While not downplaying the seriousness of F-Secure's findings, a malicious person gaining physical access to a networked device is generally seen as a trump card in infosec circles.į-Secure advised putting MFPs inside a separate, firewalled VLAN as well as adding physical security controls including anti-tamper stickers and CCTV. Rated 7.1 on the CVSS v3.0 scale, HP described it only as an 'information disclosure' flaw while F-Secure obliquely called it 'exposed physical access port vulnerabilities.' Ei ole syytä paniikkiin, mutta heidän tulee arvioida altistumisensa, jotta he voivat valmistautua näitä hyökkäyksiä vastaan, F-Securen tietoturvakonsultti Timo Hirvonen sanoo tiedotteessa. That means IT and security teams forget about these devices' basic security hygiene, such as installing updatesĪ second hole is known as CVE-2021-39237 and affects the same printer models. Many organizations don't treat printers like other types of endpoints. It is rated as 9.3 out of 10 on the CVSS 3.0 severity scale. The font vulnerability is tracked as CVE-2021-39238 and is listed as affecting HP Enterprise LaserJet, LaserJet Managed, Enterprise PageWide, and PageWide Managed product lines. If exploited successfully, F-Secure consultants Timo Hirvonen and Alexander Bolshev said they could be used to gain full control of a target enterprise’s network. The vulns were publicly disclosed a month ago. Similarly, last year Microsoft issued a warning over exploitable flaws in Adobe Type Manager Library. F-Secures key executives include Risto Siilasmaa and 8 others. Back in 2016 Cisco's Talos infosec arm warned of a series of flaws in the Libgraphite library. F-Secures Chairman of the Board is Risto Siilasmaa.

We don't want to alarm you, but PostScript makes your printer an attack vectorīooby-trapped font files are an age-old attack vector.

The PrintNightmare continues: Microsoft confirms presence of vulnerable code in all versions of Windows.

It's 2020 and hackers are still hijacking Windows PCs by exploiting font parser security holes.

It's 2016 and a font file can own your computer.

'While the researchers determined that exploiting the vulnerabilities is difficult enough to prevent many low-skilled attackers from using them, experienced threat actors could make use of them in more targeted operations,' warned F-Secure. In addition, it could also be used as a toehold for further illicit network access, a favoured technique of ransomware gangs among others. Those privileges could be used to steal copies of documents sent to be printed, scanned or photocopied using the device.

Timo hirvonen f secure