High severity · published Oct 26, 2017
CVE-2017-15908
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()…
7.5
CVSS
23.6%
EPSS
No
On KEV
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 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 interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)23.6% · higher than 98% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SY
Systemd · Systemd Project
223; 224; 225; 226; 227; 228; +7 more · source: NVD
UL
Ubuntu Linux · Canonical
14.04; 16.04 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2017-15908
CVE.org
https://www.cve.org/CVERecord?id=CVE-2017-15908
Third Party Advisory
http://www.securityfocus.com/bid/101600
Third Party Advisory
http://www.securitytracker.com/id/1039662
Issue Tracking
https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1725351
Issue Tracking
https://github.com/systemd/systemd/pull/7184
Patch
https://usn.ubuntu.com/3558-1/
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