FortiOS flaw was exploited to compromise governmental targets (CVE-2022-42475)

A critical vulnerability in FortiOS SSL-VPN that Fortinet has issued patches for in November 2022 has been exploited by attackers to compromise governmental or government-related targets, the company has shared.

They also pointed out that the malware can manipulate log files so it can avoid detection.

“It searches for elog files, which are logs of events in FortiOS. After decompressing them in memory, it searches for a string the attacker specifies, deletes it, and reconstructs the logs. The malware can also kill the logging processes,” the company explained.

This latest Fortinet disclosure has again pushed into the spotlight the fact that, when some of the FortiOS updates were released in November 2022, there was no indication in the change logs of a vulnerability exploited in the wild having been fixed.

The CVE-numbered flaw was added to the change log later but, again, with no indication of its exploitation.

As some of those in charge of patching organizations’ IT and IT Sec solutions have pointed out, a CVE in the change log would have affected their decision to schedule the update sooner rather than later.

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