Atlassian Confluence Server Bug Under Active Attack to Distribute Ransomware
Most of the attacks involve the use of automated exploits, security vendor says.
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Background for this topic.
An exploit is code, data, or a sequence of actions that uses a software, hardware, or configuration vulnerability to produce unintended behavior. Depending on the flaw and the attacker’s access, it may enable unauthorized code execution, privilege escalation, information disclosure, or denial of service. Exploitation can occur remotely through exposed services, web applications, or client software, or locally after an attacker gains limited access.
Exploitation matters because a vulnerability becomes an active attack path when the required conditions are reachable and exploitable. Defenders should inventory affected assets, prioritize remediation when exploitation is known or credible, apply patches or vendor mitigations, and reduce exposure through access controls, segmentation, and secure configuration. Monitoring for exploit-specific indicators—such as abnormal requests, unexpected processes, or privilege changes—supports detection; systems suspected of successful exploitation require containment and investigation for follow-on access.
Most of the attacks involve the use of automated exploits, security vendor says.
Chinese hackers used a zero-day exploit for a critical-severity vulnerability in Sophos Firewall to compromise a company and breach cloud-hosted web servers operated by the victim. [...]
Microsoft is warning that the BlackCat ransomware crew is leveraging exploits for unpatched Exchange server vulnerabilities to gain access to targeted networks
The threat actor known as 'Blue Mockingbird' has been observed by analysts targeting Telerik UI vulnerabilities to compromise servers, install Cobalt Strike beacons, and mine Monero by hijacking system resources. [...]
Microsoft says BlackCat ransomware affiliates are now attacking Microsoft Exchange servers using exploits targeting unpatched vulnerabilities. [...]
Ukraine's Computer Emergency Response Team (CERT) is warning that the Russian hacking group Sandworm may be exploiting Follina, a remote code execution vulnerability in Microsoft Windows Support Diagnostic Tool (MSDT) currently tracked as CVE-2022-30190. [...]