// For flags

CVE-2023-26438

 

Severity Score

3.1
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

External service lookups for a number of protocols were vulnerable to a time-of-check/time-of-use (TOCTOU) weakness, involving the JDK DNS cache. Attackers that were timing DNS cache expiry correctly were able to inject configuration that would bypass existing network deny-lists. Attackers could exploit this weakness to discover the existence of restricted network infrastructure and service availability. Improvements were made to include deny-lists not only during the check of the provided connection data, but also during use. No publicly available exploits are known.

Las búsquedas de servicios externos para una serie de protocolos eran vulnerables a una debilidad de condición de carrera de tiempo de comprobación/tiempo de uso (TOCTOU), que afectaba a JDK DNS Cache. Los atacantes que sincronizaban correctamente la expiración de la caché DNS podían inyectar una configuración que eludía las listas de denegación de red existentes. Los atacantes podían explotar esta debilidad para descubrir la existencia de una infraestructura de red restringida y la disponibilidad del servicio. Se introdujeron mejoras para incluir de denegación no sólo durante la comprobación de los datos de conexión proporcionados, sino también durante el uso. No se conocen exploits disponibles públicamente.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None
Attack Vector
Network
Attack Complexity
High
Authentication
Single
Confidentiality
Partial
Integrity
None
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2023-02-22 CVE Reserved
  • 2023-08-02 CVE Published
  • 2024-08-02 CVE Updated
  • 2024-08-08 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition
  • CWE-918: Server-Side Request Forgery (SSRF)
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Open-xchange
Search vendor "Open-xchange"
 Open-xchange Appsuite Backend
Search vendor "Open-xchange" for product "Open-xchange Appsuite Backend"
 7.10.6
Search vendor "Open-xchange" for product "Open-xchange Appsuite Backend" and version "7.10.6"
-
Affected
Open-xchange
Search vendor "Open-xchange"
 Open-xchange Appsuite Backend
Search vendor "Open-xchange" for product "Open-xchange Appsuite Backend"
 8.10.0
Search vendor "Open-xchange" for product "Open-xchange Appsuite Backend" and version "8.10.0"
-
Affected