Multiple vulnerabilities in PHP

1) Buffer overflow

EUVDB-ID: #VU31455

Risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2015-8878

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

main/php_open_temporary_file.c in PHP before 5.5.28 and 5.6.x before 5.6.12 does not ensure thread safety, which allows remote attackers to cause a denial of service (race condition and heap memory corruption) by leveraging an application that performs many temporary-file accesses.

Mitigation

Install update from vendor's website.

Vulnerable software versions

PHP: 5.6.0 - 5.6.11

CPE2.3

• cpe:2.3:a:php_group:php:5.6.11:*:*:*:*:*:*:*

External links

https://www.php.net/ChangeLog-5.php
https://bugs.php.net/bug.php?id=70002

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) Input validation error

EUVDB-ID: #VU31456

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2015-8876

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows remote attackers to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can cause a denial of service (NULL pointer dereference and application crash) or trigger unintended method execution via crafted serialized data.

Mitigation

Update to version 5.6.12.

Vulnerable software versions

PHP: 5.6.0 - 5.6.11

CPE2.3

External links

https://rhn.redhat.com/errata/RHSA-2016-2750.html
https://www.php.net/ChangeLog-5.php
https://bugs.php.net/bug.php?id=70121

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) Cryptographic issues

EUVDB-ID: #VU31457

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2015-8867

CWE-ID: CWE-310 - Cryptographic Issues

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.

The openssl_random_pseudo_bytes function in ext/openssl/openssl.c in PHP before 5.4.44, 5.5.x before 5.5.28, and 5.6.x before 5.6.12 incorrectly relies on the deprecated RAND_pseudo_bytes function, which makes it easier for remote attackers to defeat cryptographic protection mechanisms via unspecified vectors.

Mitigation

Install update from vendor's website.

Vulnerable software versions

PHP: 5.6.0 - 5.6.11

CPE2.3

External links

https://git.php.net/?p=php-src.git;a=commit;h=16023f3e3b9c06cf677c3c980e8d574e4c162827
https://lists.opensuse.org/opensuse-security-announce/2016-05/msg00031.html
https://lists.opensuse.org/opensuse-security-announce/2016-05/msg00033.html
https://lists.opensuse.org/opensuse-security-announce/2016-05/msg00056.html
https://rhn.redhat.com/errata/RHSA-2016-2750.html
https://www.openwall.com/lists/oss-security/2016/04/24/1
https://www.php.net/ChangeLog-5.php
https://www.php.net/ChangeLog-7.php
https://www.ubuntu.com/usn/USN-2952-1
https://www.ubuntu.com/usn/USN-2952-2
https://bugs.launchpad.net/ubuntu/+source/php5/+bug/1534203
https://bugs.php.net/bug.php?id=70014

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.