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Vulnerability record · CVE-2017-12171 · published 26 July 2018

CVE-2017-12171: Redhat enterprise linux improper access control vulnerability

Redhat · Enterprise Linux

A regression was found in the Red Hat Enterprise Linux 6.9 version of httpd 2.2.15-60, causing comments in the "Allow" and "Deny" configuration lines to be parsed incorrectly. A web administrator could unintentionally allow any client to access a restricted HTTP resource.

6.5 CVSS 3.0 Medium EPSS 8.1% · top 5.4% CWE-284 · Improper access controlCWE-20 · Improper input validation
6.5CVSS 3.0 base score, v2 6.4
8.1%EPSS exploitation probability, 30 days
NoNot in CISA KEV
5Affected product versions listed by NVD
8References
17 Jun 2026Last modified by NVD

Description

A regression was found in the Red Hat Enterprise Linux 6.9 version of httpd 2.2.15-60, causing comments in the "Allow" and "Deny" configuration lines to be parsed incorrectly. A web administrator could unintentionally allow any client to access a restricted HTTP resource.

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

Affected products

5 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.securityfocus.com/bid/101516 Broken LinkThird Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1039633 Third Party AdvisoryVDB Entry
https://access.redhat.com/errata/RHSA-2017:2972 Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-12171 Issue TrackingVendor Advisory
http://www.securityfocus.com/bid/101516 Broken LinkThird Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1039633 Third Party AdvisoryVDB Entry
https://access.redhat.com/errata/RHSA-2017:2972 Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-12171 Issue TrackingVendor Advisory

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Source: NIST National Vulnerability Database (record CVE-2017-12171), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.