Buffer overflow in Lighttpd
CVE-2022-22707
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.
Vulnerability class: Buffer Overflow
EPSS: 0.090 (94.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Lighttpd
- Debian Debian_linux — versions 10.0, 11.0
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cve@mitre.org (Exploit, x_refsource_MISC, Vendor Advisory)
- cve@mitre.org (vendor-advisory, Third Party Advisory, x_refsource_DEBIAN)
Frequently asked questions
- What is CVE-2022-22707?
- CVE-2022-22707 is a medium-severity vulnerability in Lighttpd, classified under Out-of-bounds Write. CVSS score: 5.9/10. Published 2022-01-06.
- How severe is CVE-2022-22707?
- Medium severity. CVSS v3 base score is 5.9 out of 10.
- Is CVE-2022-22707 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.