From: Igor Ustinov <igus68@gmail.com>
Date: Mon, 12 Jan 2026 11:19:59 +0000 (+0100)
Subject: Correct handling of AEAD-encrypted CMS with inadmissibly long IV
X-Git-Tag: openssl-3.0.19~11
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ce39170276daec87f55c39dad1f629b56344429e;p=thirdparty%2Fopenssl.git

Correct handling of AEAD-encrypted CMS with inadmissibly long IV

Fixes CVE-2025-15467

Reviewed-by: Norbert Pocs <norbertp@openssl.org>
Reviewed-by: Eugene Syromiatnikov <esyr@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
MergeDate: Mon Jan 26 19:34:29 2026
---

diff --git a/crypto/evp/evp_lib.c b/crypto/evp/evp_lib.c
index bee4e62dea2..72f374c81a6 100644
--- a/crypto/evp/evp_lib.c
+++ b/crypto/evp/evp_lib.c
@@ -249,10 +249,9 @@ int evp_cipher_get_asn1_aead_params(EVP_CIPHER_CTX *c, ASN1_TYPE *type,
     if (type == NULL || asn1_params == NULL)
         return 0;
 
-    i = ossl_asn1_type_get_octetstring_int(type, &tl, NULL, EVP_MAX_IV_LENGTH);
-    if (i <= 0)
+    i = ossl_asn1_type_get_octetstring_int(type, &tl, iv, EVP_MAX_IV_LENGTH);
+    if (i <= 0 || i > EVP_MAX_IV_LENGTH)
         return -1;
-    ossl_asn1_type_get_octetstring_int(type, &tl, iv, i);
 
     memcpy(asn1_params->iv, iv, i);
     asn1_params->iv_len = i;