Debian update for lighttpd

1) Out-of-bounds read

EUVDB-ID: #VU59537

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 - Out-of-bounds read

Exploit availability: No

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

Update lighttpd package to one of the following versions: 1.4.53-4+deb10u2, 1.4.59-1+deb11u1.

Vulnerable software versions

lighttpd (Debian package): 1.4.7-1 - 1.4.57-1

CPE2.3

• cpe:2.3:a:debian:lighttpd_debian_package:1.4.7-1:*:*:*:*:debian_linux:*:*
• cpe:2.3:a:debian:lighttpd_debian_package:1.4.8-1:*:*:*:*:debian_linux:*:*
• cpe:2.3:a:debian:lighttpd_debian_package:1.4.8-2:*:*:*:*:debian_linux:*:*

External links

https://www.debian.org/security/2022/dsa-5040

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.