Fix Memory corruption in openssl_encrypt with AES-WRAP-PADHEADmaster

1 files changed, 123 insertions, 0 deletions

diff --git a/php-gh22187.patch b/php-gh22187.patch
new file mode 100644
index 0000000..f90a801
--- /dev/null
+++ b/php-gh22187.patch
@@ -0,0 +1,123 @@
+From 5c2cc46b45cf286666671df14edf25fc23676cd8 Mon Sep 17 00:00:00 2001
+From: David Carlier <devnexen@gmail.com>
+Date: Fri, 29 May 2026 21:44:14 +0100
+Subject: [PATCH] ext/openssl: openssl_encrypt() zend mm heap overflow on
+ AES-WRAP-PAD mode.
+
+Fix #22186
+
+close GH-22187
+
+(cherry picked from commit cbc0489126a7682796aad1e5fb4e51de74af162c)
+(cherry picked from commit 95e9851111d249e43948b76663cff1baeb5e758d)
+(cherry picked from commit 2a73e91a9f9136fbbfcc9177573b6af71e3d5dce)
+(cherry picked from commit e058b01e1bd23421a425cffae9f458b0fa8db222)
+(cherry picked from commit 09cccab30d53614bb826e4390ad23ad7451b6d6c)
+(cherry picked from commit f15d1e26160a8175474160907eb6ab7e10090fa0)
+(cherry picked from commit 58c39c2f8402261fd4e8ffd327c37adc53a9c861)
+(cherry picked from commit 4eeb25a7ae8f91e517b760423b50a5a5ef9e98fb)
+---
+ NEWS                           |  6 ++++++
+ ext/openssl/openssl.c          | 22 ++++++++++++++++++++++
+ ext/openssl/tests/gh22186.phpt | 32 ++++++++++++++++++++++++++++++++
+ 3 files changed, 60 insertions(+)
+ create mode 100644 ext/openssl/tests/gh22186.phpt
+
+diff --git a/NEWS b/NEWS
+index d8ae595068..1f7e3dfd8c 100644
+--- a/NEWS
++++ b/NEWS
+@@ -1,6 +1,12 @@
+ PHP                                                                        NEWS
+ |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
+ 
++Backported from 8.2.32
++
++- OpenSSL:
++  . Fixed bug GH-22187 (Memory corruption (zend_mm_heap corrupted) in
++    openssl_encrypt with AES-WRAP-PAD). (David Carlier)
++
+ Backported from 8.2.31
+ 
+ - FPM:
+diff --git a/ext/openssl/openssl.c b/ext/openssl/openssl.c
+index eda68f2ff1..b6a79249b0 100644
+--- a/ext/openssl/openssl.c
++++ b/ext/openssl/openssl.c
+@@ -5422,6 +5422,17 @@ PHP_FUNCTION(openssl_encrypt)
+ 	free_iv = php_openssl_validate_iv(&iv, &iv_len, max_iv_len TSRMLS_CC);
+ 
+ 	outlen = data_len + EVP_CIPHER_block_size(cipher_type);
++#ifdef EVP_CIPH_WRAP_MODE
++	if ((EVP_CIPHER_mode(cipher_type)) == EVP_CIPH_WRAP_MODE) {
++		/*
++		 * RFC 5649 wrap-with-padding rounds the input up to the block size
++		 * and prepends an integrity block, we reserve one extra block.
++		 * See EVP_EncryptUpdate(3): wrap mode may write up to
++		 * inl + cipher_block_size bytes.
++		 */
++		outlen += EVP_CIPHER_block_size(cipher_type);
++	}
++#endif
+ 	outbuf = safe_emalloc(outlen, 1, 1);
+ 
+ 	EVP_EncryptInit(cipher_ctx, cipher_type, NULL, NULL);
+@@ -5526,6 +5537,17 @@ PHP_FUNCTION(openssl_decrypt)
+ 	free_iv = php_openssl_validate_iv(&iv, &iv_len, EVP_CIPHER_iv_length(cipher_type) TSRMLS_CC);
+ 
+ 	outlen = data_len + EVP_CIPHER_block_size(cipher_type);
++#ifdef EVP_CIPH_WRAP_MODE
++	if ((EVP_CIPHER_mode(cipher_type)) == EVP_CIPH_WRAP_MODE) {
++		/*
++		 * RFC 5649 wrap-with-padding rounds the input up to the block size
++		 * and prepends an integrity block, we reserve one extra block.
++		 * See EVP_EncryptUpdate(3): wrap mode may write up to
++		 * inl + cipher_block_size bytes.
++		 */
++		outlen += EVP_CIPHER_block_size(cipher_type);
++	}
++#endif
+ 	outbuf = emalloc(outlen + 1);
+ 
+ 	EVP_DecryptInit(cipher_ctx, cipher_type, NULL, NULL);
+diff --git a/ext/openssl/tests/gh22186.phpt b/ext/openssl/tests/gh22186.phpt
+new file mode 100644
+index 0000000000..8f28e6c45b
+--- /dev/null
++++ b/ext/openssl/tests/gh22186.phpt
+@@ -0,0 +1,32 @@
++--TEST--
++GH-22186 (Heap buffer overflow in openssl_encrypt with AES-WRAP-PAD)
++--EXTENSIONS--
++openssl
++--SKIPIF--
++<?php
++/* openssl_get_cipher_methods() enumerates provider ciphers, but openssl_encrypt()
++ * resolves names via the legacy EVP_get_cipherbyname(), so on some builds the
++ * cipher is listed yet not usable. Probe the actual call path instead. */
++if (!@openssl_encrypt("test", "aes-128-wrap-pad", str_repeat("k", 16),
++        OPENSSL_RAW_DATA | OPENSSL_DONT_ZERO_PAD_KEY, str_repeat("\0", 4))) {
++    die('skip aes-128-wrap-pad not usable on this OpenSSL build');
++}
++?>
++--FILE--
++<?php
++$pass = str_repeat("k", 16);
++$iv = str_repeat("\0", 4);
++
++for ($i = 1; $i < 258; $i++) {
++    $data = str_repeat("a", $i);
++    $enc = openssl_encrypt($data, 'aes-128-wrap-pad', $pass, OPENSSL_RAW_DATA | OPENSSL_DONT_ZERO_PAD_KEY, $iv);
++    $dec = openssl_decrypt($enc, 'aes-128-wrap-pad', $pass, OPENSSL_RAW_DATA | OPENSSL_DONT_ZERO_PAD_KEY, $iv);
++    if ($dec !== $data) {
++        die("mismatch at $i\n");
++    }
++}
++
++echo "done\n";
++?>
++--EXPECT--
++done
+-- 
+2.43.7
+