// For flags

CVE-2020-12062

 

Severity Score

7.5
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

The scp client in OpenSSH 8.2 incorrectly sends duplicate responses to the server upon a utimes system call failure, which allows a malicious unprivileged user on the remote server to overwrite arbitrary files in the client's download directory by creating a crafted subdirectory anywhere on the remote server. The victim must use the command scp -rp to download a file hierarchy containing, anywhere inside, this crafted subdirectory. NOTE: the vendor points out that "this attack can achieve no more than a hostile peer is already able to achieve within the scp protocol" and "utimes does not fail under normal circumstances.

** EN DISPUTA** El cliente scp en OpenSSH versión 8.2 envía incorrectamente respuestas duplicadas al servidor tras un fallo en la llamada de sistema utimes, lo que permite a un usuario malicioso sin privilegios en el servidor remoto sobrescribir archivos arbitrarios en el directorio de descarga del cliente mediante la creación de un subdirectorio diseñado en cualquier lugar del servidor remoto. La víctima debe usar el comando scp -rp para descargar una jerarquía de archivos que contenga, en cualquier lugar de su interior, este subdirectorio creado. NOTA: el vendedor señala que "este ataque no puede lograr más de lo que un peer hostil ya se puede lograr dentro del protocolo scp" y "utimes no presenta un fallo bajo circunstancias normales".

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None
Attack Vector
Network
Attack Complexity
Low
Authentication
None
Confidentiality
None
Integrity
Partial
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2020-04-22 CVE Reserved
  • 2020-06-01 CVE Published
  • 2024-04-05 EPSS Updated
  • 2024-08-04 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-20: Improper Input Validation
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Openbsd
Search vendor "Openbsd"
Openssh
Search vendor "Openbsd" for product "Openssh"
8.2
Search vendor "Openbsd" for product "Openssh" and version "8.2"
-
Affected