VIR_DOMAIN_XML_SECURE.
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*
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* Returns a 0 terminated UTF-8 encoded XML instance, or NULL in case of
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* error. The caller must free() the returned value.
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@@ -1091,12 +1089,7 @@ virDomainSaveImageGetXMLDesc(virConnectPtr conn, const char *file,
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virCheckConnectReturn(conn, NULL);
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virCheckNonNullArgGoto(file, error);
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-
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- if ((conn->flags & VIR_CONNECT_RO) && (flags & VIR_DOMAIN_XML_SECURE)) {
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- virReportError(VIR_ERR_OPERATION_DENIED, "%s",
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- _("virDomainSaveImageGetXMLDesc with secure flag"));
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- goto error;
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- }
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+ virCheckReadOnlyGoto(conn->flags, error);
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if (conn->driver->domainSaveImageGetXMLDesc) {
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char *ret;
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diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
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index 88c08f88ee..2da87992fd 100644
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--- a/src/qemu/qemu_driver.c
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+++ b/src/qemu/qemu_driver.c
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@@ -6786,7 +6786,7 @@ qemuDomainSaveImageGetXMLDesc(virConnectPtr conn, const char *path,
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if (fd < 0)
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goto cleanup;
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- if (virDomainSaveImageGetXMLDescEnsureACL(conn, def, flags) < 0)
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+ if (virDomainSaveImageGetXMLDescEnsureACL(conn, def) < 0)
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goto cleanup;
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ret = qemuDomainDefFormatXML(driver, def, flags);
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diff --git a/src/remote/remote_protocol.x b/src/remote/remote_protocol.x
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index 28c8febabd..52b92334fa 100644
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--- a/src/remote/remote_protocol.x
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+++ b/src/remote/remote_protocol.x
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@@ -5226,8 +5226,7 @@ enum remote_procedure {
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/**
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* @generate: both
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* @priority: high
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- * @acl: domain:read
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- * @acl: domain:read_secure:VIR_DOMAIN_XML_SECURE
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+ * @acl: domain:write
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*/
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REMOTE_PROC_DOMAIN_SAVE_IMAGE_GET_XML_DESC = 235,
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--
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2.22.0
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