#VU59537 Out-of-bounds read in lighttpd - CVE-2022-22707

Vulnerability identifier: #VU59537

Vulnerability risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

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

---

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

---

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.