Infinite loop in systemd - CVE-2017-15908

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Main Vulnerability Database Vulnerabilities #VU8961

Infinite loop in systemd - CVE-2017-15908

Published: October 26, 2017 / Updated: October 27, 2017


Vulnerability identifier: #VU8961
CSH Severity: Low
CVSS v4: 8.7 [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]
CVE-ID: CVE-2017-15908
CWE-ID: CWE-835
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

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.


Affected software

systemd
Ubuntu

How to mitigate CVE-2017-15908

Install update from vendor's website.


External References

Related Security Bulletins