CVE-2022-41720
Restricted file access on Windows in os and net/http
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
On Windows, restricted files can be accessed via os.DirFS and http.Dir. The os.DirFS function and http.Dir type provide access to a tree of files rooted at a given directory. These functions permit access to Windows device files under that root. For example, os.DirFS("C:/tmp").Open("COM1") opens the COM1 device. Both os.DirFS and http.Dir only provide read-only filesystem access. In addition, on Windows, an os.DirFS for the directory (the root of the current drive) can permit a maliciously crafted path to escape from the drive and access any path on the system. With fix applied, the behavior of os.DirFS("") has changed. Previously, an empty root was treated equivalently to "/", so os.DirFS("").Open("tmp") would open the path "/tmp". This now returns an error.
En Windows, se puede acceder a archivos restringidos a través de os.DirFS y http.Dir. La función os.DirFS y el tipo http.Dir brindan acceso a un árbol de archivos ubicados en un directorio determinado. Estas funciones permiten el acceso a archivos de dispositivos Windows bajo esa raíz. Por ejemplo, os.DirFS("C:/tmp").Open("COM1") abre el dispositivo COM1. Tanto os.DirFS como http.Dir solo brindan acceso al sistema de archivos de solo lectura. Además, en Windows, un os.DirFS para el directorio (la raíz de la unidad actual) puede permitir que una ruta creada con fines malintencionados escape de la unidad y acceda a cualquier ruta del sistema. Con la corrección aplicada, el comportamiento de os.DirFS("") ha cambiado. Anteriormente, una raíz vacía se trataba de manera equivalente a "/", por lo que os.DirFS("").Open("tmp") abriría la ruta "/tmp". Esto ahora devuelve un error.
CVSS Scores
SSVC
- Decision:-
Timeline
- 2022-09-28 CVE Reserved
- 2022-12-07 CVE Published
- 2024-06-29 EPSS Updated
- 2024-08-03 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
References (4)
| URL | Tag | Source |
|---|
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| https://go.dev/cl/455716 | 2022-12-12 | |
| https://groups.google.com/g/golang-announce/c/L_3rmdT0BMU/m/yZDrXjIiBQAJ | 2022-12-12 | |
| https://pkg.go.dev/vuln/GO-2022-1143 | 2022-12-12 |
| URL | Date | SRC |
|---|---|---|
| https://go.dev/issue/56694 | 2022-12-12 |
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Golang Search vendor "Golang" | Go Search vendor "Golang" for product "Go" | < 1.18.9 Search vendor "Golang" for product "Go" and version " < 1.18.9" | - |
Affected
| in | Microsoft Search vendor "Microsoft" | Windows Search vendor "Microsoft" for product "Windows" | - | - |
Safe
|
| Golang Search vendor "Golang" | Go Search vendor "Golang" for product "Go" | >= 1.19.0 < 1.19.4 Search vendor "Golang" for product "Go" and version " >= 1.19.0 < 1.19.4" | - |
Affected
| in | Microsoft Search vendor "Microsoft" | Windows Search vendor "Microsoft" for product "Windows" | - | - |
Safe
|