Overview
CVE-2022-4976 is a high-severity vulnerability discovered in the Archive::Unzip::Burst module, ranging from version 0.01 through 0.09, for Perl. This vulnerability stems from a bundled InfoZip library that is impacted by several other vulnerabilities, namely CVE-2014-8139, CVE-2014-8140 and CVE-2014-8141. Because of the severity and wide-reaching implications of this vulnerability, it poses a high risk, potentially leading to system compromise and data leakage. Therefore, understanding and mitigating this vulnerability should be a high priority for any organization utilizing the affected versions of Archive::Unzip::Burst.
Vulnerability Summary
CVE ID: CVE-2022-4976
Severity: Critical (9.8 CVSS Score)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: System compromise and data leakage
Affected Products
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Product | Affected Versions
Archive::Unzip::Burst | 0.01 through 0.09
How the Exploit Works
The CVE-2022-4976 vulnerability arises from the use of a bundled InfoZip library in the Archive::Unzip::Burst module. This library, which is affected by several historical vulnerabilities (CVE-2014-8139, CVE-2014-8140, CVE-2014-8141), opens a potential attack vector for malicious actors. With a successful exploit, attackers can compromise the system and potentially access sensitive data.
Conceptual Example Code
While there is no specific exploit code available for CVE-2022-4976, a conceptual example would involve the manipulation of compressed files in a manner that exploits the vulnerabilities in the InfoZip library. It could look something like this:
# Generate a malicious zip file
zip malicious.zip evil_payload
# Use the vulnerable module to unzip the file
perl -MArchive::Unzip::Burst -e 'unzip "malicious.zip"'In this example, `evil_payload` would be crafted in a way that exploits the vulnerabilities in the InfoZip library, leading to a potential system compromise or data leakage.
Mitigation Guidance
To mitigate the risk associated with CVE-2022-4976, apply the patch provided by the vendor. If it’s not possible to apply the patch immediately, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can provide temporary mitigation. It’s crucial to update to a version of Archive::Unzip::Burst that does not include the vulnerable InfoZip library as soon as possible.