Fedora 26 update for mingw-c-ares

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 updates from vendor's repository.

Vulnerable software versions

Fedora: 26

mingw-c-ares: before 1.13.0-1.fc26

CPE2.3

• cpe:2.3:o:fedoraproject:fedora:26:*:*:*:*:*:*:*
• cpe:2.3:a:fedoraproject:mingw-c-ares:*:*:*:*:*:fedora:*:*

External links

https://bodhi.fedoraproject.org/updates/FEDORA-2017-7c9a5b4791

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.