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Scrape Timestamp (UTC): 2023-10-05 09:34:10.345
Source: https://thehackernews.com/2023/10/cisa-warns-of-active-exploitation-of.html
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CISA Warns of Active Exploitation of JetBrains and Windows Vulnerabilities. The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Wednesday added two security flaws to its Known Exploited Vulnerabilities (KEV) catalog due to active exploitation, while removing five bugs from the list due to lack of adequate evidence. The vulnerabilities newly added are below - CVE-2023-42793 relates to a critical authentication bypass vulnerability that allows for remote code execution on TeamCity Server. Data gathered by GreyNoise has revealed exploitation attempts targeting the flaw from 74 unique IP addresses to date. On the other hand, CVE-2023-28229 is a high-severity flaw in the Microsoft Windows Cryptographic Next Generation (CNG) Key Isolation Service that allows an attacker to gain specific limited SYSTEM privileges. There are currently no public reports documenting in-the-wild exploitation of the bug, and CISA has not disclosed any further details about the attacks or exploitation scenarios. A proof-of-concept (PoC) was made available early last month. Microsoft, for its part, tagged CVE-2023-28229 with an "Exploitation Less Likely" assessment. It was patched by the tech giant as part of Patch Tuesday updates released in April 2023. The cybersecurity agency has also removed five flaws affecting Owl Labs Meeting Owl from the KEV catalog, citing "insufficient evidence." While CVE-2022-31460 was added in June 2022, four other vulnerabilities (CVE-2022-31459, CVE-2022-31461, CVE-2022-31462, and CVE-2022-31463) were added on September 18, 2023. In light of the active exploitation of the two flaws, Federal Civilian Executive Branch (FCEB) agencies are required to apply the vendor-provided patches by October 25, 2023, to secure their networks against potential threats.
Daily Brief Summary
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has reported active exploitation of two security flaws: one in TeamCity Server and another in Microsoft Windows Cryptographic Next Generation (CNG) Key Isolation Service.
The flaw in TeamCity Server (CVE-2023-42793) is an authentication bypass vulnerability that permits remote code execution. Evidence collected indicates at least 74 unique IP addresses have targeted this vulnerability.
The Microsoft Windows flaw (CVE-2023-28229), while rated as high-severity, has not yet been publicly reported as exploited in-the-wild and Microsoft marked it as "Exploitation Less Likely".
The bugs were added to CISA's Known Exploited Vulnerabilities catalog, while five vulnerabilities affecting Owl Labs Meeting Owl were removed due to insufficient evidence of exploitation.
A proof-of-concept for the Windows flaw was made available early last month. Microsoft patched this vulnerability as part of its Patch Tuesday updates in April 2023.
Federal Civilian Executive Branch (FCEB) agencies have been instructed to apply the patches provided by vendors for the two actively exploited vulnerabilities by October 25, 2023.