initial hardening - guarding for index overflows

hummingbird-project · Mar 18, 2024 · 08131bd · 08131bd
1 parent dd36634
commit 08131bd
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/Sources/HummingbirdCore/Utils/HBParser.swift b/Sources/HummingbirdCore/Utils/HBParser.swift
@@ -600,6 +600,9 @@ extension Parser {
             while index < original.endIndex {
                 // if we have found a percent sign
                 if original[index] == 0x25 {
+                    guard original.endIndex - index >= 2 else {
+                        throw DecodeError()
+                    }
                     let high = Self.asciiHexValues[Int(original[index + 1])]
                     let low = Self.asciiHexValues[Int(original[index + 2])]
                     index += 3