[ASA-201807-12] apache: denial of service

[Jelle van der Waa]

Arch Linux Security Advisory ASA-201807-12
==========================================

Severity: Medium
Date    : 2018-07-20
CVE-ID  : CVE-2018-1333 CVE-2018-8011
Package : apache
Type    : denial of service
Remote  : Yes
Link    : https://security.archlinux.org/AVG-736

Summary
=======

The package apache before version 2.4.34-1 is vulnerable to denial of
service.

Resolution
==========

Upgrade to 2.4.34-1.

# pacman -Syu "apache>=2.4.34-1"

The problems have been fixed upstream in version 2.4.34.

Workaround
==========

None.

Description
===========

- CVE-2018-1333 (denial of service)

By specially crafting HTTP/2 requests, workers would be allocated 60
seconds longer than necessary, leading to worker exhaustion and a
denial of service.

- CVE-2018-8011 (denial of service)

By specially crafting HTTP requests, the mod_md challenge handler would
dereference a NULL pointer and cause the child process to segfault.
This could be used to DoS the server.

Impact
======

A remote attacker is able to cause a denial of service via a crafted
HTTP request.

References
==========

https://httpd.apache.org/security/vulnerabilities_24.html#CVE-2018-1333
https://httpd.apache.org/security/vulnerabilities_24.html#CVE-2018-8011
https://security.archlinux.org/CVE-2018-1333
https://security.archlinux.org/CVE-2018-8011
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