Integer Overflow Vulnerability in Expat XML Parser by Libexpat
CVE-2022-22822

9.8CRITICAL

Key Information:

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

Badges

👾 Exploit Exists🟡 Public PoC

Summary

The issue involves an integer overflow in the addBinding function within xmlparse.c in the Expat XML parser, specifically in versions prior to 2.4.3. This vulnerability can lead to unexpected behavior in the software, potentially allowing an attacker to exploit the flaw for malicious purposes. Users of Expat are advised to upgrade to version 2.4.3 or later to mitigate risks associated with this vulnerability. The release notes and security advisories related to this vulnerability can provide further guidance and information on updates.

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-2022-22822toCVE-2022-22827
Created by nanopathi

References

https://github.com/libexpat/libexpat/pull/539
x_refsource_MISC
http://www.openwall.com/lists/oss-security/2022/01/17/3
mailing-listx_refsource_MLIST
https://www.tenable.com/security/tns-2022-05
x_refsource_CONFIRM

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

.