#42222 [NEW]: php_openssl_make_REQ() buffer overflow
From: zatanzlatan at hotbrev dot com
Operating system: Linux
PHP version: 5CVS-2007-08-06 (CVS)
PHP Bug Type: Reproducible crash
Bug description: php_openssl_make_REQ() buffer overflow
Description:
------------
function php_openssl_make_REQ() in ext/openssl/openssl.c has buffer
overflow when parsing openssl.conf
look at this:
char buffer[200];
v = sk_CONF_VALUE_value(dn_sk, i);
type = v->name;
len = strlen(type);
if (len < sizeof("_default")) {
continue;
}
len -= sizeof("_default") - 1;
if (strcmp("_default", type + len) != 0) {
continue;
}
memcpy(buffer, type, len);
buffer[len] = '\0';
no check if name field with "_default" removed is larger than 200!
if u change "0.organizationName_default" in openssl.conf to "0." + 300
chars + "_default" then the buffer will be overflown in the memcpy().
Reproduce code:
---------------
u can test this with openssl_csr_new().
Expected result:
----------------
program should keep running.
Actual result:
--------------
program crashed.
--
Edit bug report at http://bugs.php.net/?id=42222&edit=1
--
Try a CVS snapshot (PHP 4.4): http://bugs.php.net/fix.php?id=42222&r=trysnapshot44
Try a CVS snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=42222&r=trysnapshot52
Try a CVS snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=42222&r=trysnapshot60
Fixed in CVS: http://bugs.php.net/fix.php?id=42222&r=fixedcvs
Fixed in release: http://bugs.php.net/fix.php?id=42222&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=42222&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=42222&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=42222&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=42222&r=support
Expected behavior: http://bugs.php.net/fix.php?id=42222&r=notwrong
Not enough info: http://bugs.php.net/fix.php?id=42222&r=notenoughinfo
Submitted twice: http://bugs.php.net/fix.php?id=42222&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=42222&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=42222&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=42222&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=42222&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=42222&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=42222&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=42222&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=42222&r=mysqlcfg
Thread (2 messages)
- zatanzlatan at hotbrev dot com