CVE-2015-5300

CVE-2015-5300 is a high-severity vulnerability in Redhat Enterprise Linux Desktop with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-361.

Key facts

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).

Frequently asked questions

What is CVE-2015-5300?
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).
How severe is CVE-2015-5300?
CVE-2015-5300 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2015-5300 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 9% (95th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-5300?
CVE-2015-5300 primarily affects Redhat Enterprise Linux Desktop. In total, 38 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2015-5300?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2015-5300 published?
CVE-2015-5300 was published on 2017-07-21 and last updated on 2026-06-17.

References

Affected products (38)

More vulnerabilities in Redhat Enterprise Linux Desktop

All CVEs affecting Redhat Enterprise Linux Desktop →

Other CWE-361 vulnerabilities

Browse all CWE-361 vulnerabilities →

Threat intelligence

Threat-intel indicators referencing this CVE: