Ubuntu: 202303-15 High Threat: Nginx Denial Of Service Vulnerability

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