Namespace Separator Character Vulnerability in Expat Library by Libexpat
CVE-2022-25236

9.8CRITICAL

Key Information:

Vendor

Libexpat Project

Status
Libexpat
Vendor
CVE Published:
16 February 2022

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2022-25236?

The Expat library, also known as libexpat, versions prior to 2.4.5 contain a vulnerability that allows attackers to insert namespace-separator characters into namespace URIs. This attack vector can lead to various security issues, such as XML parsing attacks, which could compromise the integrity and security of applications utilizing this library. It is crucial for users of Expat to upgrade to the latest version to mitigate the risks associated with this vulnerability.

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-2022-25236
Created by Satheesh575555

References

https://github.com/libexpat/libexpat/pull/561
x_refsource_MISC
http://www.openwall.com/lists/oss-security/2022/02/19/1
mailing-listx_refsource_MLIST
https://www.debian.org/security/2022/dsa-5085
vendor-advisoryx_refsource_DEBIAN

EPSS Score

9% chance of being exploited in the next 30 days.

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

.