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Bug #660 Long cookies containing characters that need encoding
Submitted: 1998-08-18 05:21 UTC Modified: 1998-08-18 08:48 UTC
From: drew at elysium dot demon dot co dot uk Assigned:
Status: Closed Package: Reproducible Crash
PHP Version: 3.0.3 OS: Redhat Linux 4.2
Private report: No CVE-ID: None
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From: drew at elysium dot demon dot co dot uk
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 [1998-08-18 05:21 UTC] drew at elysium dot demon dot co dot uk
Using the SetCookie function set a long cookie containg lots of characters that need encoding.  The following patch fixes
the problem, the size of the value string was calculated before it was encoded, and the string gets larger after encoding.

*** head.c.orig Fri Aug  7 22:37:32 1998
--- head.c      Mon Aug 17 14:23:52 1998
***************
*** 233,239 ****
        CookieList *cookie;
        int len = 0;
        time_t t;
!       char *r, *dt;
  #endif
  #if APACHE || defined(USE_SAPI) || FHTTPD
        char *tempstr;
--- 233,239 ----
        CookieList *cookie;
        int len = 0;
        time_t t;
!       char *dt, *cookievalue = NULL;
  #endif
  #if APACHE || defined(USE_SAPI) || FHTTPD
        char *tempstr;
***************
*** 259,266 ****
                while (cookie) {
                        if (cookie->name)
                                len += strlen(cookie->name);
!                       if (cookie->value)
!                               len += strlen(cookie->value);
                        if (cookie->path)
                                len += strlen(cookie->path);
                        if (cookie->domain)
--- 259,268 ----
                while (cookie) {
                        if (cookie->name)
                                len += strlen(cookie->name);
!                       if (cookie->value) {
!                               cookievalue = _php3_urlencode(cookie->value, str
len (cookie->value));
!                               len += strlen(cookievalue);
!                       }
                        if (cookie->path)
                                len += strlen(cookie->path);
                        if (cookie->domain)
***************
*** 280,292 ****
                                efree(dt);
                        } else {
                                /* FIXME: XXX: this is not binary data safe */
!                               r = _php3_urlencode(cookie->value, strlen (cooki
e->value));
!                               sprintf(tempstr, "%s=%s", cookie->name, cookie->
value ? r : "");
!                               if (r) efree(r);
                                if (cookie->name) efree(cookie->name);
                                if (cookie->value) efree(cookie->value);
                                cookie->name=NULL;
                                cookie->value=NULL;
                                if (cookie->expires > 0) {
                                        strcat(tempstr, "; expires=");
                                        dt = php3_std_date(cookie->expires);
--- 282,294 ----
                                efree(dt);
                        } else {
                                /* FIXME: XXX: this is not binary data safe */
!                               sprintf(tempstr, "%s=%s", cookie->name, cookie->
value ? cookievalue : "");
                                if (cookie->name) efree(cookie->name);
                                if (cookie->value) efree(cookie->value);
+                               if (cookievalue) efree(cookievalue);
                                cookie->name=NULL;
                                cookie->value=NULL;
+                               cookievalue=NULL;
                                if (cookie->expires > 0) {
                                        strcat(tempstr, "; expires=");
                                        dt = php3_std_date(cookie->expires);
***************
*** 314,319 ****
--- 316,322 ----
                        if (cookie->path) efree(cookie->path);
                        if (cookie->name) efree(cookie->name);
                        if (cookie->value) efree(cookie->value);
+                       if (cookievalue) efree(cookievalue);
                        efree(cookie);
                        cookie = php3_PopCookieList();
                        efree(tempstr);

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 [1998-08-18 08:48 UTC] rasmus
Applied - Thanks for catching that.
 
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