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Apache HTTP Server DoS Vulnerability (Sep 2011) - Linux
Information
Severity
Severity
Medium
Family
Family
Web Servers
CVSSv2 Base
CVSSv2 Base
4.3
CVSSv2 Vector
CVSSv2 Vector
AV:N/AC:M/Au:N/C:N/I:N/A:P
Solution Type
Solution Type
Vendor Patch
Created
Created
2 years ago
Modified
Modified
2 years ago
Summary
Apache HTTP Server is prone to a denial of service (DoS) vulnerability.
Insight
Insight
A flaw was found when mod_proxy_ajp is used together with mod_proxy_balancer. Given a specific configuration, a remote attacker could send certain malformed HTTP requests, putting a backend server into an error state until the retry timeout expired. This could lead to a temporary denial of service.
Affected Software
Affected Software
Apache HTTP Server version 2.2.12 through 2.2.20.
Detection Method
Detection Method
Checks if a vulnerable version is present on the target host.
Solution
Solution
Update to version 2.2.21 or later.