Signature Detail
This site is deprecated. Please CLICK HERE for latest updates
Short Name |
DNS:SYSTEMD-NSEC-DOS |
|---|---|
Severity |
Major |
Recommended |
Yes |
Recommended Action |
Drop |
Category |
DNS |
Keywords |
Systemd Resolved NSEC Record Denial Of services |
Release Date |
2018/03/13 |
Update Number |
3045 |
Supported Platforms |
idp-4.0+, isg-3.4+, j-series-9.5+, mx-11.4+, srx-12.1+, srx-branch-12.1+, vmx-17.4+, vsrx-12.1+, vsrx3bsd-18.2+ |
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
- Freedesktop systemd 223
- Freedesktop systemd 224
- Freedesktop systemd 225
- Freedesktop systemd 226
- Freedesktop systemd 227
- Freedesktop systemd 228
- Freedesktop systemd 229
- Freedesktop systemd 230
- Freedesktop systemd 231
- Freedesktop systemd 232
- Freedesktop systemd 233
- Freedesktop systemd 234
- Freedesktop systemd 235
References