🛡️ CVE-2022-22707 — debian-linux

🟡 CVSS 5.9 — Medium ⚠️ Exploit Public CWE-787 NVD
5.9
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

In lighttpd 1.4.46 through 1.4.63, the mod_extforward_Forwarded function of the mod_extforward plugin has a stack-based buffer overflow (4 bytes representing -1), as demonstrated by remote denial of service (daemon crash) in a non-default configuration. The non-default configuration requires handling of the Forwarded header in a somewhat unusual manner. Also, a 32-bit system is much more likely to be affected than a 64-bit system.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is high, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity none, availability high.

Weakness class

CVE-2022-22707 is classified as CWE-787: Out-of-bounds Write. Data is written past the end or before the start of a buffer, corrupting whatever is stored there.

Affected software

CVE-2022-22707 is recorded against 2 packages.

  • debian-linux
  • lighttpd (from 1.4.46 up to 1.4.63)

Timeline and source

Published on 6 January 2022 and last revised on 17 June 2026. A public exploit is known to exist, which raises the urgency of patching considerably. Record sourced from NVD.

References

redmine.lighttpd.net
www.debian.org
redmine.lighttpd.net
www.debian.org

CVE-2022-22707 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity MEDIUM
CVSS Score 5.9
CVSS Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE CWE-787
Public Exploit ⚠️ Yes
Source NVD
Published 2022-01-06
Updated 2026-08-11
Modified 2026-06-17
Fix URL N/A

Affected Packages

Software From version Fixed in
debian-linux — —
lighttpd 1.4.46 1.4.63

Similar Threats

Exploit Protection

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