Use-After-Free in libexpat <= 2.4.9 via XML_ExternalEntityParserCreate
CVE-2022-43680 Published on October 24, 2022

In libexpat through 2.4.9, there is a use-after free caused by overeager destruction of a shared DTD in XML_ExternalEntityParserCreate in out-of-memory situations.

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Vulnerability Analysis

CVE-2022-43680 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.

Attack Vector:
NETWORK
Attack Complexity:
LOW
Privileges Required:
NONE
User Interaction:
NONE
Scope:
UNCHANGED
Confidentiality Impact:
NONE
Integrity Impact:
NONE
Availability Impact:
HIGH

Weakness Type

What is a Dangling pointer Vulnerability?

Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code.

CVE-2022-43680 has been classified to as a Dangling pointer vulnerability or weakness.


Products Associated with CVE-2022-43680

You can be notified by email with stack.watch whenever vulnerabilities like CVE-2022-43680 are published in these products:

Libexpatproject Libexpat
 
Debian Linux
 
Fedora Project Fedora
 
Canonical Ubuntu Linux
 
NetApp Oncommand Workflow Automation
 
NetApp Solidfire Hci Management Node
 
NetApp Active Iq Unified Manager
 

Exploit Probability

EPSS
0.38%
Percentile
59.23%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.