CVE-2019-11072
highpriority · attend · 65EPSS 0.738 · 99 %ileEURUUSEPSS · scored 2026-10-27
lighttpd before 1.4.54 has a signed integer overflow, which might allow remote attackers to cause a denial of service (application crash) or possibly have unspecified other impact via a malicious HTTP GET request, as demonstrated by mishandling of /%2F? in burl_normalize_2F_to_slash_fix in burl.c. NOTE: The developer states "The feature which can be abused to cause the crash is a new feature in lighttpd 1.4.50, and is not enabled by default. It must be explicitly configured in the config file (e.g. lighttpd.conf). Certain input will trigger an abort() in lighttpd when that feature is enabled. lighttpd detects the underflow or realloc() will fail (in both 32-bit and 64-bit executables), also detected in lighttpd. Either triggers an explicit abort() by lighttpd. This is not exploitable beyond triggering the explicit abort() with subsequent application exit.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 7.5–9.8
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (7)
Products and version ranges known to be affected.
also known as (4)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (14)
External citations — patches, advisories, analysis.
- http://www.ligcnnvd
- http://www.securityfocus.com/bid/107907cnnvd
- https://github.com/ligcnnvd
- https://nvd.nist.gov/vuln/detail/CVE-2019-11072cnnvd
- https://redmine.ligcnnvd
- https://redmine.lighttpd.net/issues/2945Patchcnnvd
- https://vigilance.fr/vulnerability/ligcnnvd
- https://www.securityfocus.com/bid/107907cnnvd
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