// For flags

CVE-2021-1145

Cisco StarOS for Cisco ASR 5000 Series Routers Arbitrary File Read Vulnerability

Severity Score

6.5
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Track
*SSVC
Descriptions

A vulnerability in the Secure FTP (SFTP) of Cisco StarOS for Cisco ASR 5000 Series Routers could allow an authenticated, remote attacker to read arbitrary files on an affected device. To exploit this vulnerability, the attacker would need to have valid credentials on the affected device. The vulnerability is due to insecure handling of symbolic links. An attacker could exploit this vulnerability by sending a crafted SFTP command to an affected device. A successful exploit could allow the attacker to read arbitrary files on the affected device.

Una vulnerabilidad en los Enrutadores Secure FTP (SFTP) de Cisco StarOS para Cisco ASR 5000 Series, podría permitir a un atacante autenticado remoto leer archivos arbitrarios en un dispositivo afectado. Para explotar esta vulnerabilidad, el atacante debería tener credenciales válidas en el dispositivo afectado. La vulnerabilidad es debido al manejo no seguro de enlaces simbólicos. Un atacante podría explotar esta vulnerabilidad mediante el envío de un comando SFTP diseñado hacia un dispositivo afectado. Una explotación con éxito podría permitir al atacante leer archivos arbitrarios en el dispositivo afectado.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None
Attack Vector
Network
Attack Complexity
Low
Authentication
Single
Confidentiality
Partial
Integrity
None
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:Track
Exploitation
None
Automatable
No
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2020-11-13 CVE Reserved
  • 2021-01-13 CVE Published
  • 2024-09-30 EPSS Updated
  • 2024-11-12 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-59: Improper Link Resolution Before File Access ('Link Following')
  • CWE-61: UNIX Symbolic Link (Symlink) Following
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Cisco
Search vendor "Cisco"
 Staros
Search vendor "Cisco" for product "Staros"
 < 21.19.7
Search vendor "Cisco" for product "Staros" and version " < 21.19.7"
-
Affected
in Cisco
Search vendor "Cisco"
 Asr 5000
Search vendor "Cisco" for product "Asr 5000"
--
Safe
Cisco
Search vendor "Cisco"
 Staros
Search vendor "Cisco" for product "Staros"
 < 21.19.7
Search vendor "Cisco" for product "Staros" and version " < 21.19.7"
-
Affected
in Cisco
Search vendor "Cisco"
 Asr 5500
Search vendor "Cisco" for product "Asr 5500"
--
Safe
Cisco
Search vendor "Cisco"
 Staros
Search vendor "Cisco" for product "Staros"
 < 21.19.7
Search vendor "Cisco" for product "Staros" and version " < 21.19.7"
-
Affected
in Cisco
Search vendor "Cisco"
 Asr 5700
Search vendor "Cisco" for product "Asr 5700"
--
Safe