CVE-2019-11072
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 H...
Affects 1 product across 1 vendor.
Arithmetic operation exceeds the maximum integer value, wrapping around and often leading to undersized allocations.
Mapping is CWE-to-CAPEC per MITRE CAPEC 3.9.
This vulnerability was disclosed in 2019. A critical vulnerability affects Lighttpd systems (CVE-2019-11072). No public exploit code is currently available. Isolate affected systems if patching is not feasible.
BSID: BS-2019-GLOBAL-133742-C • Model: rule-based-v1 • Confidence: MEDIUM
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| CVE ID | CVE-2019-11072 |
|---|---|
| BSID | BS-2019-GLOBAL-133742-C BreachSpider Global ID |
| CVSS Vector | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| Published | 2019-04-10 |
| Last Modified | 2026-06-17 |
| ICS Relevance | 0% |
| Weakness (CWE) | |
| Source | NVD |
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.
Source: NIST NVD / MITRE CVE Database
Vulnerability details: 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 CVSS vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Exploitation Likelihood: LOW
| Vendor | Product | Fixed Version |
|---|---|---|
| Lighttpd | Lighttpd | — |
| CISA KEV | Not in KEV catalog |
|---|---|
| Public Exploit | Not confirmed |
| PoC Code | Not confirmed |
SAGE Enrichment Record — provenance & audit hash
| Model | rule-based-v1 |
|---|---|
| Confidence | MEDIUM |
| Enriched At | 2026-05-24 |
| SHA-512 Audit Hash | b299fd8cbf36b91a7d779bc06ec2a287ad49644b2b3b983ee49ce4ff404b074a282c433cd6860df929b0df695667e5319f3a617fbdf75ab10e97da1e48f5d517 |
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