// For flags

CVE-2023-43826

Apache Guacamole: Integer overflow in handling of VNC image buffers

Severity Score

8.8
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

Apache Guacamole 1.5.3 and older do not consistently ensure that values received from a VNC server will not result in integer overflow. If a user connects to a malicious or compromised VNC server, specially-crafted data could result in memory corruption, possibly allowing arbitrary code to be executed with the privileges of the running guacd process.

Users are recommended to upgrade to version 1.5.4, which fixes this issue.

Apache Guacamole 1.5.3 y anteriores no garantizan sistemáticamente que los valores recibidos de un servidor VNC no produzcan un desbordamiento de enteros. Si un usuario se conecta a un servidor VNC malicioso o comprometido, los datos especialmente manipulados podrían dañar la memoria, permitiendo posiblemente que se ejecute código arbitrario con los privilegios del proceso guacd en ejecución. Se recomienda a los usuarios actualizar a la versión 1.5.4, que soluciona este problema.

*Credits: Joseph Surin (Elttam), Matt Jones (Elttam)
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Local
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Network
Attack Complexity
High
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2023-09-25 CVE Reserved
  • 2023-12-19 CVE Published
  • 2024-08-02 CVE Updated
  • 2024-10-25 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-190: Integer Overflow or Wraparound
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Apache
Search vendor "Apache"
Guacamole
Search vendor "Apache" for product "Guacamole"
<= 1.5.3
Search vendor "Apache" for product "Guacamole" and version " <= 1.5.3"
-
Affected