- Stefan Krause pointed out that libcurl would wrongly send away cookies to

sites in cases where the cookie clearly has a very old expiry date. The
  condition was simply that libcurl's date parser would fail to convert the
  date and it would then count as a (timed-based) match. Starting now, a
  missed date due to an unsupported date format or date range will now cause
  the cookie to not match.

CHANGES

@@ -6,6 +6,14 @@
 
                                   Changelog
 
+Daniel Stenberg (8 Sep 2008)
+- Stefan Krause pointed out that libcurl would wrongly send away cookies to
+  sites in cases where the cookie clearly has a very old expiry date. The
+  condition was simply that libcurl's date parser would fail to convert the
+  date and it would then count as a (timed-based) match. Starting now, a
+  missed date due to an unsupported date format or date range will now cause
+  the cookie to not match.
+
 Daniel Fandrich (5 Sep 2008)
 - Improved the logic the decides whether to use HTTP 1.1 features or not in a
   request.  Setting a specific version with CURLOPT_HTTP_VERSION overrides

RELEASE-NOTES

@@ -19,6 +19,7 @@ This release includes the following bugfixes:
  o MingW32 non-configure builds are now largefile feature enabled by default
  o NetWare LIBC builds are now largefile feature enabled by default
  o curl_easy_pause() could behave wrongly on unpause
+ o cookie with invalid expire dates are now considered expired
 
 This release includes the following known bugs:
 
@@ -32,6 +33,6 @@ This release would not have looked like this without help, code, reports and
 advice from friends like these:
 
  Keith Mok, Yang Tse, Daniel Fandrich, Guenter Knauf, Dmitriy Sergeyev,
- Linus Nielsen Feltzing, Martin Drasar
+ Linus Nielsen Feltzing, Martin Drasar, Stefan Krause
 
         Thanks! (and sorry if I forgot to mention someone)

lib/cookie.c

@@ -338,7 +338,8 @@ Curl_cookie_add(struct SessionHandle *data,
               break;
             }
             co->expires =
-              atoi((*co->maxage=='\"')?&co->maxage[1]:&co->maxage[0]) + (long)now;
+              atoi((*co->maxage=='\"')?&co->maxage[1]:&co->maxage[0]) +
+              (long)now;
           }
           else if(strequal("expires", name)) {
             co->expirestr=strdup(whatptr);
@@ -346,6 +347,9 @@ Curl_cookie_add(struct SessionHandle *data,
               badcookie = TRUE;
               break;
             }
+            /* Note that we store -1 in 'expires' here if the date couldn't
+               get parsed for whatever reason. This will have the effect that
+               the cookie won't match. */
             co->expires = curl_getdate(what, &now);
           }
           else if(!co->name) {
@@ -769,7 +773,7 @@ struct Cookie *Curl_cookie_getlist(struct CookieInfo *c,
     /* only process this cookie if it is not expired or had no expire
        date AND that if the cookie requires we're secure we must only
        continue if we are! */
-    if( (co->expires<=0 || (co->expires> now)) &&
+    if( (!co->expires || (co->expires > now)) &&
         (co->secure?secure:TRUE) ) {
 
       /* now check if the domain is correct */