// For flags

CVE-2020-3516

Cisco IOS XE Software Web UI Improper Input Validation Vulnerability

Severity Score

4.3
*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 web server authentication of Cisco IOS XE Software could allow an authenticated, remote attacker to crash the web server on the device. The vulnerability is due to insufficient input validation during authentication. An attacker could exploit this vulnerability by entering unexpected characters during a valid authentication. A successful exploit could allow the attacker to crash the web server on the device, which must be manually recovered by disabling and re-enabling the web server.

Una vulnerabilidad en la autenticación del servidor web de Cisco IOS XE Software, podría permitir a un atacante remoto autenticado bloquear el servidor web en el dispositivo. La vulnerabilidad es debido a una comprobación insuficiente de la entrada durante la autenticación. Un atacante podría explotar esta vulnerabilidad mediante el ingreso de caracteres inesperados durante una autenticación válida. Una explotación con éxito podría permitir al atacante bloquear el servidor web en el dispositivo, que debe ser recuperado manualmente al deshabilitarlo y volviendo a habilitar el servidor web.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low
Attack Vector
Network
Attack Complexity
Low
Authentication
Single
Confidentiality
None
Integrity
None
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:Track
Exploitation
None
Automatable
No
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2019-12-12 CVE Reserved
  • 2020-09-24 CVE Published
  • 2023-12-27 EPSS Updated
  • 2024-11-13 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
Cisco
Search vendor "Cisco"
 Ios Xe
Search vendor "Cisco" for product "Ios Xe"
 < 16.9.6
Search vendor "Cisco" for product "Ios Xe" and version " < 16.9.6"
-
Affected
Cisco
Search vendor "Cisco"
 Ios Xe
Search vendor "Cisco" for product "Ios Xe"
 >= 16.12.0 < 16.12.2
Search vendor "Cisco" for product "Ios Xe" and version " >= 16.12.0 < 16.12.2"
-
Affected
Cisco
Search vendor "Cisco"
 Ios Xe
Search vendor "Cisco" for product "Ios Xe"
 >= 17.1.0 < 17.1.1
Search vendor "Cisco" for product "Ios Xe" and version " >= 17.1.0 < 17.1.1"
-
Affected
Cisco
Search vendor "Cisco"
 Ios Xe
Search vendor "Cisco" for product "Ios Xe"
 17.2.1
Search vendor "Cisco" for product "Ios Xe" and version "17.2.1"
-
Affected