1) Deserialization of untrusted data

EUVDB-ID: #VU10334

Risk: Low

CVSSv3.1:

CVE-ID: CVE-2016-9138

CWE-ID: CWE-502 - Deserialization of Untrusted Data

Exploit availability: No

Description

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

The vulnerability exists due to unsafe handling of serialized data when processing property modification during __wakeup(). A remote attacker can pass specially crafted serialized data to the application and cause denial of service attack.

Mitigation

Update to version 5.6.28 or 7.0.13.

Vulnerable software versions

PHP: 7.0.0 - 7.0.12, 5.6.0 - 5.6.27, 5.5.0 - 5.5.38

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CPE2.3

• cpe:2.3:a:php_group:php:7.0.12:*:*:*:*:*:*:*

External links

http://bugs.php.net/bug.php?id=73147

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

2) Use-after-free error

EUVDB-ID: #VU1001

Risk: High

CVSSv3.1:

CVE-ID: CVE-2015-6835

CWE-ID: CWE-416 - Use After Free

Exploit availability: Yes

Description

The vulnerability alows a remote unauthenticated user to execute arbitrary code or cause DoS conditions on the target system.
The weakness exists due to incorrect processing of multiple php_var_unserialize calls while deserializing data with the session deserializer. By sending a specially crafted serialized string, attackers can trigger a use-after-free that can be used to execute arbitrary code or cause a service crash.
Successful exploitation of the vulnerability results in arbitrary code execution or denial of service on the vulnerable system.

Mitigation

Update to version 5.5.38, 5.6.27 or 7.0.12.

Vulnerable software versions

PHP: 5.4.1 - 5.4.44, 5.5.0 - 5.5.28, 5.6.0 - 5.6.12

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CPE2.3

• cpe:2.3:a:php_group:php:5.4.44:*:*:*:*:*:*:*

External links

http://bugs.php.net/bug.php?id=73147

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?