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CVE-2017-9788

9.1 · CRITICAL

In Apache httpd before 2.2.34 and 2.4.x before 2.4.27, the value placeholder in [Proxy-]Authorization headers of type 'Digest' was not initialized or reset before or between successive key=value as…

Published Jul 13, 2017CWE-20EPSS 56.77%

Overview

CVE-2017-9788 is a critical-severity vulnerability. It was published on July 13, 2017 and has a CVSS 3.0 base score of 9.1 (CRITICAL).

This vulnerability has a CVSS 3.0 base score of 9.1, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

In Apache httpd before 2.2.34 and 2.4.x before 2.4.27, the value placeholder in [Proxy-]Authorization headers of type 'Digest' was not initialized or reset before or between successive key=value assignments by mod_auth_digest. Providing an initial key with no '=' assignment could reflect the stale value of uninitialized pool memory used by the prior request, leading to leakage of potentially confidential information, and a segfault in other cases resulting in denial of service.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refwww.debian.org/security/2017/dsa-3913Refwww.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.htmlRefwww.securityfocus.com/bid/99569Refwww.securitytracker.com/id/1038906Refaccess.redhat.com/errata/RHSA-2017:2478Refaccess.redhat.com/errata/RHSA-2017:2479Refaccess.redhat.com/errata/RHSA-2017:2483Refaccess.redhat.com/errata/RHSA-2017:2708Refaccess.redhat.com/errata/RHSA-2017:2709Refaccess.redhat.com/errata/RHSA-2017:2710

How CyberStrike helps

Frequently asked questions

What is CVE-2017-9788?

CVE-2017-9788 is a critical-severity vulnerability. It was published on July 13, 2017 and has a CVSS 3.0 base score of 9.1 (CRITICAL).

How severe is CVE-2017-9788?

This vulnerability has a CVSS 3.0 base score of 9.1, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2017-9788?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2017-9788?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2017-9788 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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