// For flags

CVE-2024-40896

Ubuntu Security Notice USN-7215-1

Severity Score

9.1
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Attend
*SSVC
Descriptions

In libxml2 2.11 before 2.11.9, 2.12 before 2.12.9, and 2.13 before 2.13.3, the SAX parser can produce events for external entities even if custom SAX handlers try to override entity content (by setting "checked"). This makes classic XXE attacks possible.

En libxml2 2.11 anterior a 2.11.9, 2.12 anterior a 2.12.9 y 2.13 anterior a 2.13.3, el analizador SAX puede producir eventos para entidades externas incluso si los controladores SAX personalizados intentan anular el contenido de la entidad (estableciendo "marcado"). Esto hace posibles los ataques XXE clásicos.

Xisco Fauli discovered that libxml2 incorrectly handled custom SAX handlers. A remote attacker could possibly use this issue to perform XML External Entity attacks.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
High
Attack Vector
Network
Attack Complexity
Low
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:Attend
Exploitation
None
Automatable
Yes
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2024-07-12 CVE Reserved
  • 2024-12-23 CVE Published
  • 2024-12-24 CVE Updated
  • 2024-12-24 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-611: Improper Restriction of XML External Entity Reference
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Libxml2
Search vendor "Libxml2"
 Libxml2
Search vendor "Libxml2" for product "Libxml2"
 >= 2.11.0 < 2.11.9
Search vendor "Libxml2" for product "Libxml2" and version " >= 2.11.0 < 2.11.9"
en
Affected
Libxml2
Search vendor "Libxml2"
 Libxml2
Search vendor "Libxml2" for product "Libxml2"
 >= 2.12.0 < 2.12.9
Search vendor "Libxml2" for product "Libxml2" and version " >= 2.12.0 < 2.12.9"
en
Affected
Libxml2
Search vendor "Libxml2"
 Libxml2
Search vendor "Libxml2" for product "Libxml2"
 >= 2.13.0 < 2.13.3
Search vendor "Libxml2" for product "Libxml2" and version " >= 2.13.0 < 2.13.3"
en
Affected