PHP 5.6.x < 5.6.24 Multiple Vulnerabilities (httpoxy)

critical Nessus Plugin ID 92555

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Synopsis

The version of PHP running on the remote web server is affected by multiple vulnerabilities.

Description

According to its banner, the version of PHP running on the remote web server is 5.6.x prior to 5.6.24. It is, therefore, affected by multiple vulnerabilities :

- A man-in-the-middle vulnerability exists, known as 'httpoxy', due to a failure to properly resolve namespace conflicts in accordance with RFC 3875 section 4.1.18. The HTTP_PROXY environment variable is set based on untrusted user data in the 'Proxy' header of HTTP requests. The HTTP_PROXY environment variable is used by some web client libraries to specify a remote proxy server. An unauthenticated, remote attacker can exploit this, via a crafted 'Proxy' header in an HTTP request, to redirect an application's internal HTTP traffic to an arbitrary proxy server where it may be observed or manipulated. (CVE-2016-5385)

- An overflow condition exists in the php_bz2iop_read() function within file ext/bz2/bz2.c due to improper handling of error conditions. An unauthenticated, remote attacker can exploit this, via a crafted request, to execute arbitrary code. (CVE-2016-5399)

- A flaw exists in the GD Graphics Library (libgd), specifically in the gdImageScaleTwoPass() function within file gd_interpolation.c, due to improper validation of user-supplied input. An unauthenticated, remote attacker can exploit this to cause a denial of service condition. (CVE-2016-6207)

- An integer overflow condition exists in the virtual_file_ex() function within file Zend/zend_virtual_cwd.c due to improper validation of user-supplied input. An unauthenticated, remote attacker can exploit this to cause a denial of service condition or the execution of arbitrary code. (CVE-2016-6289)

- A use-after-free error exists within the file ext/session/session.c when handling 'var_hash' destruction. An unauthenticated, remote attacker can exploit this to deference already freed memory, resulting in the execution of arbitrary code.
(CVE-2016-6290)

- An out-of-bounds read error exists in the exif_process_IFD_in_MAKERNOTE() function within file ext/exif/exif.c. An unauthenticated, remote attacker can exploit this to cause a denial of service condition or disclose memory contents. (CVE-2016-6291)

- A NULL pointer dereference flaw exists in the exif_process_user_comment() function within file ext/exif/exif.c. An unauthenticated, remote attacker can exploit this to cause a denial of service condition.
(CVE-2016-6292)

- Multiple out-of-bounds read errors exist in the locale_accept_from_http() function within file ext/intl/locale/locale_methods.c. An unauthenticated, remote attacker can exploit these to cause a denial of service condition or disclose memory contents.
(CVE-2016-6293, CVE-2016-6294)

- A use-after-free error exists within file ext/snmp/snmp.c when handling garbage collection during deserialization of user-supplied input. An unauthenticated, remote attacker can exploit this to deference already freed memory, resulting in the execution of arbitrary code. (CVE-2016-6295)

- A heap-based buffer overflow condition exists in the simplestring_addn() function within file simplestring.c due to improper validation of user-supplied input. An unauthenticated, remote attacker can exploit this to cause a denial of service condition or the execution of arbitrary code. (CVE-2016-6296)

- An integer overflow condition exists in the php_stream_zip_opener() function within file ext/zip/zip_stream.c due to improper validation of user-supplied input when handling zip streams. An unauthenticated, remote attacker can exploit this to cause a denial of service condition or the execution of arbitrary code. (CVE-2016-6297)

- An out-of-bounds read error exists in the GD Graphics Library (libgd), specifically in the gdImageScaleBilinearPalette() function within file gd_interpolation.c, when handling transparent color. An unauthenticated, remote attacker can exploit this to cause a denial of service condition or disclose memory contents.

- A heap-based buffer overflow condition exists in the mdecrypt_generic() function within file ext/mcrypt/mcrypt.c due to improper validation of user-supplied input. An unauthenticated, remote attacker can exploit this to cause a denial of service condition or the execution of arbitrary code.

- A NULL write flaw exists in the GD Graphics Library (libgd) in the gdImageColorTransparent() function due to improper handling of negative transparent colors. A remote attacker can exploit this to disclose memory contents.

Solution

Upgrade to PHP version 5.6.24 or later.

Plugin Details

Severity: Critical

ID: 92555

File Name: php_5_6_24.nasl

Version: 1.19

Type: remote

Family: CGI abuses

Published: 7/26/2016

Updated: 5/28/2024

Configuration: Enable thorough checks

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.9

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

CVSS Score Source: CVE-2016-6290

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:php:php

Required KB Items: www/PHP

Excluded KB Items: Settings/disable_cgi_scanning

Exploit Available: true

Exploit Ease: No exploit is required

Patch Publication Date: 7/21/2016

Vulnerability Publication Date: 7/18/2016

Reference Information

CVE: CVE-2016-5385, CVE-2016-5399, CVE-2016-6207, CVE-2016-6289, CVE-2016-6290, CVE-2016-6291, CVE-2016-6292, CVE-2016-6293, CVE-2016-6294, CVE-2016-6295, CVE-2016-6296, CVE-2016-6297

BID: 91821, 92051, 92073, 92074, 92078, 92094, 92095, 92097, 92099

CERT: 797896

Detections

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