// For flags

CVE-2023-34323

xenstored: A transaction conflict can crash C Xenstored

Severity Score

5.5
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

When a transaction is committed, C Xenstored will first check
the quota is correct before attempting to commit any nodes. It would
be possible that accounting is temporarily negative if a node has
been removed outside of the transaction.

Unfortunately, some versions of C Xenstored are assuming that the
quota cannot be negative and are using assert() to confirm it. This
will lead to C Xenstored crash when tools are built without -DNDEBUG
(this is the default).

Cuando se confirma una transacción, C Xenstored primero verificará que la cuota sea correcta antes de intentar confirmar cualquier nodo. Sería posible que la contabilidad fuera temporalmente negativa si se hubiera eliminado un nodo fuera de la transacción. Desafortunadamente, algunas versiones de C Xenstored asumen que la cuota no puede ser negativa y utilizan assert() para confirmarlo. Esto provocará un bloqueo de C Xenstored cuando las herramientas se creen sin -DNDEBUG (este es el valor predeterminado).

*Credits: This issue was discovered by Stanislav Uschakow and Julien Grall, all from Amazon.
CVSS Scores
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2023-06-01 CVE Reserved
  • 2024-01-05 CVE Published
  • 2024-01-10 EPSS Updated
  • 2024-08-02 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-476: NULL Pointer Dereference
CAPEC
References (1)
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Xen
Search vendor "Xen"
Xen
Search vendor "Xen" for product "Xen"
< 4.17.0
Search vendor "Xen" for product "Xen" and version " < 4.17.0"
-
Affected