// For flags

CVE-2024-29180

webpack-dev-middleware Path Traversal vulnerability

Severity Score

7.4
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Track*
*SSVC
Descriptions

Prior to versions 7.1.0, 6.1.2, and 5.3.4, the webpack-dev-middleware development middleware for devpack does not validate the supplied URL address sufficiently before returning the local file. It is possible to access any file on the developer's machine. The middleware can either work with the physical filesystem when reading the files or it can use a virtualized in-memory `memfs` filesystem. If `writeToDisk` configuration option is set to `true`, the physical filesystem is used. The `getFilenameFromUrl` method is used to parse URL and build the local file path. The public path prefix is stripped from the URL, and the `unsecaped` path suffix is appended to the `outputPath`. As the URL is not unescaped and normalized automatically before calling the midlleware, it is possible to use `%2e` and `%2f` sequences to perform path traversal attack.

Developers using `webpack-dev-server` or `webpack-dev-middleware` are affected by the issue. When the project is started, an attacker might access any file on the developer's machine and exfiltrate the content. If the development server is listening on a public IP address (or `0.0.0.0`), an attacker on the local network can access the local files without any interaction from the victim (direct connection to the port). If the server allows access from third-party domains, an attacker can send a malicious link to the victim. When visited, the client side script can connect to the local server and exfiltrate the local files. Starting with fixed versions 7.1.0, 6.1.2, and 5.3.4, the URL is unescaped and normalized before any further processing.

Antes de las versiones 7.1.0, 6.1.2 y 5.3.4, el middleware de desarrollo webpack-dev-middleware para devpack no valida suficientemente la dirección URL proporcionada antes de devolver el archivo local. Es posible acceder a cualquier archivo en la máquina del desarrollador. El middleware puede funcionar con el sistema de archivos físico al leer los archivos o puede usar un sistema de archivos virtualizado en memoria "memfs". Si la opción de configuración `writeToDisk` está establecida en `true`, se utiliza el sistema de archivos físico. El método `getFilenameFromUrl` se utiliza para analizar la URL y crear la ruta del archivo local. El prefijo de ruta pública se elimina de la URL y el sufijo de ruta "sin separar" se agrega a "outputPath". Como la URL no se elimina y se normaliza automáticamente antes de llamar al midlleware, es posible utilizar las secuencias `%2e` y `%2f` para realizar un ataque de path traversal. Los desarrolladores que utilizan `webpack-dev-server` o `webpack-dev-middleware` se ven afectados por el problema. Cuando se inicia el proyecto, un atacante podría acceder a cualquier archivo en la máquina del desarrollador y extraer el contenido. Si el servidor de desarrollo está escuchando en una dirección IP pública (o `0.0.0.0`), un atacante en la red local puede acceder a los archivos locales sin ninguna interacción por parte de la víctima (conexión directa al puerto). Si el servidor permite el acceso desde dominios de terceros, un atacante puede enviar un enlace malicioso a la víctima. Cuando se visita, el script del lado del cliente puede conectarse al servidor local y extraer los archivos locales. A partir de las versiones corregidas 7.1.0, 6.1.2 y 5.3.4, la URL no tiene escape y se normaliza antes de cualquier procesamiento posterior.

A flaw was found in the webpack-dev-middleware package, where it failed to validate the supplied URL address sufficiently before returning local files. This flaw allows an attacker to craft URLs to return arbitrary local files from the developer's machine. The lack of normalization before calling the middleware also allows the attacker to perform path traversal attacks on the target environment.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
High
Integrity
None
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:Track*
Exploitation
Poc
Automatable
No
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2024-03-18 CVE Reserved
  • 2024-03-21 CVE Published
  • 2024-03-22 EPSS Updated
  • 2024-08-02 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Webpack
Search vendor "Webpack"
Webpack-dev-middleware
Search vendor "Webpack" for product "Webpack-dev-middleware"
>= 7.0.0 < 7.1.0
Search vendor "Webpack" for product "Webpack-dev-middleware" and version " >= 7.0.0 < 7.1.0"
en
Affected
Webpack
Search vendor "Webpack"
Webpack-dev-middleware
Search vendor "Webpack" for product "Webpack-dev-middleware"
>= 6.0.0 < 6.1.2
Search vendor "Webpack" for product "Webpack-dev-middleware" and version " >= 6.0.0 < 6.1.2"
en
Affected
Webpack
Search vendor "Webpack"
Webpack-dev-middleware
Search vendor "Webpack" for product "Webpack-dev-middleware"
< 5.3.4
Search vendor "Webpack" for product "Webpack-dev-middleware" and version " < 5.3.4"
en
Affected