File CVE-2024-34402.patch of Package uriparser.33965

From 760ade2947415dbb100053cf793c2f96fe257386 Mon Sep 17 00:00:00 2001
From: Sebastian Pipping <sebastian@pipping.org>
Date: Sun, 28 Apr 2024 21:26:45 +0200
Subject: [PATCH] Protect against integer overflow in ComposeQueryEngine

Requires string input that is longer than INT_MAX to exploit.
---
 src/UriQuery.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

--- a/src/UriQuery.c
+++ b/src/UriQuery.c
@@ -67,6 +67,7 @@
 #endif
 
 #include <limits.h>
+#include <stddef.h> /* size_t */
 
 
 
@@ -202,16 +203,16 @@ int URI_FUNC(ComposeQueryEngine)(URI_CHA
 		const URI_CHAR * const key = queryList->key;
 		const URI_CHAR * const value = queryList->value;
 		const int worstCase = (normalizeBreaks == URI_TRUE ? 6 : 3);
-		const int keyLen = (key == NULL) ? 0 : (int)URI_STRLEN(key);
+		const size_t keyLen = (key == NULL) ? 0 : URI_STRLEN(key);
 		int keyRequiredChars;
-		const int valueLen = (value == NULL) ? 0 : (int)URI_STRLEN(value);
+		const size_t valueLen = (value == NULL) ? 0 : URI_STRLEN(value);
 		int valueRequiredChars;
 		
-		if ((keyLen >= INT_MAX / worstCase) || (valueLen >= INT_MAX / worstCase)) {
+		if ((keyLen >= (size_t)INT_MAX / worstCase) || (valueLen >= (size_t)INT_MAX / worstCase)) {
 			return URI_ERROR_OUTPUT_TOO_LARGE;
 		}
-		keyRequiredChars = worstCase * keyLen;
-		valueRequiredChars = worstCase * valueLen;
+		keyRequiredChars = worstCase * (int)keyLen;
+		valueRequiredChars = worstCase * (int)valueLen;
 
 		if (dest == NULL) {
 			if (firstItem == URI_TRUE) {