CVE intelligence and bounded remediation

CVE-2015-5300 — Fedoraproject Fedora security vulnerability

High CVSS 7.5

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).

Severity
High
CVSS
7.5 (3.0)
Published
2017-07-21
CISA KEV
Not currently listed
Ecosystem
software/application
Weaknesses
CWE-361

Affected products

  • fedoraproject / fedora / 21
  • fedoraproject / fedora / 22
  • suse / linux_enterprise_debuginfo / 11
  • opensuse / leap / 42.1
  • opensuse / opensuse / 13.2
  • suse / linux_enterprise_desktop / 12

Showing 6 representative product identities from 38 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.

Matched remediation archetype

Resource exhaustion and denial of service

This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.

Check exposure

  • Identify attacker-influenced work factors including input size, nesting, compression, fan-out, regex cost, allocation, recursion, retries, and connection lifetime.
  • Map per-request and shared CPU, memory, disk, descriptor, thread, queue, and downstream-service limits.
  • Determine whether authentication, tenancy, quotas, and rate controls apply before expensive processing begins.

Remediate safely

  • Bound input size, nesting, expansion, work, concurrency, queue depth, retries, and execution time before resource-intensive processing.
  • Release resources on every success, error, cancellation, and timeout path and use backpressure instead of unbounded buffering.
  • Update affected components and add small deterministic tests that assert resource ceilings rather than exhausting a host.

Authoritative sources

Complete CVE record and remediation plan

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