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f5F5F5:K13114
HistorySep 12, 2013 - 12:00 a.m.

K13114 : Apache Range header vulnerability - CVE-2011-3192

2013-09-1200:00:00
my.f5.com
221

7.7 High

AI Score

Confidence

High

0.963 High

EPSS

Percentile

99.6%

Security Advisory Description

The byte-range filter in the Apache HTTP Server 1.3.x, 2.0.x through 2.0.64, and 2.2.x through 2.2.19 allows remote attackers to cause a denial-of-service (memory and CPU consumption) using a** Range** header that expresses multiple overlapping ranges.

When this vulnerability is exploited, the httpd process consumes all available CPU cycles. As a result of CPU starvation, the Configuration utility, SSH sessions, and other userland processes may appear extremely slow or completely unresponsive. On BIG-IP systems, if the system hardware watchdog timer is not updated for more than 10 seconds, the hardware watchdog restarts the system.

Impact

The performance of userland processes may be severely impaired, and the system may eventually reboot.