Multiple vulnerabilities in PHP

1) Path traversal

EUVDB-ID: #VU40516

Risk: Medium

CVSSv3.1: 6.9 [AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:U/RL:U/RC:C]

CVE-ID: CVE-2015-6833

CWE-ID: CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform directory traversal attacks.

The vulnerability exists due to input validation error when processing directory traversal sequences in the PharData class in PHP before 5.4.44, 5.5.x before 5.5.28, and 5.6.x before 5.6.12. A remote authenticated attacker can send a specially crafted HTTP request and remote attackers to write to arbitrary files via a . (dot dot) in a ZIP archive entry that is mishandled during an extractTo call.

Mitigation

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

PHP: 5.5.0 - 5.6.11

External links

http://www.debian.org/security/2015/dsa-3344
http://www.openwall.com/lists/oss-security/2015/08/19/3
http://www.php.net/ChangeLog-5.php
http://bugs.php.net/bug.php?id=70019
http://security.gentoo.org/glsa/201606-10

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Use-after-free

EUVDB-ID: #VU40517

Risk: Medium

CVSSv3.1: 6.7 [AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:U/RL:U/RC:C]

CVE-ID: CVE-2015-6832

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error when processing crafted serialized data that triggers misuse of an array field. <a href="http://cwe.mitre.org/data/definitions/416. A remote attackers can execute arbitrary code.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

Mitigation

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

PHP: 5.5.0 - 5.6.11

External links

http://www.debian.org/security/2015/dsa-3344
http://www.php.net/ChangeLog-5.php
http://bugs.php.net/bug.php?id=70068
http://security.gentoo.org/glsa/201606-10

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

3) Input validation error

EUVDB-ID: #VU40518

Risk: Medium

CVSSv3.1: 6.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2015-6831

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to read and manipulate data.

Multiple use-after-free vulnerabilities in SPL in PHP before 5.4.44, 5.5.x before 5.5.28, and 5.6.x before 5.6.12 allow remote attackers to execute arbitrary code via vectors involving (1) ArrayObject, (2) SplObjectStorage, and (3) SplDoublyLinkedList, which are mishandled during unserialization. <a href="http://cwe.mitre.org/data/definitions/416.html">CWE-416: Use After Free</a>

Mitigation

Install update from vendor's website.

Vulnerable software versions

PHP: 5.4.43 - 5.6.11

External links

http://www.debian.org/security/2015/dsa-3344
http://www.openwall.com/lists/oss-security/2015/08/19/3
http://www.php.net/ChangeLog-5.php
http://www.securityfocus.com/bid/76737
http://bugs.php.net/bug.php?id=70155
http://bugs.php.net/bug.php?id=70166
http://bugs.php.net/bug.php?id=70168
http://bugs.php.net/bug.php?id=70169
http://security.gentoo.org/glsa/201606-10

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.