Firmware security company Binarly has discovered another round of potentially serious firmware vulnerabilities that could allow an attacker to gain persistent access to any of the millions of affected devices.

The firm’s researchers have identified seven new security holes in InsydeH2O UEFI firmware provided by Insyde Software. The impacted code is used by dozens of other companies, including major vendors such as HP, Dell, Intel, Microsoft, Fujitsu, Framework, and Siemens.

Exploitation of the new vulnerabilities requires local privileged OS access, but many of them have still been assigned a ‘high severity’ rating. The flaws are related to System Management Mode (SMM) and they can lead to information disclosure or arbitrary code execution.

“These vulnerabilities can be used as second or third stage in the exploit chain to deliver long-term persistence invisible to most of the security solutions available in the market,” Alex Matrosov, the CEO of Binarly, told SecurityWeek.

“A firmware implant is the final goal for an attacker to maintain persistence. The attacker can install the malicious implant on different levels of the firmware, either as a modified legitimate module or a standalone driver. This kind of malicious code can bypass Secure Boot by design and influence further boot stages,” he added.

Binarly has made public individual advisories with technical details for each of the vulnerabilities.

The vendor has released patches and published advisories for the newly discovered vulnerabilities. CVE identifiers have been assigned to each of the seven bugs.

While Insyde has developed patches, Matrosov pointed out that it will take a long time for the fixes to reach devices.

“In terms of supply chain impact, it will take 6-9 months based on our data for the vulnerabilities to be patched by device manufacturers at least on all the enterprise devices,” he said.

This is not the first time Binarly has found serious vulnerabilities in InsydeH2O firmware. Earlier this year, it disclosed nearly two dozen issues impacting millions of enterprise devices using the affected code.

The latest disclosure comes just weeks after Binarly reported finding a dozen similar vulnerabilities affecting Intel and HP devices.

By Eduard Kovacs on Fri, 23 Sep 2022 12:50:39 +0000
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