This vulnerability is 7 years 2 months and 24 days old there are exploits publicly available for it. The vulnerability itself is over a year old, and with there being exploits publicly available it is highly advisable that this vulnerability is patched immediately.
SynopsisThe web server running on the remote host is affected by a denial of service vulnerability.
Vulnerability DescriptionThe version of Apache HTTP Server running on the remote host is affected by a denial of service vulnerability. Making a series of HTTP requests with overlapping ranges in the Range or Request-Range request headers can result in memory and CPU exhaustion. A remote, unauthenticated attacker could exploit this to make the system unresponsive.
Exploit code is publicly available and attacks have reportedly been observed in the wild.
SolutionUpgrade to Apache httpd 2.2.21 or later. Alternatively, apply one of the workarounds in Apache's advisories for CVE-2011-3192. Version 2.2.20 fixed the issue, but it also introduced a regression.
If the host is running a web server based on Apache httpd, contact the vendor for a fix.
CVE ReferencesCVE-2011-3192 NIST | MITRE | CVEDetails
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