CVE-2022-22707

Severity: medium (CVSS 5.9 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 9.6% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2022-01-06 · updated 2026-06-17
Weakness: CWE-787

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.

Affected products

Debian Linux: 10.0, 11.0
lighttpd: from 1.4.46 through 1.4.63

References

https://redmine.lighttpd.net/issues/3134
https://www.debian.org/security/2022/dsa-5040
https://redmine.lighttpd.net/issues/3134
https://www.debian.org/security/2022/dsa-5040

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