CVE-2017-9445 Information

Description

In systemd through 233 certain sizes passed to dns_packet_new in systemd-resolved can cause it to allocate a buffer that’s too small. A malicious DNS server can exploit this via a response with a specially crafted TCP payload to trick systemd-resolved into allocating a buffer that’s too small and subsequently write arbitrary data beyond the end of it.

CVSS Vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Reference

http://openwall.com/lists/oss-security/2017/06/27/8 http://www.securityfocus.com/bid/99302 http://www.securitytracker.com/id/1038806 https://launchpad.net/bugs/1695546

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

7.5