1f87a4d9fe
Resolves: rhbz#1966606: CVE-2021-28091 lasso: XML signature wrapping vulnerability when parsing SAML responses
60 lines
2.0 KiB
Diff
60 lines
2.0 KiB
Diff
From 20f653f70818b85fe1b4de77a629fce352fb8cbd Mon Sep 17 00:00:00 2001
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From: Jakub Hrozek <jhrozek@redhat.com>
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Date: Mon, 26 Jul 2021 16:25:52 +0200
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Subject: [PATCH] lasso_saml20_login_process_response_status_and_assertion:
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handle rc as per verify_hint
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In case VERIFY_HINT was set to IGNORE and the login signature was
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incorrect, lasso_saml20_login_process_response_status_and_assertion
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would have jumped straight to the cleanup label which just returns the
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return code. Let's jump to a new label handlerc instead which might set
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the return code to 0 in case verify_hint is set to IGNORE.
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Related: https://dev.entrouvert.org/issues/54689
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---
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lasso/saml-2.0/login.c | 20 ++++++--------------
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1 file changed, 6 insertions(+), 14 deletions(-)
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diff --git a/lasso/saml-2.0/login.c b/lasso/saml-2.0/login.c
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index cf62c1cc9..1d5668b5b 100644
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--- a/lasso/saml-2.0/login.c
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+++ b/lasso/saml-2.0/login.c
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@@ -1371,7 +1371,7 @@ lasso_saml20_login_process_response_status_and_assertion(LassoLogin *login)
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char *status_value;
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lasso_error_t rc = 0;
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lasso_error_t assertion_signature_status = 0;
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- LassoProfileSignatureVerifyHint verify_hint;
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+ LassoProfileSignatureVerifyHint verify_hint = LASSO_PROFILE_SIGNATURE_VERIFY_HINT_LAST;
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profile = &login->parent;
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lasso_extract_node_or_fail(response, profile->response, SAMLP2_STATUS_RESPONSE,
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@@ -1492,20 +1492,12 @@ lasso_saml20_login_process_response_status_and_assertion(LassoLogin *login)
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lasso_assign_gobject (login->private_data->saml2_assertion, last_assertion);
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}
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- switch (verify_hint) {
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- case LASSO_PROFILE_SIGNATURE_VERIFY_HINT_FORCE:
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- case LASSO_PROFILE_SIGNATURE_VERIFY_HINT_MAYBE:
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- break;
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- case LASSO_PROFILE_SIGNATURE_VERIFY_HINT_IGNORE:
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- /* ignore signature errors */
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- if (rc == LASSO_PROFILE_ERROR_CANNOT_VERIFY_SIGNATURE) {
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- rc = 0;
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- }
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- break;
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- default:
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- g_assert(0);
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- }
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cleanup:
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+ if (verify_hint == LASSO_PROFILE_SIGNATURE_VERIFY_HINT_IGNORE &&
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+ rc == LASSO_PROFILE_ERROR_CANNOT_VERIFY_SIGNATURE) {
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+ profile->signature_status = rc;
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+ rc = 0;
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+ }
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return rc;
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}
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--
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2.26.3
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