Vulnerabilities
Misconfiguration
Compliance
CVE Vulnerabilities

CVE-2017-15908

Loop with Unreachable Exit Condition ('Infinite Loop')

Published: Oct 26, 2017 | Modified: Apr 20, 2025
CVSS 3.x
7.5
HIGH
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.x
5 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P
RedHat/V2
RedHat/V3
7.5 MODERATE
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Ubuntu
MEDIUM
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Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2017-15908
CWEhttps://cwe.mitre.org/data/definitions/835.html

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.

Weakness

The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop.

Affected Software

NameVendorStart VersionEnd Version
SystemdSystemd_project223 (including)223 (including)
SystemdSystemd_project224 (including)224 (including)
SystemdSystemd_project225 (including)225 (including)
SystemdSystemd_project226 (including)226 (including)
SystemdSystemd_project227 (including)227 (including)
SystemdSystemd_project228 (including)228 (including)
SystemdSystemd_project229 (including)229 (including)
SystemdSystemd_project230 (including)230 (including)
SystemdSystemd_project231 (including)231 (including)
SystemdSystemd_project232 (including)232 (including)
SystemdSystemd_project233 (including)233 (including)
SystemdSystemd_project234 (including)234 (including)
SystemdSystemd_project235 (including)235 (including)
SystemdUbuntuartful*
SystemdUbuntudevel*
SystemdUbuntuesm-infra/xenial*
SystemdUbuntuxenial*
SystemdUbuntuzesty*

References

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