CVE-2017-11368

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.

Published: 2017-08-09 Last update: 2026-05-13 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2017-11368 is rated Moderate Risk (50.3/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.68%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2017-11368

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-12-09 1.17% 0.68% -0.49%
2 2025-11-17 0.53% 1.17% +0.64%
3 2025-11-11 — 0.53% —

Full EPSS history (12 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2017-11368

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.5 3.0 MEDIUM
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 3.6 [email protected]
4.0 2.0 MEDIUM
AV:N/AC:L/Au:S/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:S)
A single authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.0 2.9 [email protected]

Weakness enumeration for CVE-2017-11368

OS Trackers for CVE-2017-11368

vendor priority summary link
debian not yet assigned CVE-2017-11368 not yet assigned priority: Debian including 1 source packages (krb5), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2017-11368
redhat medium — https://access.redhat.com/security/cve/CVE-2017-11368
suse medium CVE-2017-11368 severity moderate: SUSE including 352 source package names (amazon/suse-sles-15-sp1-chost-byos-v20210304-hvm-ssd-x86_64, amazon/suse-sles-15-sp1-chost-byos-v20220127-hvm-ssd-x86_64, …), 418 product×package rows across 44 product lines (Magnum Orchestration 7, SUSE Liberty Linux 7, … (44 product lines)): Fixed 198, Known Affected 157, Known Not Affected 63. https://www.suse.com/security/cve/CVE-2017-11368/
ubuntu medium CVE-2017-11368 medium priority: Ubuntu including 1 source packages (krb5), 12 status rows across 12 suites (artful, bionic, cosmic, disco, eoan, focal, groovy, hirsute, trusty, upstream, xenial, zesty): not-affected 8, released 3, ignored 1. https://ubuntu.com/security/CVE-2017-11368

Affected software / configurations for CVE-2017-11368

Vendor Product Version Raw CPE
fedoraproject fedora 25 cpe:2.3:o:fedoraproject:fedora:25:*:*:*:*:*:*:*
fedoraproject fedora 26 cpe:2.3:o:fedoraproject:fedora:26:*:*:*:*:*:*:*
mit kerberos 5-1.13.7 cpe:2.3:a:mit:kerberos:5-1.13.7:*:*:*:*:*:*:*
mit kerberos_5 1.7 cpe:2.3:a:mit:kerberos_5:1.7:*:*:*:*:*:*:*
mit kerberos_5 1.7.1 cpe:2.3:a:mit:kerberos_5:1.7.1:*:*:*:*:*:*:*
mit kerberos_5 1.8 cpe:2.3:a:mit:kerberos_5:1.8:*:*:*:*:*:*:*
mit kerberos_5 1.8.1 cpe:2.3:a:mit:kerberos_5:1.8.1:*:*:*:*:*:*:*
mit kerberos_5 1.8.2 cpe:2.3:a:mit:kerberos_5:1.8.2:*:*:*:*:*:*:*
mit kerberos_5 1.8.3 cpe:2.3:a:mit:kerberos_5:1.8.3:*:*:*:*:*:*:*
mit kerberos_5 1.8.4 cpe:2.3:a:mit:kerberos_5:1.8.4:*:*:*:*:*:*:*
mit kerberos_5 1.8.5 cpe:2.3:a:mit:kerberos_5:1.8.5:*:*:*:*:*:*:*
mit kerberos_5 1.8.6 cpe:2.3:a:mit:kerberos_5:1.8.6:*:*:*:*:*:*:*
mit kerberos_5 1.9 cpe:2.3:a:mit:kerberos_5:1.9:*:*:*:*:*:*:*
mit kerberos_5 1.9.1 cpe:2.3:a:mit:kerberos_5:1.9.1:*:*:*:*:*:*:*
mit kerberos_5 1.9.2 cpe:2.3:a:mit:kerberos_5:1.9.2:*:*:*:*:*:*:*
mit kerberos_5 1.9.3 cpe:2.3:a:mit:kerberos_5:1.9.3:*:*:*:*:*:*:*
mit kerberos_5 1.9.4 cpe:2.3:a:mit:kerberos_5:1.9.4:*:*:*:*:*:*:*
mit kerberos_5 1.10 cpe:2.3:a:mit:kerberos_5:1.10:*:*:*:*:*:*:*
mit kerberos_5 1.10.1 cpe:2.3:a:mit:kerberos_5:1.10.1:*:*:*:*:*:*:*
mit kerberos_5 1.10.2 cpe:2.3:a:mit:kerberos_5:1.10.2:*:*:*:*:*:*:*
mit kerberos_5 1.10.3 cpe:2.3:a:mit:kerberos_5:1.10.3:*:*:*:*:*:*:*
mit kerberos_5 1.10.4 cpe:2.3:a:mit:kerberos_5:1.10.4:*:*:*:*:*:*:*
mit kerberos_5 1.11 cpe:2.3:a:mit:kerberos_5:1.11:*:*:*:*:*:*:*
mit kerberos_5 1.11.1 cpe:2.3:a:mit:kerberos_5:1.11.1:*:*:*:*:*:*:*
mit kerberos_5 1.11.2 cpe:2.3:a:mit:kerberos_5:1.11.2:*:*:*:*:*:*:*
mit kerberos_5 1.11.3 cpe:2.3:a:mit:kerberos_5:1.11.3:*:*:*:*:*:*:*
mit kerberos_5 1.11.4 cpe:2.3:a:mit:kerberos_5:1.11.4:*:*:*:*:*:*:*
mit kerberos_5 1.11.5 cpe:2.3:a:mit:kerberos_5:1.11.5:*:*:*:*:*:*:*
mit kerberos_5 1.12 cpe:2.3:a:mit:kerberos_5:1.12:*:*:*:*:*:*:*
mit kerberos_5 1.12.1 cpe:2.3:a:mit:kerberos_5:1.12.1:*:*:*:*:*:*:*
mit kerberos_5 1.12.2 cpe:2.3:a:mit:kerberos_5:1.12.2:*:*:*:*:*:*:*
mit kerberos_5 1.12.3 cpe:2.3:a:mit:kerberos_5:1.12.3:*:*:*:*:*:*:*
mit kerberos_5 1.13 cpe:2.3:a:mit:kerberos_5:1.13:*:*:*:*:*:*:*
mit kerberos_5 1.13.1 cpe:2.3:a:mit:kerberos_5:1.13.1:*:*:*:*:*:*:*
mit kerberos_5 1.13.2 cpe:2.3:a:mit:kerberos_5:1.13.2:*:*:*:*:*:*:*
mit kerberos_5 1.13.3 cpe:2.3:a:mit:kerberos_5:1.13.3:*:*:*:*:*:*:*
mit kerberos_5 1.13.5 cpe:2.3:a:mit:kerberos_5:1.13.5:*:*:*:*:*:*:*
mit kerberos_5 1.13.6 cpe:2.3:a:mit:kerberos_5:1.13.6:*:*:*:*:*:*:*
mit kerberos_5 1.14 cpe:2.3:a:mit:kerberos_5:1.14:*:*:*:*:*:*:*
mit kerberos_5 1.14 cpe:2.3:a:mit:kerberos_5:1.14:alpha1:*:*:*:*:*:*
mit kerberos_5 1.14 cpe:2.3:a:mit:kerberos_5:1.14:beta1:*:*:*:*:*:*
mit kerberos_5 1.14 cpe:2.3:a:mit:kerberos_5:1.14:beta2:*:*:*:*:*:*
mit kerberos_5 1.14.1 cpe:2.3:a:mit:kerberos_5:1.14.1:*:*:*:*:*:*:*
mit kerberos_5 1.14.2 cpe:2.3:a:mit:kerberos_5:1.14.2:*:*:*:*:*:*:*
mit kerberos_5 1.14.3 cpe:2.3:a:mit:kerberos_5:1.14.3:*:*:*:*:*:*:*
mit kerberos_5 1.14.4 cpe:2.3:a:mit:kerberos_5:1.14.4:*:*:*:*:*:*:*
mit kerberos_5 1.14.5 cpe:2.3:a:mit:kerberos_5:1.14.5:*:*:*:*:*:*:*
mit kerberos_5 1.15 cpe:2.3:a:mit:kerberos_5:1.15:*:*:*:*:*:*:*
mit kerberos_5 1.15.1 cpe:2.3:a:mit:kerberos_5:1.15.1:*:*:*:*:*:*:*
mit kerberos_5 1.15.1 cpe:2.3:a:mit:kerberos_5:1.15.1:beta1:*:*:*:*:*:*
mit kerberos_5 1.15.1 cpe:2.3:a:mit:kerberos_5:1.15.1:beta2:*:*:*:*:*:*

References for CVE-2017-11368

cvelogic Threat Intelligence