CVE-2017-7562

At a glance

Severity: MEDIUM 6.5
EPSS: EPSS 3.18 % · percentile 88 (2026-10-27)
State: PUBLISHED
Published: 2018-07-26
Updated: 2024-08-05
Assigner: redhat
NVD status: Modified

Description

An authentication bypass flaw was found in the way krb5's certauth interface before 1.16.1 handled the validation of client certificates. A remote attacker able to communicate with the KDC could potentially use this flaw to impersonate arbitrary principals under rare and erroneous circumstances.

Scores

Version	Score	Vector	Scored by
CVSS 3.0	MEDIUM 6.5	CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N	redhat
CVSS 3.1	MEDIUM 6.5	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N	NVD · nvd@nist.gov (Primary)
CVSS 3.0	MEDIUM 6.5	CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N	NVD · secalert@redhat.com (Secondary)
CVSS 2.0	MEDIUM 4.0	AV:N/AC:L/Au:S/C:N/I:P/A:N	NVD · nvd@nist.gov (Primary)

Weaknesses (CWE)

European references

ENISA EUVD · EUVD-2017-16567
GCVE · GCVE-0-2017-7562

CERT-FR advisories

CERTFR-2022-AVI-267 — Multiples vulnérabilités dans Juniper Networks Junos Space · cert.ssi.gouv.fr

Affected configurations (NVD CPE)

cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*
cpe:2.3:a:mit:kerberos_5:*:*:*:*:*:*:*:* ≥ 1.0 < 1.16.1

Affected products

Product	Versions
MIT · krb5	affected 1.16.1

References

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)	Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD