PT-2017-3338 · Apache+5 · Apache Http Server+5
Eddie Zhu
·
Published
2017-09-18
·
Updated
2026-01-29
·
CVE-2017-9798
CVSS v3.1
7.5
High
| Vector | AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
Name of the Vulnerable Software and Affected Versions
Apache HTTP Server versions 2.2.0 through 2.2.34
Apache HTTP Server versions 2.4.0 through 2.4.27
Description
The issue allows remote attackers to read secret data from process memory under certain conditions, such as when the Limit directive can be set in a user's .htaccess file or if httpd.conf has specific misconfigurations. Attackers send an unauthenticated OPTIONS HTTP request to attempt to read secret data. This is a use-after-free issue, meaning secret data is not always sent, and the specific data depends on various factors including configuration.
Recommendations
For Apache HTTP Server versions 2.2.0 through 2.2.34, apply a patch to the ap limit section function in server/core.c to block exploitation with .htaccess.
For Apache HTTP Server versions 2.4.0 through 2.4.27, apply a patch to the ap limit section function in server/core.c to block exploitation with .htaccess.
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
Use After Free
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Weakness Enumeration
Related Identifiers
Affected Products
Alt Linux
Apache Http Server
Centos
Red Hat
Suse
Ubuntu