Signed Integer Overflow in Expat Vulnerable Products
CVE-2022-23852

9.8CRITICAL

Key Information:

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

Badges

👾 Exploit Exists🟡 Public PoC

Summary

The Expat XML parsing library, specifically versions prior to 2.4.4, is affected by a signed integer overflow vulnerability in the XML_GetBuffer function. This issue occurs when configurations include a nonzero XML_CONTEXT_BYTES, potentially enabling attackers to exploit the overflow and achieve unintended behaviors in the processes utilizing 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_AOSP10_r33_CVE-2022-23852
Created by Satheesh575555

References

https://github.com/libexpat/libexpat/pull/550
x_refsource_MISC
https://www.debian.org/security/2022/dsa-5073
vendor-advisoryx_refsource_DEBIAN
https://lists.debian.org/debian-lts-announce/2022/03/msg0...
mailing-listx_refsource_MLIST

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
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

.