Man-in-the-Middle (MitM) attack in php (Alpine package)

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

Install update from vendor's website.

Vulnerable software versions

php (Alpine package): 5.4.17-r0 - 5.4.17-r1

CPE2.3

• cpe:2.3:a:alpine:php_alpine_package:5.4.17-r0:*:*:*:*:alpine_linux:*:2.6
• cpe:2.3:a:alpine:php_alpine_package:5.4.17-r1:*:*:*:*:alpine_linux:*:2.6

External links

https://git.alpinelinux.org/aports/commit/?id=1a8b152e8a88f0dbf4b4041048286b6c17476061

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.