From 5d9e54065ed18c51e4f25d8900635f90810c7394 Mon Sep 17 00:00:00 2001
From: Niels Dossche <7771979+nielsdos@users.noreply.github.com>
Date: Thu, 24 Oct 2024 22:02:17 +0200
Subject: [PATCH 1/8] Fix GHSA-5hqh-c84r-qjcv: Integer overflow in the dblib
 quoter causing OOB writes

(cherry picked from commit d9baa9fed8c3ba692a36b388c0c7762e5102e2e0)
---
 ext/pdo_dblib/dblib_driver.c                 |  8 ++++++-
 ext/pdo_dblib/tests/GHSA-5hqh-c84r-qjcv.phpt | 24 ++++++++++++++++++++
 2 files changed, 31 insertions(+), 1 deletion(-)
 create mode 100644 ext/pdo_dblib/tests/GHSA-5hqh-c84r-qjcv.phpt

diff --git a/ext/pdo_dblib/dblib_driver.c b/ext/pdo_dblib/dblib_driver.c
index 7f160a402f7..d7d0901ea1a 100644
--- a/ext/pdo_dblib/dblib_driver.c
+++ b/ext/pdo_dblib/dblib_driver.c
@@ -152,6 +152,7 @@ static int dblib_handle_quoter(pdo_dbh_t *dbh, const char *unquoted, size_t unqu
 
 	size_t i;
 	char * q;
+	size_t extralen = 0;
 	*quotedlen = 0;
 
 	if (H->assume_national_character_set_strings) {
@@ -166,7 +167,7 @@ static int dblib_handle_quoter(pdo_dbh_t *dbh, const char *unquoted, size_t unqu
 
 	/* Detect quoted length, adding extra char for doubled single quotes */
 	for (i = 0; i < unquotedlen; i++) {
-		if (unquoted[i] == '\'') ++*quotedlen;
+		if (unquoted[i] == '\'') ++extralen;
 		++*quotedlen;
 	}
 
@@ -174,6 +175,11 @@ static int dblib_handle_quoter(pdo_dbh_t *dbh, const char *unquoted, size_t unqu
 	if (use_national_character_set) {
 		++*quotedlen; /* N prefix */
 	}
+	if (UNEXPECTED(*quotedlen > ZSTR_MAX_LEN - extralen)) {
+		return 0;
+	}
+
+	*quotedlen += extralen;
 	q = *quoted = emalloc(*quotedlen + 1); /* Add byte for terminal null */
 	if (use_national_character_set) {
 		*q++ = 'N';
diff --git a/ext/pdo_dblib/tests/GHSA-5hqh-c84r-qjcv.phpt b/ext/pdo_dblib/tests/GHSA-5hqh-c84r-qjcv.phpt
new file mode 100644
index 00000000000..431c61951ee
--- /dev/null
+++ b/ext/pdo_dblib/tests/GHSA-5hqh-c84r-qjcv.phpt
@@ -0,0 +1,24 @@
+--TEST--
+GHSA-5hqh-c84r-qjcv (Integer overflow in the dblib quoter causing OOB writes)
+--EXTENSIONS--
+pdo_dblib
+--SKIPIF--
+<?php
+if (PHP_INT_SIZE != 4) die("skip for 32bit platforms only");
+if (PHP_OS_FAMILY === "Windows") die("skip not for Windows because the virtual address space for application is only 2GiB");
+if (getenv("SKIP_SLOW_TESTS")) die("skip slow test");
+require __DIR__ . '/config.inc';
+getDbConnection();
+?>
+--INI--
+memory_limit=-1
+--FILE--
+<?php
+
+require __DIR__ . '/config.inc';
+$db = getDbConnection();
+var_dump($db->quote(str_repeat("'", 2147483646)));
+
+?>
+--EXPECT--
+bool(false)
-- 
2.47.0

From b4f73be75dbdde970a18cc7a636898b10400fb3f Mon Sep 17 00:00:00 2001
From: Niels Dossche <7771979+nielsdos@users.noreply.github.com>
Date: Thu, 24 Oct 2024 22:02:36 +0200
Subject: [PATCH 2/8] Fix GHSA-5hqh-c84r-qjcv: Integer overflow in the firebird
 quoter causing OOB writes

(cherry picked from commit 69c5f68fdc3deed9ebce2cc44b4bf5e0c47cd28f)
---
 ext/pdo_firebird/firebird_driver.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/ext/pdo_firebird/firebird_driver.c b/ext/pdo_firebird/firebird_driver.c
index e0a424c56ab..fb697978503 100644
--- a/ext/pdo_firebird/firebird_driver.c
+++ b/ext/pdo_firebird/firebird_driver.c
@@ -663,7 +663,7 @@ free_statement:
 static int firebird_handle_quoter(pdo_dbh_t *dbh, const char *unquoted, size_t unquotedlen, /* {{{ */
 	char **quoted, size_t *quotedlen, enum pdo_param_type paramtype)
 {
-	int qcount = 0;
+	size_t qcount = 0;
 	char const *co, *l, *r;
 	char *c;
 
@@ -678,6 +678,10 @@ static int firebird_handle_quoter(pdo_dbh_t *dbh, const char *unquoted, size_t u
 	/* count the number of ' characters */
 	for (co = unquoted; (co = strchr(co,'\'')); qcount++, co++);
 
+	if (UNEXPECTED(unquotedlen + 2 > ZSTR_MAX_LEN - qcount)) {
+		return 0;
+	}
+
 	*quotedlen = unquotedlen + qcount + 2;
 	*quoted = c = emalloc(*quotedlen+1);
 	*c++ = '\'';
-- 
2.47.0