Security Vulnerabilities - Known exploited
CVE-2021-34523
Microsoft Exchange Server Elevation of Privilege Vulnerability
Known exploited
CVSS Score
9.0
EPSS Score
0.941
Published
2021-07-14
CVE-2021-34473
Microsoft Exchange Server Remote Code Execution Vulnerability
Known exploited
CVSS Score
9.1
EPSS Score
0.943
Published
2021-07-14
CVE-2021-33766
Microsoft Exchange Server Information Disclosure Vulnerability
Known exploited
CVSS Score
7.3
EPSS Score
0.936
Published
2021-07-14
CVE-2021-33771
Windows Kernel Elevation of Privilege Vulnerability
Known exploited
CVSS Score
7.8
EPSS Score
0.018
Published
2021-07-14
CVE-2021-31196
Microsoft Exchange Server Remote Code Execution Vulnerability
Known exploited
CVSS Score
7.2
EPSS Score
0.039
Published
2021-07-14
CVE-2021-31979
Windows Kernel Elevation of Privilege Vulnerability
Known exploited
CVSS Score
7.8
EPSS Score
0.01
Published
2021-07-14
CVE-2021-30116
Kaseya VSA before 9.5.7 allows credential disclosure, as exploited in the wild in July 2021. By default Kaseya VSA on premise offers a download page where the clients for the installation can be downloaded. The default URL for this page is https://x.x.x.x/dl.asp When an attacker download a client for Windows and installs it, the file KaseyaD.ini is generated (C:\Program Files (x86)\Kaseya\XXXXXXXXXX\KaseyaD.ini) which contains an Agent_Guid and AgentPassword This Agent_Guid and AgentPassword can be used to log in on dl.asp (https://x.x.x.x/dl.asp?un=840997037507813&pw=113cc622839a4077a84837485ced6b93e440bf66d44057713cb2f95e503a06d9) This request authenticates the client and returns a sessionId cookie that can be used in subsequent attacks to bypass authentication. Security issues discovered --- * Unauthenticated download page leaks credentials * Credentials of agent software can be used to obtain a sessionId (cookie) that can be used for services not intended for use by agents * dl.asp accepts credentials via a GET request * Access to KaseyaD.ini gives an attacker access to sufficient information to penetrate the Kaseya installation and its clients. Impact --- Via the page /dl.asp enough information can be obtained to give an attacker a sessionId that can be used to execute further (semi-authenticated) attacks against the system.
Known exploited
CVSS Score
10.0
EPSS Score
0.18
Published
2021-07-09
CVE-2021-34527
<p>A remote code execution vulnerability exists when the Windows Print Spooler service improperly performs privileged file operations. An attacker who successfully exploited this vulnerability could run arbitrary code with SYSTEM privileges. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.</p>
<p>UPDATE July 7, 2021: The security update for Windows Server 2012, Windows Server 2016 and Windows 10, Version 1607 have been released. Please see the Security Updates table for the applicable update for your system. We recommend that you install these updates immediately. If you are unable to install these updates, see the FAQ and Workaround sections in this CVE for information on how to help protect your system from this vulnerability.</p>
<p>In addition to installing the updates, in order to secure your system, you must confirm that the following registry settings are set to 0 (zero) or are not defined (<strong>Note</strong>: These registry keys do not exist by default, and therefore are already at the secure setting.), also that your Group Policy setting are correct (see FAQ):</p>
<ul>
<li>HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows NT\Printers\PointAndPrint</li>
<li>NoWarningNoElevationOnInstall = 0 (DWORD) or not defined (default setting)</li>
<li>UpdatePromptSettings = 0 (DWORD) or not defined (default setting)</li>
</ul>
<p><strong>Having NoWarningNoElevationOnInstall set to 1 makes your system vulnerable by design.</strong></p>
<p>UPDATE July 6, 2021: Microsoft has completed the investigation and has released security updates to address this vulnerability. Please see the Security Updates table for the applicable update for your system. We recommend that you install these updates immediately. If you are unable to install these updates, see the FAQ and Workaround sections in this CVE for information on how to help protect your system from this vulnerability. See also <a href="https://support.microsoft.com/topic/31b91c02-05bc-4ada-a7ea-183b129578a7">KB5005010: Restricting installation of new printer drivers after applying the July 6, 2021 updates</a>.</p>
<p>Note that the security updates released on and after July 6, 2021 contain protections for CVE-2021-1675 and the additional remote code execution exploit in the Windows Print Spooler service known as “PrintNightmare”, documented in CVE-2021-34527.</p>
Known exploited
CVSS Score
8.8
EPSS Score
0.943
Published
2021-07-02
CVE-2021-30554
Use after free in WebGL in Google Chrome prior to 91.0.4472.114 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.
Known exploited
CVSS Score
8.8
EPSS Score
0.246
Published
2021-07-02
CVE-2021-30551
Type confusion in V8 in Google Chrome prior to 91.0.4472.101 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.
Known exploited
CVSS Score
8.8
EPSS Score
0.763
Published
2021-06-15