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openssl/0128-CVE-2023-5363.patch
Dmitry Belyavskiy 66dddb942c Fix incorrect cipher key and IV length processing (CVE-2023-5363) 
Resolves: RHEL-13251
2023-10-25 12:08:21 +02:00

319 lines
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diff --git a/crypto/evp/evp_enc.c b/crypto/evp/evp_enc.c
index d2ed3fd378..6a819590e6 100644
--- a/crypto/evp/evp_enc.c
+++ b/crypto/evp/evp_enc.c
@@ -223,6 +223,42 @@ static int evp_cipher_init_internal(EVP_CIPHER_CTX *ctx,
return 0;
}
+#ifndef FIPS_MODULE
+ /*
+ * Fix for CVE-2023-5363
+ * Passing in a size as part of the init call takes effect late
+ * so, force such to occur before the initialisation.
+ *
+ * The FIPS provider's internal library context is used in a manner
+ * such that this is not an issue.
+ */
+ if (params != NULL) {
+ OSSL_PARAM param_lens[3] = { OSSL_PARAM_END, OSSL_PARAM_END,
+ OSSL_PARAM_END };
+ OSSL_PARAM *q = param_lens;
+ const OSSL_PARAM *p;
+
+ p = OSSL_PARAM_locate_const(params, OSSL_CIPHER_PARAM_KEYLEN);
+ if (p != NULL)
+ memcpy(q++, p, sizeof(*q));
+
+ /*
+ * Note that OSSL_CIPHER_PARAM_AEAD_IVLEN is a synomym for
+ * OSSL_CIPHER_PARAM_IVLEN so both are covered here.
+ */
+ p = OSSL_PARAM_locate_const(params, OSSL_CIPHER_PARAM_IVLEN);
+ if (p != NULL)
+ memcpy(q++, p, sizeof(*q));
+
+ if (q != param_lens) {
+ if (!EVP_CIPHER_CTX_set_params(ctx, param_lens)) {
+ ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_LENGTH);
+ return 0;
+ }
+ }
+ }
+#endif
+
if (enc) {
if (ctx->cipher->einit == NULL) {
ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
diff --git a/test/evp_extra_test.c b/test/evp_extra_test.c
index cfffa21350..2318bf6a68 100644
--- a/test/evp_extra_test.c
+++ b/test/evp_extra_test.c
@@ -4851,6 +4851,253 @@ static int test_ecx_not_private_key(int tst)
return options;
}
+static int aes_gcm_encrypt(const unsigned char *gcm_key, size_t gcm_key_s,
+ const unsigned char *gcm_iv, size_t gcm_ivlen,
+ const unsigned char *gcm_pt, size_t gcm_pt_s,
+ const unsigned char *gcm_aad, size_t gcm_aad_s,
+ const unsigned char *gcm_ct, size_t gcm_ct_s,
+ const unsigned char *gcm_tag, size_t gcm_tag_s)
+{
+ int ret = 0;
+ EVP_CIPHER_CTX *ctx;
+ EVP_CIPHER *cipher = NULL;
+ int outlen, tmplen;
+ unsigned char outbuf[1024];
+ unsigned char outtag[16];
+ OSSL_PARAM params[2] = {
+ OSSL_PARAM_END, OSSL_PARAM_END
+ };
+
+ if (!TEST_ptr(ctx = EVP_CIPHER_CTX_new())
+ || !TEST_ptr(cipher = EVP_CIPHER_fetch(testctx, "AES-256-GCM", "")))
+ goto err;
+
+ params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_AEAD_IVLEN,
+ &gcm_ivlen);
+
+ if (!TEST_true(EVP_EncryptInit_ex2(ctx, cipher, gcm_key, gcm_iv, params))
+ || (gcm_aad != NULL
+ && !TEST_true(EVP_EncryptUpdate(ctx, NULL, &outlen,
+ gcm_aad, gcm_aad_s)))
+ || !TEST_true(EVP_EncryptUpdate(ctx, outbuf, &outlen,
+ gcm_pt, gcm_pt_s))
+ || !TEST_true(EVP_EncryptFinal_ex(ctx, outbuf, &tmplen)))
+ goto err;
+
+ params[0] = OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_TAG,
+ outtag, sizeof(outtag));
+
+ if (!TEST_true(EVP_CIPHER_CTX_get_params(ctx, params))
+ || !TEST_mem_eq(outbuf, outlen, gcm_ct, gcm_ct_s)
+ || !TEST_mem_eq(outtag, gcm_tag_s, gcm_tag, gcm_tag_s))
+ goto err;
+
+ ret = 1;
+err:
+ EVP_CIPHER_free(cipher);
+ EVP_CIPHER_CTX_free(ctx);
+
+ return ret;
+}
+
+static int aes_gcm_decrypt(const unsigned char *gcm_key, size_t gcm_key_s,
+ const unsigned char *gcm_iv, size_t gcm_ivlen,
+ const unsigned char *gcm_pt, size_t gcm_pt_s,
+ const unsigned char *gcm_aad, size_t gcm_aad_s,
+ const unsigned char *gcm_ct, size_t gcm_ct_s,
+ const unsigned char *gcm_tag, size_t gcm_tag_s)
+{
+ int ret = 0;
+ EVP_CIPHER_CTX *ctx;
+ EVP_CIPHER *cipher = NULL;
+ int outlen;
+ unsigned char outbuf[1024];
+ OSSL_PARAM params[2] = {
+ OSSL_PARAM_END, OSSL_PARAM_END
+ };
+
+ if ((ctx = EVP_CIPHER_CTX_new()) == NULL)
+ goto err;
+
+ if ((cipher = EVP_CIPHER_fetch(testctx, "AES-256-GCM", "")) == NULL)
+ goto err;
+
+ params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_AEAD_IVLEN,
+ &gcm_ivlen);
+
+ if (!TEST_true(EVP_DecryptInit_ex2(ctx, cipher, gcm_key, gcm_iv, params))
+ || (gcm_aad != NULL
+ && !TEST_true(EVP_DecryptUpdate(ctx, NULL, &outlen,
+ gcm_aad, gcm_aad_s)))
+ || !TEST_true(EVP_DecryptUpdate(ctx, outbuf, &outlen,
+ gcm_ct, gcm_ct_s))
+ || !TEST_mem_eq(outbuf, outlen, gcm_pt, gcm_pt_s))
+ goto err;
+
+ params[0] = OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_TAG,
+ (void*)gcm_tag, gcm_tag_s);
+
+ if (!TEST_true(EVP_CIPHER_CTX_set_params(ctx, params))
+ ||!TEST_true(EVP_DecryptFinal_ex(ctx, outbuf, &outlen)))
+ goto err;
+
+ ret = 1;
+err:
+ EVP_CIPHER_free(cipher);
+ EVP_CIPHER_CTX_free(ctx);
+
+ return ret;
+}
+
+static int test_aes_gcm_ivlen_change_cve_2023_5363(void)
+{
+ /* AES-GCM test data obtained from NIST public test vectors */
+ static const unsigned char gcm_key[] = {
+ 0xd0, 0xc2, 0x67, 0xc1, 0x9f, 0x30, 0xd8, 0x0b, 0x89, 0x14, 0xbb, 0xbf,
+ 0xb7, 0x2f, 0x73, 0xb8, 0xd3, 0xcd, 0x5f, 0x6a, 0x78, 0x70, 0x15, 0x84,
+ 0x8a, 0x7b, 0x30, 0xe3, 0x8f, 0x16, 0xf1, 0x8b,
+ };
+ static const unsigned char gcm_iv[] = {
+ 0xb6, 0xdc, 0xda, 0x95, 0xac, 0x99, 0x77, 0x76, 0x25, 0xae, 0x87, 0xf8,
+ 0xa3, 0xa9, 0xdd, 0x64, 0xd7, 0x9b, 0xbd, 0x5f, 0x4a, 0x0e, 0x54, 0xca,
+ 0x1a, 0x9f, 0xa2, 0xe3, 0xf4, 0x5f, 0x5f, 0xc2, 0xce, 0xa7, 0xb6, 0x14,
+ 0x12, 0x6f, 0xf0, 0xaf, 0xfd, 0x3e, 0x17, 0x35, 0x6e, 0xa0, 0x16, 0x09,
+ 0xdd, 0xa1, 0x3f, 0xd8, 0xdd, 0xf3, 0xdf, 0x4f, 0xcb, 0x18, 0x49, 0xb8,
+ 0xb3, 0x69, 0x2c, 0x5d, 0x4f, 0xad, 0x30, 0x91, 0x08, 0xbc, 0xbe, 0x24,
+ 0x01, 0x0f, 0xbe, 0x9c, 0xfb, 0x4f, 0x5d, 0x19, 0x7f, 0x4c, 0x53, 0xb0,
+ 0x95, 0x90, 0xac, 0x7b, 0x1f, 0x7b, 0xa0, 0x99, 0xe1, 0xf3, 0x48, 0x54,
+ 0xd0, 0xfc, 0xa9, 0xcc, 0x91, 0xf8, 0x1f, 0x9b, 0x6c, 0x9a, 0xe0, 0xdc,
+ 0x63, 0xea, 0x7d, 0x2a, 0x4a, 0x7d, 0xa5, 0xed, 0x68, 0x57, 0x27, 0x6b,
+ 0x68, 0xe0, 0xf2, 0xb8, 0x51, 0x50, 0x8d, 0x3d,
+ };
+ static const unsigned char gcm_pt[] = {
+ 0xb8, 0xb6, 0x88, 0x36, 0x44, 0xe2, 0x34, 0xdf, 0x24, 0x32, 0x91, 0x07,
+ 0x4f, 0xe3, 0x6f, 0x81,
+ };
+ static const unsigned char gcm_ct[] = {
+ 0xff, 0x4f, 0xb3, 0xf3, 0xf9, 0xa2, 0x51, 0xd4, 0x82, 0xc2, 0xbe, 0xf3,
+ 0xe2, 0xd0, 0xec, 0xed,
+ };
+ static const unsigned char gcm_tag[] = {
+ 0xbd, 0x06, 0x38, 0x09, 0xf7, 0xe1, 0xc4, 0x72, 0x0e, 0xf2, 0xea, 0x63,
+ 0xdb, 0x99, 0x6c, 0x21,
+ };
+
+ return aes_gcm_encrypt(gcm_key, sizeof(gcm_key), gcm_iv, sizeof(gcm_iv),
+ gcm_pt, sizeof(gcm_pt), NULL, 0,
+ gcm_ct, sizeof(gcm_ct), gcm_tag, sizeof(gcm_tag))
+ && aes_gcm_decrypt(gcm_key, sizeof(gcm_key), gcm_iv, sizeof(gcm_iv),
+ gcm_pt, sizeof(gcm_pt), NULL, 0,
+ gcm_ct, sizeof(gcm_ct), gcm_tag, sizeof(gcm_tag));
+}
+
+#ifndef OPENSSL_NO_RC4
+static int rc4_encrypt(const unsigned char *rc4_key, size_t rc4_key_s,
+ const unsigned char *rc4_pt, size_t rc4_pt_s,
+ const unsigned char *rc4_ct, size_t rc4_ct_s)
+{
+ int ret = 0;
+ EVP_CIPHER_CTX *ctx;
+ EVP_CIPHER *cipher = NULL;
+ int outlen, tmplen;
+ unsigned char outbuf[1024];
+ OSSL_PARAM params[2] = {
+ OSSL_PARAM_END, OSSL_PARAM_END
+ };
+
+ if (!TEST_ptr(ctx = EVP_CIPHER_CTX_new())
+ || !TEST_ptr(cipher = EVP_CIPHER_fetch(testctx, "RC4", "")))
+ goto err;
+
+ params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_KEYLEN,
+ &rc4_key_s);
+
+ if (!TEST_true(EVP_EncryptInit_ex2(ctx, cipher, rc4_key, NULL, params))
+ || !TEST_true(EVP_EncryptUpdate(ctx, outbuf, &outlen,
+ rc4_pt, rc4_pt_s))
+ || !TEST_true(EVP_EncryptFinal_ex(ctx, outbuf, &tmplen)))
+ goto err;
+
+ if (!TEST_mem_eq(outbuf, outlen, rc4_ct, rc4_ct_s))
+ goto err;
+
+ ret = 1;
+err:
+ EVP_CIPHER_free(cipher);
+ EVP_CIPHER_CTX_free(ctx);
+
+ return ret;
+}
+
+static int rc4_decrypt(const unsigned char *rc4_key, size_t rc4_key_s,
+ const unsigned char *rc4_pt, size_t rc4_pt_s,
+ const unsigned char *rc4_ct, size_t rc4_ct_s)
+{
+ int ret = 0;
+ EVP_CIPHER_CTX *ctx;
+ EVP_CIPHER *cipher = NULL;
+ int outlen;
+ unsigned char outbuf[1024];
+ OSSL_PARAM params[2] = {
+ OSSL_PARAM_END, OSSL_PARAM_END
+ };
+
+ if ((ctx = EVP_CIPHER_CTX_new()) == NULL)
+ goto err;
+
+ if ((cipher = EVP_CIPHER_fetch(testctx, "RC4", "")) == NULL)
+ goto err;
+
+ params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_KEYLEN,
+ &rc4_key_s);
+
+ if (!TEST_true(EVP_DecryptInit_ex2(ctx, cipher, rc4_key, NULL, params))
+ || !TEST_true(EVP_DecryptUpdate(ctx, outbuf, &outlen,
+ rc4_ct, rc4_ct_s))
+ || !TEST_mem_eq(outbuf, outlen, rc4_pt, rc4_pt_s))
+ goto err;
+
+ ret = 1;
+err:
+ EVP_CIPHER_free(cipher);
+ EVP_CIPHER_CTX_free(ctx);
+
+ return ret;
+}
+
+static int test_aes_rc4_keylen_change_cve_2023_5363(void)
+{
+ /* RC4 test data obtained from RFC 6229 */
+ static const struct {
+ unsigned char key[5];
+ unsigned char padding[11];
+ } rc4_key = {
+ { /* Five bytes of key material */
+ 0x83, 0x32, 0x22, 0x77, 0x2a,
+ },
+ { /* Random padding to 16 bytes */
+ 0x80, 0xad, 0x97, 0xbd, 0xc9, 0x73, 0xdf, 0x8a, 0xaa, 0x32, 0x91
+ }
+ };
+ static const unsigned char rc4_pt[] = {
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
+ };
+ static const unsigned char rc4_ct[] = {
+ 0x80, 0xad, 0x97, 0xbd, 0xc9, 0x73, 0xdf, 0x8a,
+ 0x2e, 0x87, 0x9e, 0x92, 0xa4, 0x97, 0xef, 0xda
+ };
+
+ if (lgcyprov == NULL)
+ return TEST_skip("Test requires legacy provider to be loaded");
+
+ return rc4_encrypt(rc4_key.key, sizeof(rc4_key.key),
+ rc4_pt, sizeof(rc4_pt), rc4_ct, sizeof(rc4_ct))
+ && rc4_decrypt(rc4_key.key, sizeof(rc4_key.key),
+ rc4_pt, sizeof(rc4_pt), rc4_ct, sizeof(rc4_ct));
+}
+#endif
+
int setup_tests(void)
{
OPTION_CHOICE o;
@@ -4994,6 +5241,12 @@ int setup_tests(void)
ADD_ALL_TESTS(test_ecx_short_keys, OSSL_NELEM(ecxnids));
+ /* Test cases for CVE-2023-5363 */
+ ADD_TEST(test_aes_gcm_ivlen_change_cve_2023_5363);
+#ifndef OPENSSL_NO_RC4
+ ADD_TEST(test_aes_rc4_keylen_change_cve_2023_5363);
+#endif
+
return 1;
}
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