Out-of-bounds read in c-ares (Alpine package)

Published: 2017-07-14

Risk	Medium
Patch available	YES
Number of vulnerabilities	1
CVE-ID	CVE-2017-1000381
CWE-ID	CWE-125
Exploitation vector	Network
Public exploit	N/A
Vulnerable software	c-ares (Alpine package) Operating systems & Components / Operating system package or component
Vendor	Alpine Linux Development Team

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Out-of-bounds read

EUVDB-ID: #VU7563

Risk: Medium

CVSSv4.0: 6.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2017-1000381

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

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack and gain access to potentially sensitive data.

The vulnerability exists due to a boundary error in ares_parse_naptr_reply() function when processing NAPTR responses. A remote attacker can send a specially crafted DNS response to vulnerable application and perform denial of service attack or gain access to potentially sensitive data.

Mitigation

Install update from vendor's website.

Vulnerable software versions

c-ares (Alpine package): 1.12.0-r0

CPE2.3

cpe:2.3:a:alpine:c-ares_alpine_package:1.12.0-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.