Ubuntu update for PHP

1) Improper input validation

EUVDB-ID: #VU2555

Risk: Low

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2015-3330

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The weakness exists due to an error in the php_handler function in sapi/apache2handler/sapi_apache2.c in PHP before 5.4.40, 5.5.x before 5.5.24, and 5.6.x before 5.6.8, when the Apache HTTP Server 2.4.x is used. A remote attacker can cause application crash or possibly execute arbitrary code via pipelined HTTP requests that result in a "deconfigured interpreter."

Mitigation

Update the affected packages.

Vulnerable software versions

php5 (Ubuntu package): 5.3.2-1ubuntu4.1 - 5.3.10-1ubuntu3.17

External links

http://www.ubuntu.com/usn/usn-2572-1/

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) Stack-based buffer overflow

EUVDB-ID: #VU16109

Risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2015-3329

CWE-ID: CWE-121 - Stack-based buffer overflow

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The weakness exists due to multiple stack-based buffer overflows in the phar_set_inode function in phar_internal.h in PHP before 5.4.40, 5.5.x before 5.5.24, and 5.6.x before 5.6.8. A remote attacker can trigger memory corruption and execute arbitrary code via a crafted length value in a (1) tar, (2) phar, or (3) ZIP archive.

Mitigation

Update the affected packages.

Vulnerable software versions

php5 (Ubuntu package): 5.3.2-1ubuntu4.1 - 5.3.10-1ubuntu3.17

External links

http://www.ubuntu.com/usn/usn-2572-1/

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) Integer overflow

EUVDB-ID: #VU16110

Risk: Low

CVSSv3.1: 6.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2015-2305

CWE-ID: CWE-190 - Integer overflow

Exploit availability: No

Description

The vulnerability allows a local attacker to execute arbitrary code on the target system.

The vulnerability exists due to \integer overflow in the regcomp implementation in the Henry Spencer BSD regex library (aka rxspencer) alpha3.8.g5 on 32-bit platforms, as used in NetBSD through 6.1.5 and other products. A local attacker can trigger heap-based buffer overflow via a large regular expression and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Update the affected packages.

Vulnerable software versions

php5 (Ubuntu package): 5.3.2-1ubuntu4.1 - 5.3.10-1ubuntu3.17

External links

http://www.ubuntu.com/usn/usn-2572-1/

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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

4) Security restrictions bypass

EUVDB-ID: #VU16111

Risk: Low

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-2015-2348

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass security restrictions on the target system.

The weakness exists due to an error when the move_uploaded_file implementation in ext/standard/basic_functions.c in PHP before 5.4.39, 5.5.x before 5.5.23, and 5.6.x before 5.6.7 truncates a pathname upon encountering a x00 character. A remote attacker can bypass intended extension restrictions and create files with unexpected names via a crafted second argument.

Mitigation

Update the affected packages.

Vulnerable software versions

php5 (Ubuntu package): 5.3.2-1ubuntu4.1 - 5.3.10-1ubuntu3.17

External links

http://www.ubuntu.com/usn/usn-2572-1/

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.

5) Buffer over-read

EUVDB-ID: #VU16114

Risk: Low

CVSSv3.1: 7.1 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2015-2783

CWE-ID: CWE-126 - Buffer over-read

Exploit availability: No

Description

The vulnerability allows a remote attacker to obtain potentially sensitive information or cause DoS condition on the target system.

The weakness exists due to buffer over-read in ext/phar/phar.c in PHP before 5.4.40, 5.5.x before 5.5.24, and 5.6.x before 5.6.8. A remote attacker can obtain sensitive information from process memory or cause a denial of service via a crafted length value in conjunction with crafted serialized data in a phar archive, related to the phar_parse_metadata and phar_parse_pharfile functions.

Mitigation

Update the affected packages.

Vulnerable software versions

php5 (Ubuntu package): 5.3.2-1ubuntu4.1 - 5.3.10-1ubuntu3.17

External links

http://www.ubuntu.com/usn/usn-2572-1/

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.

6) Use-after-free error

EUVDB-ID: #VU16113

Risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2015-2787

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The weakness exists due to use-after-free vulnerability in the process_nested_data function in ext/standard/var_unserializer.re in PHP before 5.4.39, 5.5.x before 5.5.23, and 5.6.x before 5.6.7. A remote attacker can trigger memory corruption and execute arbitrary code via a crafted unserialize call that leverages use of the unset function within an __wakeup function.

Mitigation

Update the affected packages.

Vulnerable software versions

php5 (Ubuntu package): 5.3.2-1ubuntu4.1 - 5.3.10-1ubuntu3.17

External links

http://www.ubuntu.com/usn/usn-2572-1/

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.