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The product information label contains your serial number and product number. You can find it either on the back of your laptop, inside the battery compartment or under the cover on the back of the laptop.

Sample product label

If your laptop is currently functioning you can find the serial number by using a simple keyboard command.

  • 1. From your built-in keyboard, press and hold the Fn + Esc buttons at the same time.
  • 2. An HP System Information pop-up box will appear on your screen with your serial number.

The product information label contains your serial number and product number. Depending on your desktop model you can find it on the side, top, front or back of the computer. For All-in-One PCs you will find it on the back.

Sample product label

If your computer is currently functioning you can find the serial number by using a simple keyboard command.

  • 1. From your keyboard, press and hold the Ctrl+Alt+S buttons at the same time.
  • 2. An HP System Information pop-up box will appear on your screen with your serial number.
The product information label contains your serial number and product number. For almost all HP products, the product information label can be found from one of the following locations :
  • A label attached to the product (usually on the underside)
  • Laser etching on the surface of the product
  • Inside the battery compartment
  • A purchase invoice or receipt
  • Product packaging or shipping box
  • Documentation that came with the product
Sample product label
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Sours: https://support.hp.com/wps/portal/pps/Home/SWDSelfService/!ut/p/z0/04_Sj9CPykssy0xPLMnMz0vMAfIjo8zifRw9Ddw9TAy8_c1CHA0cHS3cw5z8DAwN_E30C7IdFQHegKVD/

HP patches vulnerable driver lurking in printers for 16 years

HP has patched a severe vulnerability that has been hidden in a printer driver for 16 years. 

On Tuesday, SentinelLabs published an analysis of the vulnerability, tracked as CVE-2021-3438 and issued a CVSS score of 8.8. 

The security issue is described as a "potential buffer overflow in the software drivers for certain HP LaserJet products and Samsung product printers could lead to an escalation of privilege."

According to the researchers, some HP, Xerox, and Samsung printer models contained vulnerable driver software, sold worldwide since 2005. 

The driver in question, SSPORT.SYS, is automatically installed and activated, whether the model was wireless or cabled. The driver is also loaded automatically by Microsoft's Windows operating system on PC boot. 

"This makes the driver a perfect candidate to target since it will always be loaded on the machine even if there is no printer connected," the researchers say. 

The vulnerable function in the driver is the acceptance of data without size parameter validation, allowing attackers to overrun the driver's buffer theoretically. 

Local attackers could escalate their privileges to a SYSTEM account and run code in kernel mode in order to perform actions including tampering with a target machine. However, SentinelLabs says that the time was not invested in finding a way to weaponize it alone, and a successful exploit may need a chain of vulnerabilities. 

SentinelLabs researcher Kasif Dekel reported the vulnerability to HP on February 18. The vendor issued a patch to resolve the security flaw on May 19. No exploits in the wild have been detected. 

HP said impacted models include the HP LaserJet, Samsung CLP, Samsung MultiXpress, and Samsung Xpress series in a security advisory.

The vendor has provided a patch and is asking customers to update their software. To do so, customers can visit the HP software portal, select their printer model, and apply the update. 

Xerox has provided a separate security advisory (.PDF) naming Xerox B205/B210/B215, Phaser, and WorkCentre models as impacted by the bug.

Previous and related coverage


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16-Year-Old HP Printer-Driver Bug Impacts Millions of Windows Machines

Researchers have released technical details on a high-severity privilege-escalation flaw in HP printer drivers (also used by Samsung and Xerox), which impacts hundreds of millions of Windows machines.

If exploited, cyberattackers could bypass security products; install programs; view, change, encrypt or delete data; or create new accounts with more extensive user rights.

The bug (CVE-2021-3438) has lurked in systems for 16 years, researchers at SentinelOne said, but was only uncovered this year. It carries an 8.8 out of 10 rating on the CVSS scale, making it high-severity.

According to researchers, the vulnerability exists in a function inside the driver that accepts data sent from User Mode via Input/Output Control (IOCTL); it does so without validating the size parameter. As the name suggests, IOCTL is a system call for device-specific input/output operations.

“This function copies a string from the user input using ‘strncpy’ with a size parameter that is controlled by the user,” according to SentinelOne’s analysis, released on Tuesday. “Essentially, this allows attackers to overrun the buffer used by the driver.”

Thus, unprivileged users can elevate themselves into a SYSTEM account, allowing them to run code in kernel mode, since the vulnerable driver is locally available to anyone, according to the firm.

The printer-based attack vector is perfect for cybercriminals, according to SentinelOne, since printer drivers are essentially ubiquitous on Windows machines and are automatically loaded on every startup.

“Thus, in effect, this driver gets installed and loaded without even asking or notifying the user,” explained the researchers. “Whether you are configuring the printer to work wirelessly or via a USB cable, this driver gets loaded. In addition, it will be loaded by Windows on every boot. This makes the driver a perfect candidate to target since it will always be loaded on the machine even if there is no printer connected.”

Weaponizing the bug might require chaining other vulnerabilities to achieve initial access into an environment. So far, no in-the-wild attacks have been observed.

“While we haven’t seen any indicators that this vulnerability has been exploited in the wild up till now, with hundreds of millions of enterprises and users currently vulnerable, it is inevitable that attackers will seek out those that do not take the appropriate action,” researchers warned.

How to Fix the HP Printer-Driver Bug

Since the bug has existed since 2005, it impacts a very long list of printer models, researchers noted; affected models and associated patches can be found here and here.

Device-driver vulnerabilities are not uncommon, so SentinelOne also suggested reducing the attack surface with some best practices, including enforcing strong access control lists (ACLs), which control access to packages, folders, and other elements (such as services, document types and specifications) at the group level. And, it’s a good idea to verify user input and not expose a generic interface to kernel mode operations, they added.

“While HP is releasing a patch (a fixed driver), it should be noted that the certificate has not yet been revoked at the time of writing,” according to SentinelOne. “This is not considered best practice since the vulnerable driver can still be used in bring-your-own-vulnerable-driver (BYOVD) attacks.”

Some Windows machines may already have the vulnerable driver without even running a dedicated installation file, researchers warned, since it comes with Microsoft Windows via Windows Update.

“This high-severity vulnerability affects hundreds of millions of devices and millions of users worldwide,” according to SentinelOne. “The impact this could have on users and enterprises that fail to patch is far-reaching and significant.”

SentinelOne has found previous vulnerabilities such as a group affecting Dell’s firmware update driver that remained hidden for 12 years. In that case, revealed in May, five high-severity security flaws in were found to impact potentially hundreds of millions of Dell desktops, laptops, notebooks and tablets. They could allow the ability to bypass security products, execute code and pivot to other parts of the network for lateral movement, according to SentinelLabs.

Check out our free upcoming live and on-demand webinar events – unique, dynamic discussions with cybersecurity experts and the Threatpost community.

 

Sours: https://threatpost.com/hp-printer-driver-bug-windows/167944/
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