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
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.089 (95.1th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 95th percentile — 95.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.090 · newest: 0.089 · change: -0.000
Affected products
- Lighttpd
- Debian Linux — versions 10.0, 11.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- redmine.lighttpd.net/issues/3134 (Exploit, Vendor Advisory)
- www.debian.org/security/2022/dsa-5040 (vendor-advisory, Third Party Advisory)
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.