DNS: Systemd Resolved NSEC Record Denial Of services
This signature detects attempts to exploit a known vulnerability against Systemd . A successful exploit can lead to Denial Of Services.
Extended Description
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.
Affected Products
Canonical ubuntu_linux
Short Name
DNS:SYSTEMD-NSEC-DOS
Severity
Major
Recommended
True
Recommended Action
Drop
Category
DNS
Keywords
CVE-2017-15908 Denial NSEC Of Record Resolved Systemd services
Release Date
03/13/2018
Supported Platforms
mx-19.3
vmx-19.3
vsrx-19.2
srx-19.3
srx-branch-19.3
vsrx3bsd-19.2
srx-19.4
vsrx3bsd-19.4
srx-branch-19.4
vsrx-19.4
vmx-19.4
mx-19.4
srxevo-25.4
vsrx-26.2
srx-26.2
srx-branch-26.2
vsrx3bsd-26.2
mx-12.3
srx-12.3
srx-branch-12.3
vsrx-12.3
Sigpack Version
3590
False Positive
Unknown
Vendors
Systemd_project
Canonical
CVSS Score
5.0