CVE-2017-3167

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 20.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2017-06-20 · updated 2026-06-17
Weakness: CWE-287

Description

In Apache httpd 2.2.x before 2.2.33 and 2.4.x before 2.4.26, use of the ap_get_basic_auth_pw() by third-party modules outside of the authentication phase may lead to authentication requirements being bypassed.

Affected products

Apache HTTP Server: from 2.2.0 before 2.2.33; from 2.4.0 before 2.4.26 — fixed in 2.2.33, 2.4.26
macOS: before 10.13.1 — fixed in 10.13.1
Debian Linux: 8.0, 9.0
Clustered Data ONTAP: all versions
NetApp OnCommand Unified Manager for 7-Mode (core package): all versions
NetApp StorageGRID: all versions
Oracle Corporation Secure Global Desktop: 5.3
RedHat Enterprise Linux Desktop: 6.0, 7.0
RedHat Enterprise Linux Eus: 6.7, 7.2, 7.3, 7.4, 7.5, 7.6 (+1)
RedHat Enterprise Linux Server: 6.0, 7.0
RedHat Enterprise Linux Server Aus: 7.2, 7.3, 7.4, 7.6, 7.7
RedHat Enterprise Linux Server Tus: 7.2, 7.3, 7.4, 7.6, 7.7
RedHat Enterprise Linux Workstation: 6.0, 7.0
RedHat Jboss Core Services: 1.0

How to fix

Upgrade to a fixed version: Apache HTTP Server 2.2.33, 2.4.26; macOS 10.13.1. Check the vendor advisory for mitigations.

References

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