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.
CVSS Metrics
- Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Attack Vector
- network
- Complexity
- low
- Privileges
- none
- User Action
- none
- Scope
- unchanged
- Confidentiality
- none
- Integrity
- none
- Availability
- high
- Weaknesses
- CWE-835
Metadata
- Primary Vendor
- SYSTEMD_PROJECT
- Published
- 10/26/2017
- Last Modified
- 4/20/2025
- Source
- NIST NVD
- Note: Verify all details with official vendor sources before applying patches.
Affected Products
systemd_project : systemdsystemd_project : systemdsystemd_project : systemdsystemd_project : systemdsystemd_project : systemdsystemd_project : systemdsystemd_project : systemdsystemd_project : systemdsystemd_project : systemdsystemd_project : systemdsystemd_project : systemdsystemd_project : systemdsystemd_project : systemdcanonical : ubuntu_linuxcanonical : ubuntu_linux
AI-Powered Remediation
Generate remediation guidance or a C-suite brief for this vulnerability.