Use-After-Free Vulnerability in libexpat Affects Multiple Vendors
CVE-2022-43680

7.5HIGH

Key Information:

Vendor
Libexpat Project
Status
Libexpat
Vendor
CVE Published:
24 October 2022

Badges

👾 Exploit Exists🟡 Public PoC

Summary

In libexpat version 2.4.9, a vulnerability exists due to a use-after-free condition arising from premature destruction of a shared Document Type Definition (DTD) during low memory situations. This could potentially allow an attacker to exploit the vulnerability and lead to unexpected behavior, including arbitrary code execution in vulnerable applications using this library.

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

external_expat-2.1.0_CVE-2022-43680
Created by Trinadh465

References

https://github.com/libexpat/libexpat/pull/650
https://github.com/libexpat/libexpat/issues/649
https://github.com/libexpat/libexpat/pull/616

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

.