Is CVE-2018-6553 in the CISA KEV catalog?

No. CVE-2018-6553 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2018-6553?

CVE-2018-6553 has a CVSS v3 base score of 8.8 (HIGH).

What is the EPSS score for CVE-2018-6553?

CVE-2018-6553 has an EPSS score of 0.39% (30th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2018-6553?

Upgrade cups on debian 11 to 2.2.8-5 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2018-6553

HIGH

8.8

CVSS v3

NVD

Description

The CUPS AppArmor profile incorrectly confined the dnssd backend due to use of hard links. A local attacker could possibly use this issue to escape confinement. This flaw affects versions prior to 2.2.7-1ubuntu2.1 in Ubuntu 18.04 LTS, prior to 2.2.4-7ubuntu3.1 in Ubuntu 17.10, prior to 2.1.3-4ubuntu0.5 in Ubuntu 16.04 LTS, and prior to 1.7.2-0ubuntu1.10 in Ubuntu 14.04 LTS.

How to fix

Remediation Available

cupsDebian

Fixed in:2.2.8-5CVE-2018-6553

cupsUbuntu

Fixed in:1.7.2-0ubuntu1.10USN-3713-1

Fixed in:2.1.3-4ubuntu0.5USN-3713-1

Fixed in:2.2.7-1ubuntu2.1USN-3713-1

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 VectorLocal

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeChanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Exploit Intelligence

0.39%probability of exploitation in 30 days

30thpercentile

Low risk: more likely to be exploited than 30% of all known CVEs.

References

Third-Party Advisory3

Other references1

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.