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30 lines
1.0 KiB
30 lines
1.0 KiB
2 years ago
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From 3f9deff30ae6efbfe979043b00cdf649b39793c0 Mon Sep 17 00:00:00 2001
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From: Tomas Mraz <tmraz@fedoraproject.org>
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Date: Thu, 24 Sep 2020 09:51:34 +0200
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Subject: Disable signature verification with totally unsafe hash algorithms
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(was openssl-1.1.1-no-weak-verify.patch)
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---
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crypto/asn1/a_verify.c | 5 +++++
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1 file changed, 5 insertions(+)
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diff --git a/crypto/asn1/a_verify.c b/crypto/asn1/a_verify.c
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index b7eed914b0..af62f0ef08 100644
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--- a/crypto/asn1/a_verify.c
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+++ b/crypto/asn1/a_verify.c
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@@ -152,6 +152,11 @@ int ASN1_item_verify_ctx(const ASN1_ITEM *it, const X509_ALGOR *alg,
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ERR_raise(ERR_LIB_ASN1, ERR_R_EVP_LIB);
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if (ret <= 1)
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goto err;
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+ } else if ((mdnid == NID_md5
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+ && ossl_safe_getenv("OPENSSL_ENABLE_MD5_VERIFY") == NULL) ||
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+ mdnid == NID_md4 || mdnid == NID_md2 || mdnid == NID_sha) {
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+ ERR_raise(ERR_LIB_ASN1, ASN1_R_UNKNOWN_MESSAGE_DIGEST_ALGORITHM);
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+ goto err;
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} else {
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const EVP_MD *type = NULL;
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--
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2.26.2
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