150 HP Multi-function Printer Sort Susceptible to Exploitation • Register

Malicious individuals can compromise 150 fashions of HP multi-function printers by tricking customers into visiting a malicious webpage, in response to F-Safe researchers.

The Finland-headquartered InfoSec agency stated it discovered “exploitable” flaws in HP printers that allowed attackers to “take management of susceptible gadgets, steal data and infiltrate networks for different functions corresponding to stealing or altering different information.” Granted”—and, basically, “spreading ransomware.”

“In all chance, loads of corporations are utilizing these susceptible instruments,” stated F-Safe researchers Alexander Bolshev and Timo Hirvonen.

“To make issues worse, many organizations don’t deal with printers like different sorts of endpoints. Which means that IT and safety groups overlook about primary safety hygiene of those gadgets, corresponding to putting in updates. “

A person will be tricked into visiting a malicious web site, F-Safe stated, leading to what the infosec biz describes as a “cross-site printing assault.”

The center of the assault is in a doc printed from the malicious website: it contained a “maliciously crafted font” that gave the attacker code execution privileges on a multi-function printer.

These privileges can be utilized to steal copies of paperwork despatched to be printed, scanned or photocopied utilizing the machine. As well as, it can be used as a toe for additional unlawful community entry, a most popular strategy of ransomware gangs amongst others.

“Whereas researchers decided that exploiting vulnerabilities is troublesome sufficient to discourage many less-skilled attackers from utilizing them, skilled menace actors can use them in additional focused campaigns,” warned F-Safe.

Booby-trapped font information are an age-old assault vector. Again in 2016 Cisco’s Talos Infosec arm warned of a number of flaws within the libgraphite library. Equally, final yr Microsoft issued a warning on exploitable flaws within the Adobe Sort Supervisor library.

Wolves have been publicly uncovered a month in the past. The font vulnerability is tracked as CVE-2021-39238 and is listed as affecting the HP Enterprise LaserJet, LaserJet Managed, Enterprise PageWide and PageWide Managed product traces. It’s rated as 9.3 out of 10 on the CVSS 3.0 severity scale.

Many organizations don’t deal with printers like different sorts of endpoints. Which means that IT and safety groups overlook about primary safety sanitization of those instruments, corresponding to putting in updates.

The second gap is named CVE-2021-39237 and impacts the identical printer mannequin. Rated 7.1 on the CVSS v3.0 scale, HP described it solely as an “data disclosure” flaw, whereas F-Safe known as it “uncovered bodily entry port vulnerabilities.”

Whereas not downplaying the seriousness of F-Safe’s findings, permitting a malicious particular person to achieve bodily entry to a community machine is usually seen as a trump card in InfoSec circles.

F-Safe suggested MFPs so as to add a separate, firewalled VLAN in addition to bodily safety controls, together with anti-tamper stickers and CCTV.

The up to date firmware is on the market for obtain from HP, the corporate stated in a press release.

Vulns usually are not associated to the extent to have the ability to run on current HP printers by F-Safe Apocalypse on its display screen. The Finnish agency has promised extra about it later this yr.

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