File curl-CVE-2022-32208.patch of Package curl.25571

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File curl-CVE-2022-32208.patch of Package curl.25571

From 6ecdf5136b52af747e7bda08db9a748256b1cd09 Mon Sep 17 00:00:00 2001
From: Daniel Stenberg <daniel@haxx.se>
Date: Thu, 9 Jun 2022 09:27:24 +0200
Subject: [PATCH] krb5: return error properly on decode errors

Bug: https://curl.se/docs/CVE-2022-32208.html
CVE-2022-32208
Reported-by: Harry Sintonen
Closes #9051
---
 lib/krb5.c | 18 +++++++++++-------
 1 file changed, 11 insertions(+), 7 deletions(-)

Index: curl-7.60.0/lib/krb5.c
===================================================================
--- curl-7.60.0.orig/lib/krb5.c
+++ curl-7.60.0/lib/krb5.c
@@ -86,11 +86,8 @@ krb5_decode(void *app_data, void *buf, i
   enc.value = buf;
   enc.length = len;
   maj = gss_unwrap(&min, *context, &enc, &dec, NULL, NULL);
-  if(maj != GSS_S_COMPLETE) {
-    if(len >= 4)
-      strcpy(buf, "599 ");
+  if(maj != GSS_S_COMPLETE)
     return -1;
-  }
 
   memcpy(buf, dec.value, dec.length);
   len = curlx_uztosi(dec.length);
Index: curl-7.60.0/lib/security.c
===================================================================
--- curl-7.60.0.orig/lib/security.c
+++ curl-7.60.0/lib/security.c
@@ -192,6 +192,7 @@ static CURLcode read_data(struct connect
 {
   int len;
   CURLcode result;
+  int nread;
 
   result = socket_read(fd, &len, sizeof(len));
   if(result)
@@ -200,7 +201,10 @@ static CURLcode read_data(struct connect
   if(len) {
     /* only realloc if there was a length */
     len = ntohl(len);
-    buf->data = Curl_saferealloc(buf->data, len);
+    if(len > CURL_MAX_INPUT_LENGTH)
+      len = 0;
+    else
+      buf->data = Curl_saferealloc(buf->data, len);
   }
   if(!len || !buf->data)
     return CURLE_OUT_OF_MEMORY;
@@ -208,8 +212,11 @@ static CURLcode read_data(struct connect
   result = socket_read(fd, buf->data, len);
   if(result)
     return result;
-  buf->size = conn->mech->decode(conn->app_data, buf->data, len,
-                                 conn->data_prot, conn);
+  nread = conn->mech->decode(conn->app_data, buf->data, len,
+                             conn->data_prot, conn);
+  if(nread < 0)
+    return CURLE_RECV_ERROR;
+  buf->size = (size_t)nread;
   buf->index = 0;
   return CURLE_OK;
 }
Index: curl-7.60.0/lib/urldata.h
===================================================================
--- curl-7.60.0.orig/lib/urldata.h
+++ curl-7.60.0/lib/urldata.h
@@ -79,6 +79,10 @@
 */
 #define RESP_TIMEOUT (1800*1000)
 
+/* Max string intput length is a precaution against abuse and to detect junk
+   input easier and better. */
+#define CURL_MAX_INPUT_LENGTH 8000000
+
 #include "cookie.h"
 #include "formdata.h"

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File curl-CVE-2022-32208.patch of Package curl.25571

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