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CVE-2017-9798

Published: 18 September 2017

Apache httpd allows remote attackers to read secret data from process memory if the Limit directive can be set in a user's .htaccess file, or if httpd.conf has certain misconfigurations, aka Optionsbleed. This affects the Apache HTTP Server through 2.2.34 and 2.4.x through 2.4.27. The attacker sends an unauthenticated OPTIONS HTTP request when attempting to read secret data. This is a use-after-free issue and thus secret data is not always sent, and the specific data depends on many factors including configuration. Exploitation with .htaccess can be blocked with a patch to the ap_limit_section function in server/core.c.

Priority

Medium

CVSS 3 base score: 7.5

Status

Package Release Status
apache2
Launchpad, Ubuntu, Debian
Upstream Needs triage

Ubuntu 16.04 ESM (Xenial Xerus)
Released (2.4.18-2ubuntu3.5)
Ubuntu 14.04 ESM (Trusty Tahr)
Released (2.4.7-1ubuntu4.18)
Patches:
Upstream: https://svn.apache.org/viewvc?view=revision&revision=1807754