CVE-2017-9445

moderate-risk
Published 2017-06-28

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.

Do I need to act?

~
1.7% chance of exploitation in next 30 days
EPSS score — moderate exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.5/10 High
NETWORK / LOW complexity

Affected Products (1)

Affected Vendors

Systemd Project

References (8)

Mailing List http://openwall.com/lists/oss-security/2017/06/27/8
Third Party Advisory http://www.securityfocus.com/bid/99302
Third Party Advisory http://www.securitytracker.com/id/1038806
Broken Link https://launchpad.net/bugs/1695546
Mailing List http://openwall.com/lists/oss-security/2017/06/27/8
Third Party Advisory http://www.securityfocus.com/bid/99302
Third Party Advisory http://www.securitytracker.com/id/1038806
Broken Link https://launchpad.net/bugs/1695546
35
/ 100
moderate-risk
Severity 26/34 · High
Exploitability 4/34 · Minimal
Exposure 5/34 · Minimal