Is CVE-2015-1853 in the CISA KEV catalog?

No. CVE-2015-1853 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2015-1853?

CVE-2015-1853 has a CVSS v3 base score of 6.5 (MEDIUM).

What is the EPSS score for CVE-2015-1853?

CVE-2015-1853 has an EPSS score of 1.70% (74th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2015-1853?

Upgrade chrony on debian 11 to 1.30-2 or later.

CVE & CISA-KEV Catalog

CVE-2015-1853

MEDIUMEPSS 74th pctl

6.5

CVSS v3

NVD

Description

chrony before 1.31.1 does not properly protect state variables in authenticated symmetric NTP associations, which allows remote attackers with knowledge of NTP peering to cause a denial of service (inability to synchronize) via random timestamps in crafted NTP data packets.

How to fix

Remediation Available

chronyDebian

Fixed in:1.30-2CVE-2015-1853

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Exploit Intelligence

1.70%probability of exploitation in 30 days

74thpercentile

Elevated risk: more likely to be exploited than 74% of all known CVEs.

References

Vendor Advisory1

chrony.tuxfamily.org

Third-Party Advisory1

security.gentoo.org

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.