Vulnerability Details : 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() function of the 'systemd-resolved' service and cause a DoS of the affected service.
Vulnerability category: Denial of service
Exploit prediction scoring system (EPSS) score for CVE-2017-15908
Probability of exploitation activity in the next 30 days: 95.51%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 99 % EPSS Score History EPSS FAQ
CVSS scores for CVE-2017-15908
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source |
|---|---|---|---|---|---|
|
5.0
|
MEDIUM | AV:N/AC:L/Au:N/C:N/I:N/A:P |
10.0
|
2.9
|
NIST |
|
7.5
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
3.9
|
3.6
|
NIST |
CWE ids for CVE-2017-15908
-
The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop.Assigned by: nvd@nist.gov (Primary)
References for CVE-2017-15908
-
https://usn.ubuntu.com/3558-1/
USN-3558-1: systemd vulnerabilities | Ubuntu security noticesPatch;Third Party Advisory
-
https://github.com/systemd/systemd/pull/7184
resolved: fix loop on packets with pseudo dns types by keszybz · Pull Request #7184 · systemd/systemd · GitHubIssue Tracking;Patch;Third Party Advisory
-
http://www.securitytracker.com/id/1039662
systemd Infinite Loop in dns_packet_read_type_window() Lets Remote Users Deny Service - SecurityTrackerThird Party Advisory;VDB Entry
-
http://www.securityfocus.com/bid/101600
systemd 'dns_packet_read_type_window()' Function Denial of Service VulnerabilityVDB Entry;Third Party Advisory
-
https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1725351
Bug #1725351 “Systemd - Remote DOS of systemd-resolve service” : Bugs : systemd package : UbuntuIssue Tracking;Patch;Third Party Advisory
Products affected by CVE-2017-15908
- cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
- cpe:2.3:a:systemd_project:systemd:228:*:*:*:*:*:*:*
- cpe:2.3:a:systemd_project:systemd:229:*:*:*:*:*:*:*
- cpe:2.3:a:systemd_project:systemd:226:*:*:*:*:*:*:*
- cpe:2.3:a:systemd_project:systemd:227:*:*:*:*:*:*:*
- cpe:2.3:a:systemd_project:systemd:234:*:*:*:*:*:*:*
- cpe:2.3:a:systemd_project:systemd:235:*:*:*:*:*:*:*
- cpe:2.3:a:systemd_project:systemd:223:*:*:*:*:*:*:*
- cpe:2.3:a:systemd_project:systemd:224:*:*:*:*:*:*:*
- cpe:2.3:a:systemd_project:systemd:225:*:*:*:*:*:*:*
- cpe:2.3:a:systemd_project:systemd:232:*:*:*:*:*:*:*
- cpe:2.3:a:systemd_project:systemd:233:*:*:*:*:*:*:*
- cpe:2.3:a:systemd_project:systemd:230:*:*:*:*:*:*:*
- cpe:2.3:a:systemd_project:systemd:231:*:*:*:*:*:*:*