CVE-2017-9445

high

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.

References

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

Details

Source: MITRE

Published: 2017-06-28

Updated: 2017-07-07

Type: CWE-787

Risk Information

CVSS v2

Base Score: 5

Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P

Impact Score: 2.9

Exploitability Score: 10

Severity: MEDIUM

CVSS v3

Base Score: 7.5

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

Impact Score: 3.6

Exploitability Score: 3.9

Severity: HIGH