CVE-2017-15908 Denial of service in n/a

What is CVE-2017-15908?

CVE-2017-15908 is a high-severity denial of service vulnerability in Canonical Ubuntu Linux, published on 26 Oct 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official 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.

Weakness: CWE-835

Which versions are affected by CVE-2017-15908?

It affects 2 products.

Products include Canonical Ubuntu Linux, Systemd Project Systemd.

How do I fix CVE-2017-15908?

Apply the vendor's patch.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2017-15908 being exploited?

There is no known exploitation of CVE-2017-15908 in the wild and no public exploit code.

Other vulnerabilities in Canonical Ubuntu Linux

• CVE-2020-11651 SaltStack Salt Authentication Bypass Exploited Critical 9.8
• CVE-2020-7247 OpenSMTPD Remote Code Execution Exploited Critical 9.8
• CVE-2019-16928 Exim Out-of-bounds Write Exploited Critical 9.8
• CVE-2018-6789 Exim Buffer Overflow Exploited Critical 9.8
• CVE-2015-2590 Oracle Java SE and Java SE Embedded Remote Code Execution Exploited Critical 9.8

All Canonical Ubuntu Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2017-15908, GHSA-7jr2-6c89-rmhp, MGASA-2018-0058, UBUNTU-CVE-2017-15908.