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CISA Adds 3 Actively Exploited Flaws to KEV Catalog, including Critical PaperCut Bug.


KEV Catalog

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Friday added three security flaws to its Known Exploited Vulnerabilities (KEV) catalog, based on evidence of active exploitation.

The three vulnerabilities are as follows -

  • CVE-2023-28432 (CVSS score - 7.5) - MinIO Information Disclosure Vulnerability 
  • CVE-2023-27350 (CVSS score - 9.8) - PaperCut MF/NG Improper Access Control Vulnerability
  • CVE-2023-2136 (CVSS score - TBD) - Google Chrome Skia Integer Overflow Vulnerability

"In a cluster deployment, MinIO returns all environment variables, including MINIO_SECRET_KEY and MINIO_ROOT_PASSWORD, resulting in information disclosure," MinIO maintainers saidin an advisory published on March 21, 2023.

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Data gathered by GreyNoise shows that as many as 18 unique malicious IP addressesfrom the U.S., the Netherlands, France, Japan, and Finland have attempted to exploit the flaw over the past 30 days.

The threat intelligence company, in an alertpublished late last month, also noted how a reference implementation provided by OpenAI for developers to integrate their plugins to ChatGPT relied on an older version of MinIO that's vulnerable to CVE-2023-28432.

"While the new feature released by OpenAI is a valuable tool for developers who want to access live data from various providers in their ChatGPT integration, security should remain a core design principle," GreyNoise said.

Also added to the KEV catalog is a critical remote code execution bug affecting PaperCut print management software that allows remote attackers to bypass authentication and run arbitrary code.

The vulnerability has been addressed by the vendor as of March 8, 2023, with the release of PaperCut MF and PaperCut NG versions 20.1.7, 21.2.11, and 22.0.9. Zero Day Initiative, which reported the issue on January 10, 2023, is expected to release additional technical details on May 10, 2023.

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According to an update shared by the Melbourne-based company earlier this week, evidence of active exploitation of unpatched servers emerged in the wild around April 18, 2023.

Cybersecurity firm Arctic Wolf said it "has observed intrusion activity associated with a vulnerable PaperCut Server where the RMM tool Synchro MSP was loaded onto a victim system."

Lastly added to the list of actively exploited flaws is a Google Chrome vulnerabilityaffecting the Skia 2D graphics library that could enable a threat actor to perform a sandbox escape via a crafted HTML page.

Federal Civilian Executive Branch (FCEB) agencies in the U.S. are recommended to remediate identified vulnerabilities by May 12, 2023, to secure their networks against active threats.

Source: THN.

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