SB2017102704 - Denial of service in systemd

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Main Vulnerability Database SB2017102704

SB2017102704 - Denial of service in systemd

Published: October 27, 2017

Security Bulletin ID SB2017102704
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Infinite loop (CVE-ID: CVE-2017-15908)

CWE-ID: CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a remote attacker to cause DoS condition on the target system.

The vulnerability exists in systemd due to an infinite loop in the dns_packet_read_type_window() function in the 'systemd-resolved' service. A remote attacker can return specially crafted DNS NSEC resource record data to the connected target client system, trigger an infinite loop and cause the target systemd-resolve service to fail to respond.

Successful exploitation of the vulnerability results in denial of service.


Remediation

Install update from vendor's website.

References