CVE-2015-5300 Denial of service in n/a

What is CVE-2015-5300?

CVE-2015-5300 is a high-severity denial of service vulnerability in Canonical Ubuntu Linux, published on 21 Jul 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

The panic_gate check in NTP before 4.2.8p5 is only re-enabled after the first change to the system clock that was greater than 128 milliseconds by default, which allows remote attackers to set NTP to an arbitrary time when started with the -g option, or to alter the time by up to 900 seconds otherwise by responding to an unspecified number of requests from trusted sources, and leveraging a resulting denial of service (abort and restart).

Weakness: CWE-361

Which versions are affected by CVE-2015-5300?

It affects 20 products.

Products include Canonical Ubuntu Linux, Debian Debian Linux, Fedoraproject Fedora, Ntp Ntp, Opensuse Leap, Opensuse Opensuse and 14 more.

How do I fix CVE-2015-5300?

Upgrade to a fixed version.

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-2015-5300 being exploited?

There is no known exploitation of CVE-2015-5300 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-2015-5300, GHSA-28h7-c4wm-4753, UBUNTU-CVE-2015-5300.