SysAid zero
Vulnerabilities mentionedAll →
| CVE | Vulnerability | CVSS | EPSS | Flags | Affected | Exposure | Published |
|---|---|---|---|---|---|---|---|
| CVE-2023-47246 | Unauthenticated Path Traversal RCE in SysAid On-Premise Server CVE-2023-47246 is a critical (CVSS 9.8) path traversal flaw (CWE-22) in SysAid On-Premise before version 23.3.36 that allows an unauthenticated, network-located attacker to write attacker-controlled files into the Tomcat webroot of the SysAid server. Once a file is written into that webroot, it is executed by the Tomcat application server, resulting in remote code execution on the ITSM server. Because the flaw requires no authentication or user interaction, any internet-exposed SysAid On-Premise server is directly reachable, and compromise can lead to data theft and ransomware deployment; the Lace Tempest group behind the MOVEit attacks has exploited it, and ransomware use is known. Only SysAid On-Premise deployments are affected, and the vendor fixed the issue in version 23.3.36. The vulnerability is confirmed exploited in the wild, was added to CISA's Known Exploited Vulnerabilities catalog on 2023-11-13, and carries a 98.9% EPSS probability of exploitation within 30 days. Do: Upgrade SysAid On-Premise to version 23.3.36 or later immediately, per the vendor's security notification. Because this is KEV-listed with known ransomware use by Lace Tempest, also inspect the Tomcat webroot and deployed webapps for unauthorized files (e.g., WAR files), review for unauthorized accounts and unusual processes, and check for signs of lateral movement on compromised hosts. Organizations unable to patch should apply mitigations per the vendor's instructions or discontinue use of the product, per the CISA required action. | 9.8 | 99% | KEV ransomware PoC |
| moderate≈ a few thousand internet-exposed SysAid On-Premise servers (SysAid's overall customer base is on the order of tens of thousands of organizations, and only the… |
Full article448 words · extracted from securityaffairs.com · click to collapse
Pierluigi Paganini
November 10, 2023
Microsoft spotted the exploitation of a SysAid zero-day vulnerability in limited attacks carried out by the Lace Tempest group.
Microsoft reported the exploitation of a zero-day vulnerability, tracked as CVE-2023-47246, in the SysAid IT support software in limited attacks.
The IT giant linked the attacks to the Clop ransomware gang (aka Lace Tempest). The company reported the flaw to the software vendor which quickly fixed it.
The Lace Tempest operators exploited the vulnerability to issue commands via the SysAid software to deliver a loader for the Gracewire malware (aka FlawedGrace). The malware enabled human-operated activity, including lateral movement, data theft, and ransomware deployment.
After exploiting the vulnerability, Lace Tempest issued commands via the SysAid software to deliver a malware loader for the Gracewire malware. This is typically followed by human-operated activity, including lateral movement, data theft, and ransomware deployment.
— Microsoft Threat Intelligence (@MsftSecIntel) November 9, 2023
SysAid reported that on November 2nd, its security team became aware of a potential vulnerability in its on-premise software. The software firm engaged the cybersecurity firm Profero to investigate the issue. Profero determined that the software was affected by a zero-day vulnerability.
“The investigation identified a previously unknown path traversal vulnerability leading to code execution within the SysAid on-prem software.” reads the report published by Profero. “The vulnerability was exploited by a group known as DEV-0950 (Lace Tempest), as identified by the Microsoft Threat Intelligence team. The attacker uploaded a WAR archive containing a WebShell and other payloads into the webroot of the SysAid Tomcat web service.” “The WebShell provided the attacker with unauthorized access and control over the affected system. Subsequently, the attacker utilized a PowerShell script, deployed through the WebShell, to execute a malware loader named user.exe on the compromised host, which was used to load the GraceWire trojan.”
Rapid7 researchers reported that Shodan searches for either a specific CSS file or the favicon both return only 416 instances of SysAid exposed to the public internet. (Note that “exposed” does not necessarily imply that those instances are vulnerable.).
SysAid addressed the flaw with the release of version 23.3.36 on November 8.
Below are the recommendations provided by the software vendor to its customers:
- Ensure that your SysAid systems are updated to version 23.3.36, which includes the patches for the identified vulnerability.
- Conduct a thorough compromise assessment of your SysAid server to look for any indicators mentioned.
- Review any credentials or other information that would have been available to someone with full access to your SysAid server and check any relevant activity logs for suspicious behavior.
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