CVE-2023-46136
Werkzeug vulnerable to high resource usage when parsing multipart/form-data containing a large part with CR/LF character at the beginning
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
Werkzeug is a comprehensive WSGI web application library. If an upload of a file that starts with CR or LF and then is followed by megabytes of data without these characters: all of these bytes are appended chunk by chunk into internal bytearray and lookup for boundary is performed on growing buffer. This allows an attacker to cause a denial of service by sending crafted multipart data to an endpoint that will parse it. The amount of CPU time required can block worker processes from handling legitimate requests. This vulnerability has been patched in version 3.0.1.
Werkzeug es una librería completa de aplicaciones web WSGI. Si se carga un archivo que comienza con CR o LF y luego va seguido de megabytes de datos sin estos caracteres: todos estos bytes se agregan fragmento a fragmento en una matriz de bytes interna y la búsqueda de los límites se realiza en un búfer en crecimiento. Esto permite a un atacante provocar una denegación de servicio enviando datos multiparte manipulados a un endpoint que los analizará. La cantidad de tiempo de CPU necesaria puede impedir que los procesos de trabajo manejen solicitudes legítimas. Esta vulnerabilidad ha sido parcheada en la versión 3.0.1.
A resource consumption flaw was found in python-werkzeug. If a specially crafted file is uploaded by a remote attacker, it may cause a denial of service.
CVSS Scores
SSVC
- Decision:-
Timeline
- 2023-10-16 CVE Reserved
- 2023-10-24 CVE Published
- 2024-08-02 CVE Updated
- 2024-10-30 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-400: Uncontrolled Resource Consumption
- CWE-407: Inefficient Algorithmic Complexity
- CWE-787: Out-of-bounds Write
CAPEC
References (5)
| URL | Tag | Source |
|---|---|---|
| https://security.netapp.com/advisory/ntap-20231124-0008 | Third Party Advisory |
|
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| https://github.com/pallets/werkzeug/commit/f3c803b3ade485a45f12b6d6617595350c0f03e2 | 2024-01-10 |
| URL | Date | SRC |
|---|---|---|
| https://github.com/pallets/werkzeug/security/advisories/GHSA-hrfv-mqp8-q5rw | 2024-01-10 | |
| https://access.redhat.com/security/cve/CVE-2023-46136 | 2024-01-16 | |
| https://bugzilla.redhat.com/show_bug.cgi?id=2246310 | 2024-01-16 |
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Palletsprojects Search vendor "Palletsprojects" | Werkzeug Search vendor "Palletsprojects" for product "Werkzeug" | < 2.3.8 Search vendor "Palletsprojects" for product "Werkzeug" and version " < 2.3.8" | - |
Affected
| ||||||
| Palletsprojects Search vendor "Palletsprojects" | Werkzeug Search vendor "Palletsprojects" for product "Werkzeug" | 3.0.0 Search vendor "Palletsprojects" for product "Werkzeug" and version "3.0.0" | - |
Affected
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