PHP 5.3.x < 5.3.7 crypt() MD5 Incorrect Return Value

High Nessus Network Monitor Plugin ID 6017


The remote web server uses a version of PHP that is affected by a security bypass vulnerability.


Versions of PHP 5.3.x prior to 5.3.7 contains a bug in the crypt() function when generating salted MD5 hashes. The function only returns the salt rather than the salt and hash. Any authentication mechanism that uses crypt() could authorize all authentication attempts due to this bug.


Upgrade to PHP version 5.3.8 or later.

See Also

Plugin Details

Severity: High

ID: 6017

Family: Web Servers

Published: 2011/08/24

Modified: 2016/11/23

Dependencies: 8682

Nessus ID: 55969

Risk Information

Risk Factor: High


Base Score: 7.5

Temporal Score: 6.2

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

Temporal Vector: CVSS2#E:F/RL:OF/RC:C


Base Score: 7.3

Temporal Score: 6.8


Temporal Vector: CVSS3#E:F/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:php:php

Patch Publication Date: 2011/08/23

Vulnerability Publication Date: 2011/08/17

Reference Information

BID: 49376