Infinite loop in systemd - CVE-2017-15908
Published: October 26, 2017 / Updated: October 27, 2017
Vulnerability identifier: #VU8961
CSH Severity: Low
CVSS v4.0: 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
CVE-ID: CVE-2017-15908
CWE-ID: CWE-835
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Freedesktop.org
Affected software:
systemd
systemd
Detailed vulnerability description
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.
How to mitigate CVE-2017-15908
Install update from vendor's website.