Is CVE-2017-6056 in the CISA KEV catalog?

No. CVE-2017-6056 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2017-6056?

CVE-2017-6056 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2017-6056?

CVE-2017-6056 has an EPSS score of 7.49% (94th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2017-6056?

Upgrade libtomcat7-java on ubuntu 14.04 to 7.0.52-1ubuntu0.10 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2017-6056

HIGHEPSS 94th pctl

7.5

CVSS v3

NVD

Description

It was discovered that a programming error in the processing of HTTPS requests in the Apache Tomcat servlet and JSP engine may result in denial of service via an infinite loop. The denial of service is easily achievable as a consequence of backporting a CVE-2016-6816 fix but not backporting the fix for Tomcat bug 57544. Distributions affected by this backporting issue include Debian (before 7.0.56-3+deb8u8 and 8.0.14-1+deb8u7 in jessie) and Ubuntu.

CWE-835

How to fix

Remediation Available

libtomcat7-javaUbuntu

Fixed in:7.0.52-1ubuntu0.10USN-3204-1

tomcat7Ubuntu

Fixed in:7.0.52-1ubuntu0.10USN-3204-1

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

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 RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

7.49%probability of exploitation in 30 days

94thpercentile

High risk: more likely to be exploited than 94% of all known CVEs.

References

Third-Party Advisory14

Other references3

Related Vulnerabilities

Other CWE-835 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2020-13935	High	7.5	88%	-	Fix
CVE-2020-36227	High	7.5	78%	-	Fix
CVE-2024-20353	High	8.6	71%	KEV	-
CVE-2022-0778	High	7.5	71%	-	Fix
CVE-2019-14241	High	7.5	70%	-	-
CVE-2017-16944	High	7.5	63%	-	Fix

Embed a live status badge for CVE-2017-6056

Markdown

[![CVE-2017-6056](https://tridentstack.com/cve/badge/CVE-2017-6056.svg)](https://tridentstack.com/cve/CVE-2017-6056)

HTML

<a href="https://tridentstack.com/cve/CVE-2017-6056"><img src="https://tridentstack.com/cve/badge/CVE-2017-6056.svg" alt="CVE-2017-6056"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

See how it works Start freeThis CVE lookup is free and always will be.

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 2026-05-13.