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Cisco Talos has released new coverage to detect and prevent the exploitation of two recently disclosed vulnerabilities collectively referred to as "ProxyNotShell," affecting Microsoft Exchange Servers 2013, 2016 and 2019. One of these vulnerabilities could allow an attacker to execute remote code on the targeted server. Limited exploitation of these vulnerabilities in the wild has been reported. CVE-2022-41040 is a Server Side Request Forgery (SSRF) vulnerability, while CVE-2022-41082 enables Remote Code Execution (RCE) when PowerShell is accessible to the attackers. While no fixes or patches are available yet, Microsoft has provided mitigations for on-premises Microsoft Exchange users on Sept. 29, 2022. Even organizations that use Exchange Online may still be affected if they run a hybrid server. Cisco Talos is closely monitoring the recent reports of exploitation attempts against these vulnerabilities and strongly recommends users implement mitigation steps while waiting for securit...

Even organizations that use Exchange Online may still be affected if they run a hybrid server.

Talos is publishing a glimpse into the most prevalent threats we've observed between Sept. 23 and Sept. 30.

Today, Talos is publishing a glimpse into the most prevalent threats we've observed between Sept. 23 and Sept. 30. As with previous roundups, this post isn't meant to be an in-depth analysis. Instead, this post will summarize the threats we've observed by highlighting key behavioral characteristics, indicators of compromise, and discussing how our customers are automatically protected from these threats. As a reminder, the information provided for the following threats in this post is non-exhaustive and current as of the date of publication. Additionally, please keep in mind that IOC searching is only one part of threat hunting. Spotting a single IOC does not necessarily indicate maliciousness. Detection and coverage for the following threats is subject to updates, pending additional threat or vulnerability analysis. For the most current information, please refer to your Firepower Management Center, Snort.org, or ClamAV.net. For each threat described below, this blog post only lists...

Insecure direct object references (IDOR) vulnerability in ExpressTech Quiz And Survey Master plugin <= 7.3.4 at WordPress allows attackers to change the content of the quiz.

Cross-Site Scripting (XSS) via Cross-Site Request Forgery (CSRF) vulnerability in Booking Ultra Pro plugin <= 1.1.4 at WordPress.

Joplin version 2.8.8 allows an external attacker to execute arbitrary commands remotely on any client that opens a link in a malicious markdown file, via Joplin. This is possible because the application does not properly validate the schema/protocol of existing links in the markdown file before passing them to the 'shell.openExternal' function.

Gridea version 0.9.3 allows an external attacker to execute arbitrary code remotely on any client attempting to view a malicious markdown file through Gridea. This is possible because the application has the 'nodeIntegration' option enabled.

Red Hat Security Advisory 2022-6753-01 - The httpd packages provide the Apache HTTP Server, a powerful, efficient, and extensible web server. Issues addressed include buffer overflow, denial of service, information leakage, null pointer, out of bounds read, out of bounds write, and server-side request forgery vulnerabilities.

Red Hat Security Advisory 2022-6755-01 - IBM Java SE version 7 Release 1 includes the IBM Java Runtime Environment and the IBM Java Software Development Kit. This update upgrades IBM Java SE 7 to version 7R1 SR5-FP15.