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From 7f3cced1e140ed36c6f8f66d7f4098323b0463b2 Mon Sep 17 00:00:00 2001
From: Katy Feng <fkaty@vmware.com>
Date: Fri, 25 Aug 2023 11:58:48 -0700
Subject: [PATCH] Allow only X509 certs to verify the SAML token signature.
Upstream-Status: Backport from https://github.com/vmware/open-vm-tools/commit/74b6d0d9000eda1a2c8f31c40c725fb0b8520b16
CVE: CVE-2023-20900
Signed-off-by: Priyal Doshi <pdoshi@mvista.com>
---
open-vm-tools/vgauth/serviceImpl/saml-xmlsec1.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/open-vm-tools/vgauth/serviceImpl/saml-xmlsec1.c b/open-vm-tools/vgauth/serviceImpl/saml-xmlsec1.c
index 2906d29..57db3b8 100644
--- a/open-vm-tools/vgauth/serviceImpl/saml-xmlsec1.c
+++ b/open-vm-tools/vgauth/serviceImpl/saml-xmlsec1.c
@@ -1275,7 +1275,14 @@ VerifySignature(xmlDocPtr doc,
*/
bRet = RegisterID(xmlDocGetRootElement(doc), "ID");
if (bRet == FALSE) {
- g_warning("failed to register ID\n");
+ g_warning("Failed to register ID\n");
+ goto done;
+ }
+
+ /* Use only X509 certs to validate the signature */
+ if (xmlSecPtrListAdd(&(dsigCtx->keyInfoReadCtx.enabledKeyData),
+ BAD_CAST xmlSecKeyDataX509Id) < 0) {
+ g_warning("Failed to limit allowed key data\n");
goto done;
}
--
2.7.4
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