Out-of-bounds read in php (Alpine package)

Published: 2017-07-07

Risk	Low
Patch available	YES
Number of vulnerabilities	1
CVE-ID	CVE-2017-9227
CWE-ID	CWE-125
Exploitation vector	Network
Public exploit	N/A
Vulnerable software	php (Alpine package) Operating systems & Components / Operating system package or component
Vendor	Alpine Linux Development Team

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Out-of-bounds read

EUVDB-ID: #VU7347

Risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2017-9227

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a remote attacker to obtain potentially sensitive information.

The weakness exists in the mbstring due to an error in handling of reg->dmin in forward_search_range(). A remote attacker can trigger stack out-of-bounds read in mbc_enc_len() during regular expression searching and read arbitrary files on the system.

Successful exploitation of the vulnerability results in information disclosure.

Mitigation

Install update from vendor's website.

Vulnerable software versions

php (Alpine package): 5.6.30-r0

CPE2.3

cpe:2.3:o:alpine:php_alpine_package:5.6.30-r0:*:*:*:*:alpine_linux:*:3.2

External links

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.