CVE & CISA-KEV Catalog

CVE-2017-11368

MEDIUMEPSS 83th pctl
6.5
CVSS v3
NVD

Description

In MIT Kerberos 5 (aka krb5) 1.7 and later, an authenticated attacker can cause a KDC assertion failure by sending invalid S4U2Self or S4U2Proxy requests.

CWE-617

How to fix

Remediation Available
krb5-debuginfoAmazon
Fixed in:0:1.15.1-19.amzn2.0.1
krb5-develAmazon
Fixed in:0:1.15.1-19.amzn2.0.1
krb5-libsAmazon
Fixed in:0:1.15.1-19.amzn2.0.1
krb5-pkinitAmazon
Fixed in:0:1.15.1-19.amzn2.0.1
krb5-serverAmazon
Fixed in:0:1.15.1-19.amzn2.0.1
krb5-server-ldapAmazon
Fixed in:0:1.15.1-19.amzn2.0.1
krb5-workstationAmazon
Fixed in:0:1.15.1-19.amzn2.0.1
libkadm5Amazon
Fixed in:0:1.15.1-19.amzn2.0.1
krb5Debian
Fixed in:1.15.1-2CVE-2017-11368
Fixed in:1.15.1-2CVE-2017-11368
Fixed in:1.15.1-2CVE-2017-11368

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

Exploit Intelligence

2.40%probability of exploitation in 30 days
83rdpercentile

Elevated risk: more likely to be exploited than 83% of all known CVEs.

References

Third-Party Advisory1

Related Vulnerabilities

Other CWE-617 vulnerabilities, ordered by exploit likelihood. View all

CVESeverityCVSSEPSSExploitedFix
CVE-2020-8617High7.593%-Fix
CVE-2020-36222High7.578%-Fix
CVE-2006-5779High7.576%-Fix
CVE-2021-27212High7.564%-Fix
CVE-2018-5740High7.560%-Fix
CVE-2023-28425Medium5.555%-Fix

Common questions

How do I fix CVE-2017-11368?

Published advisories record a fix for 9 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.

Is CVE-2017-11368 being actively exploited?

Not that we know of. CVE-2017-11368 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 2.4% is the estimated probability that it will be exploited in the next 30 days. That is higher than 83% of all scored CVEs.

How severe is CVE-2017-11368?

CVE-2017-11368 has a CVSS v3 base score of 6.5, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2017-11368 affect?

Published advisories record a fix for krb5-debuginfo (Amazon), krb5-devel (Amazon), krb5-libs (Amazon), krb5-pkinit (Amazon), and 5 more. Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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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 2026-06-17.