CVE-2017-9788 Information disclosure in Apache HTTP Server

What is CVE-2017-9788?

CVE-2017-9788 is a critical vulnerability in Apache Http Server, published on 13 Jul 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official 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.

Weakness: CWE-200, CWE-20

Which versions are affected by CVE-2017-9788?

It affects 15 products.

Products include Apache Http Server, Apple Mac Os X, Debian Debian Linux, Netapp Oncommand Unified Manager, Netapp Storage Automation Store, Oracle Secure Global Desktop and 9 more.

How do I fix CVE-2017-9788?

Upgrade to a fixed version.

Is CVE-2017-9788 being exploited?

There is no known exploitation of CVE-2017-9788 in the wild and no public exploit code.

Other vulnerabilities in Apache Http Server

• CVE-2021-42013 Apache HTTP Server Path Traversal Exploited Critical 9.8
• CVE-2024-38475 Apache HTTP Server Improper Escaping of Output Exploited Critical 9.1
• CVE-2021-40438 Apache HTTP Server-Side Request Forgery (SSRF) Exploited Critical 9.0
• CVE-2019-0211 Apache HTTP Server Privilege Escalation Exploited High 7.8
• CVE-2021-41773 Apache HTTP Server Path Traversal Exploited High 7.5

All Apache Http Server vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2017-9788, DLA-1028-1, DSA-3913-1, GHSA-w97h-p5ff-7q69, SUSE-SU-2017:1961-1, SUSE-SU-2017:1997-1 and 2 more.