Denial of Service Vulnerability in systemd by Red Hat
CVE-2017-15908

7.5HIGH

Key Information:

Vendor

Systemd Project

Status
Systemd
Vendor
CVE Published:
26 October 2017

What is CVE-2017-15908?

In systemd versions 223 through 235, a potential Denial of Service (DoS) vulnerability exists due to mishandling of DNS response records. An attacker can exploit this by sending a malformed DNS NSEC resource record to the dns_packet_read_type_window() function of the 'systemd-resolved' service, which may trigger an infinite loop. This can ultimately render the affected service inoperable, disrupting system functionalities that rely on DNS resolution.

References

http://www.securitytracker.com/id/1039662
vdb-entryx_refsource_SECTRACK
http://www.securityfocus.com/bid/101600
vdb-entryx_refsource_BID
https://github.com/systemd/systemd/pull/7184
x_refsource_CONFIRM

EPSS Score

23% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.