Ubuntu update for PHP

1) Man-in-the-Middle (MitM) attack

EUVDB-ID: #VU16074

Risk: Low

CVSSv4.0: 1.7 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2013-4248

CWE-ID: CWE-300 - Channel Accessible by Non-Endpoint ('Man-in-the-Middle')

Exploit availability: No

Description

The vulnerability allows a remote attacker to conduct MITM-attack on the target system.

The weakness exists due to the openssl_x509_parse function in openssl.c in the OpenSSL module in PHP before 5.4.18 and 5.5.x before 5.5.2 does not properly handle a '' character in a domain name in the Subject Alternative Name field of an X.509 certificate. A remote attacker can use man-in-the-middle technique and spoof arbitrary SSL servers via a crafted certificate issued by a legitimate Certification Authority.

Mitigation

Update the affected packages.

Ubuntu 13.04:

php5-cli 5.4.9-4ubuntu2.3

php5-cgi 5.4.9-4ubuntu2.3

libapache2-mod-php5 5.4.9-4ubuntu2.3

Ubuntu 12.10:

php5-cli 5.4.6-1ubuntu1.4

php5-cgi 5.4.6-1ubuntu1.4

libapache2-mod-php5 5.4.6-1ubuntu1.4

Ubuntu 12.04 LTS:

php5-cli 5.3.10-1ubuntu3.8

php5-cgi 5.3.10-1ubuntu3.8

libapache2-mod-php5 5.3.10-1ubuntu3.8

Ubuntu 10.04 LTS:

php5-cli 5.3.2-1ubuntu4.21

php5-cgi 5.3.2-1ubuntu4.21

libapache2-mod-php5 5.3.2-1ubuntu4.21

libapache2-mod-php5filter 5.3.2-1ubuntu4.21

Vulnerable software versions

php5 (Ubuntu package): 5.3.2-1ubuntu4.1 - 5.3.10-1ubuntu3.7

CPE2.3

• cpe:2.3:o:canonical:php5_ubuntu_package:5.3.2-1ubuntu4.1:*:*:*:*:ubuntu:*:*
• cpe:2.3:o:canonical:php5_ubuntu_package:5.3.2-1ubuntu4.2:*:*:*:*:ubuntu:*:*
• cpe:2.3:o:canonical:php5_ubuntu_package:5.3.2-1ubuntu4.5:*:*:*:*:ubuntu:*:*

External links

https://www.ubuntu.com/usn/usn-1937-1/

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.