CVE-2017-15908

moderate-risk
Published 2017-10-26

In systemd 223 through 235, a remote DNS server can respond with a custom crafted DNS NSEC resource record to trigger an infinite loop in the dns_packet_read_type_window() function of the 'systemd-resolved' service and cause a DoS of the affected service.

Do I need to act?

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0.27% chance of exploitation
EPSS score — low exploit probability
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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 (15)

Affected Vendors

Canonical Systemd Project

References (10)

Third Party Advisory http://www.securityfocus.com/bid/101600
Third Party Advisory http://www.securitytracker.com/id/1039662
Issue Tracking https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1725351
Issue Tracking https://github.com/systemd/systemd/pull/7184
Patch https://usn.ubuntu.com/3558-1/
Third Party Advisory http://www.securityfocus.com/bid/101600
Third Party Advisory http://www.securitytracker.com/id/1039662
Issue Tracking https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1725351
Issue Tracking https://github.com/systemd/systemd/pull/7184
Patch https://usn.ubuntu.com/3558-1/
45
/ 100
moderate-risk
Severity 26/34 · High
Exploitability 1/34 · Minimal
Exposure 18/34 · Moderate