Vulnerability identifier: #VU11282

Vulnerability risk: Low

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-1283

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Apache HTTP Server
Server applications / Web servers

Vendor: Apache Foundation

Description
The vulnerability allows a remote attacker to modify data on the target system.

The weakness exists on systems with mod_session configured with SessionEnv on to forward session data to CGI applications due to improper input validation. A remote attacker can send a specially crafted 'Session' header value to potentially modify mod_session data.

Mitigation
Update to version 2.4.32.

Vulnerable software versions

Apache HTTP Server: 2.4.1 - 2.4.29

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External links
http://httpd.apache.org/security/vulnerabilities_24.html#CVE-2018-1283

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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