From b0eabcaf4d4f371514891a52115c746815c2ff15 Mon Sep 17 00:00:00 2001
From: Pycatchown <39068868+Pycatchown@users.noreply.github.com>
Date: Tue, 8 Apr 2025 17:39:30 +0200
Subject: [PATCH] Update fcgiapp.c

Fixing an integer overflow (CVE-2025-23016)
---
 libfcgi/fcgiapp.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/libfcgi/fcgiapp.c b/libfcgi/fcgiapp.c
index 4ffe318..99c3630 100644
--- a/libfcgi/fcgiapp.c
+++ b/libfcgi/fcgiapp.c
@@ -1175,6 +1175,10 @@ static int ReadParams(Params *paramsPtr, FCGX_Stream *stream)
 	    }
             nameLen = ((nameLen & 0x7f) << 24) + (lenBuff[0] << 16)
                     + (lenBuff[1] << 8) + lenBuff[2];
+	    if (nameLen >= INT_MAX) {
+                SetError(stream, FCGX_PARAMS_ERROR);
+                return -1;
+	    }
         }
         if((valueLen = FCGX_GetChar(stream)) == EOF) {
             SetError(stream, FCGX_PARAMS_ERROR);
@@ -1187,6 +1191,10 @@ static int ReadParams(Params *paramsPtr, FCGX_Stream *stream)
 	    }
             valueLen = ((valueLen & 0x7f) << 24) + (lenBuff[0] << 16)
                     + (lenBuff[1] << 8) + lenBuff[2];
+	    if (valueLen >= INT_MAX) {
+                SetError(stream, FCGX_PARAMS_ERROR);
+                return -1;
+	    }
         }
         /*
          * nameLen and valueLen are now valid; read the name and value