On Thursday, February 2, 2023, security reporter Brian Krebs published a warning on Mastodon about an actively exploited zero-day vulnerability affecting on-premise instances of Fortra’s GoAnywhere MFT managed file transfer solution. Fortra (formerly HelpSystems) evidently published an advisory on February 1 behind authentication; there is no publicly accessible advisory.

Rapid7 discovered several vulnerabilities and exposures in F5 BIG-IP and BIG-IQ devices running a customized distribution of CentOS detailed in F5's Base Operating Systems support article. The affected products are detailed in the vendor advisories below:

CVE-2022-42889, which some have begun calling “Text4Shell,” is a vulnerability in the popular Apache Commons Text library that can result in code execution when processing malicious input. The vulnerability was announced on October 13, 2022 on the Apache dev list and originally reported by Alvaro Munoz

On May 6, 2022, Rarlab released version 6.17, which addresses CVE-2022-30333, a path traversal vulnerability reported to them by Sonar, who posted a write-up about it. Sonar specifically calls out Zimbra Collaboration Suite’s usage of unrar as vulnerable (specifically, the amavisd component, which is used to inspect incoming emails for spam and malware). Zimbra addressed this issue in 9.0.0 patch 25 and 8.5.15 patch 32 by replacing unrar with 7z.

On December 14, 2021, during the Log4Shell chaos, Microsoft published CVE-2021-43893, a remote privelege escalation vulnerability affecting Windows EFS.

On May 6, 2022, Rarlab released version 6.17, which addresses CVE-2022-30333, a path traversal vulnerability reported to them by Sonar, who posted a write-up about it. Sonar specifically calls out Zimbra Collaboration Suite’s usage of unrar as vulnerable (specifically, the amavisd component, which is used to inspect incoming emails for spam and malware). Zimbra addressed this issue in 9.0.0 patch 25 and 8.5.15 patch 32 by replacing unrar with 7z.

On December 14, 2021, during the Log4Shell chaos, Microsoft published CVE-2021-43893, a remote privelege escalation vulnerability affecting Windows EFS.