Denial of service in Apache HTTP Server

Published: 2016-12-15 | Updated: 2018-03-13
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2016-8612
Exploitation vector Local network
Public exploit N/A
Vulnerable software
Apache HTTP Server
Server applications / Web servers

Vendor Apache Foundation

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Improper input validation

EUVDB-ID: #VU10953

Risk: Low

CVSSv3.1: 3.8 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2016-8612

CWE-ID: CWE-20 - Improper Input Validation

Exploit availability: No


The vulnerability allows an adjacent unauthenticated attacker to cause DoS condition on the target system.

The weakness exists in the mod_cluster module due to improper input validation by the protocol parsing logic in the mod_cluster module. An adjacent attacker can send a specially crafted request, trigger a segmentation fault in the serving httpdprocess and cause the service to crash.


Update to version 2.4.23.

Vulnerable software versions

Apache HTTP Server: - 2.4.22

CPE2.3 External links

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.