Vulnerability identifier: #VU59537

Vulnerability risk: Medium

CVSSv3.1: 5.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-22707

CWE-ID: CWE-125

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
lighttpd
Server applications / Web servers

Vendor: lighttpd

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary condition in the mod_extforward_Forwarded function of the mod_extforward plugin. A remote attacker can send a specially crafted request to the web server, trigger an out-of-bounds read error and perform a denial of service attack.

Successful exploitation of the vulnerability requires a non-default configuration for handling of the Forwarded header.

Mitigation
Install update from vendor's website.

Vulnerable software versions

lighttpd: 1.4.46 - 1.4.63

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External links
http://redmine.lighttpd.net/issues/3134

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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.