What’s Vulnerable › Vulnerabilities

CVE-2017-11368

• Severity: medium (CVSS 6.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2017-08-09 · updated 2026-06-17
• Weakness: CWE-617

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.

Affected products

• Fedoraproject Fedora: 25, 26
• MIT Kerberos: 5-1.13.7
• MIT Kerberos 5: 1.7, 1.7.1, 1.8, 1.8.1, 1.8.2, 1.8.3 (+42)

References

• http://www.securityfocus.com/bid/100291
• https://access.redhat.com/errata/RHSA-2018:0666
• https://github.com/krb5/krb5/commit/ffb35baac6981f9e8914f8f3bffd37f284b85970
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4HNWXM6OQU7G23MG7XWIOBRGP43ECLDT/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UBUTXMNZWMVJLQ4NDX5OQFPUVCJRLV3W/
• http://www.securityfocus.com/bid/100291
• https://access.redhat.com/errata/RHSA-2018:0666
• https://github.com/krb5/krb5/commit/ffb35baac6981f9e8914f8f3bffd37f284b85970
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4HNWXM6OQU7G23MG7XWIOBRGP43ECLDT/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UBUTXMNZWMVJLQ4NDX5OQFPUVCJRLV3W/

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