CVE-2021-39238 : Security Advisory and Response

Certain HP printers may be vulnerable to potential buffer overflow.

Understanding CVE-2021-39238

Certain HP Enterprise LaserJet, HP LaserJet Managed, HP Enterprise PageWide, HP PageWide Managed products may be vulnerable to potential buffer overflow.

What is CVE-2021-39238?

CVE-2021-39238 is a vulnerability that affects certain HP Enterprise LaserJet, HP LaserJet Managed, HP Enterprise PageWide, HP PageWide Managed printers, potentially leading to buffer overflow.

The Impact of CVE-2021-39238

This vulnerability could allow attackers to execute arbitrary code or cause a denial of service on affected devices.

Technical Details of CVE-2021-39238

Certain technical information about the vulnerability is as follows:

Vulnerability Description

The vulnerability involves potential buffer overflow in specific HP printer models.

Affected Systems and Versions

The following systems and versions are affected by CVE-2021-39238:

HP Enterprise LaserJet, HP LaserJet Managed: Versions FS3 before 3.9.8
HP Enterprise PageWide, HP PageWide Managed: Versions FS4 before 4.11.2.1
HP Enterprise LaserJet, HP LaserJet Managed: Versions FS before 5.3
HP Enterprise LaserJet, HP LaserJet Managed: Versions FS5 before 5.3

Exploitation Mechanism

The vulnerability can be exploited by sending specially crafted print jobs to the affected printers, potentially leading to buffer overflow.

Mitigation and Prevention

To address CVE-2021-39238, consider the following:

Immediate Steps to Take

Apply patches provided by HP to update the firmware of the affected printers.
Monitor for any suspicious printing activities on the network.

Long-Term Security Practices

Regularly update printer firmware to protect against known vulnerabilities.
Implement network segmentation to isolate printers from critical systems.

Patching and Updates

Ensure timely installation of firmware updates from HP to mitigate the vulnerability.