September Patch Tuesday addresses 79 CVEs

Microsoft on Tuesday released 79 patches touching eleven product families. Seven of those issues, affecting Azure, SharePoint, and Windows, are considered by Microsoft to be of critical severity. At press time, three of the issues addressed are known to be under exploit in the wild, with a fourth issue not itself under exploit, but intertwined with issues that are. (For details on this unusual situation, please see the “Notable September updates” section below.) Microsoft assesses that 11 CVEs, all in Windows, are by the company’s estimation more likely to be exploited in the next 30 days. Eight of this month’s issues are amenable to detection by Sophos protections, and we include information on those in a table below.
In addition to these patches, the release includes advisory information on three CVEs addressed by patches from Adobe, affecting Reader and ColdFusion; one of the Reader vulnerabilities CVE-2024-41869) is a critical-severity use-after-free with a workable exploit already available in the wild. We are as always including at the end of this post additional appendices listing all Microsoft’s patches, sorted by severity, by predicted exploitability, and by product family.
By the numbers

Total CVEs: 79
Total Adobe advisories covered in update: 3
Publicly disclosed: 1
Exploited detected: 4*
Severity

Critical: 7
Important: 71
Moderate: 1

Impact

Elevation of privilege: 30
Remote code execution: 23
Information disclosure: 11
Denial of service: 8
Security feature bypass: 4
Spoofing: 3

CVSS base score 9.0 or greater: 2
CVSS base score 8.0 or greater: 24

* For information on why we count CVE-2024-43491 as this month’s fourth exploited-detected CVE despite the CVE itself not being detected as under exploit, please see the “Notable September updates” section below.

Figure 1: This month’s critical-severity patches include one for which exploitation has already been detected, and two more for which exploitation is more likely within the next 30 days
Product families

Windows: 47
SQL Server: 13
Azure: 6
SharePoint: 5
Office: 4
365: 2
Dynamics 365: 2
Microsoft AutoUpdate (MAU) for Mac: 1
Outlook for iOS: 1
Power BI: 1
Visio: 1

As is our custom for this list, CVEs that apply to more than one product family are counted once for each family they affect.

Figure 2: Though Windows as usual leads the list of affected product families, a collection of Native Scoring issues in SQL Server contributed to that product taking 13 patches of its own
Notable September updates
In addition to the issues discussed above, a number of specific items merit attention.
CVE-2024-38217 — Windows Mark of the Web Security Feature Bypass VulnerabilityCVE-2024-43492 — Windows Mark of the Web Security Feature Bypass Vulnerability
There are patches for two Mark of the Web vulnerabilities this month, and both are either currently under active exploit in the wild (CVE-2024-38217) or judged by Microsoft as more likely to be exploited within the next 30 days (CVE-2024-43492). The latter bug was found in-house at Microsoft and is considered to be of moderate severity. The former, however, was disclosed responsibly by Elastic Security’s Joe Desimone, who has posted about the discovery and the reporting process, and which may be of interest to those who follow issues around code-signing certificates. The bug affects all versions of Windows including Win 11H24 and is of important severity.
CVE-2024-38014 — Windows Installer Elevation of Privilege Vulnerability
This issue is under active exploit in the wild. It affects all versions of Windows including Win 11H24.
CVE-2024-43491 – Microsoft Windows Update Remote Code Execution Vulnerability
The good news is that this issue affects only certain operational components of Windows 10, version 1507 (first released in July 2015); only two versions of that build, Windows 10 Enterprise 2015 LTSB and Windows 10 IoT Enterprise 2015 LTSB, are still under support. The bad news, for those still running either of those versions, is that critical-severity remote code execution issue, which carries a 9.8 CVE base score, occurs in… the Windows Servicing Stack. It’s a fascinating issue for those who care about such things — rather than a coding error per se, Microsoft explains that the build version numbers themselves “crossed into a range that triggered a code defect in the Windows 10 (version 1507) servicing stack that handles the applicability of Optional Components. As a result, any Optional Component that was serviced with updates released since March 12, 2024 (KB5035858) was detected as “not applicable” by the servicing stack and was reverted to its RTM version.” If this issue is applicable to your estate, it is recommended that you closely read and follow the information Microsoft provides in KB5043083, as the patch sequence one must follow is precise. That page also includes a list of the specific optional components affected, which may help clarify your exposure.
[29 CVEs] — Windows 11 24H2 patches
Even though Windows 11 24H2 is not yet in general release, just over a third of this month’s patches affect that platform, including two (CVE-2024-38014, CVE-2024-38217) for which exploitation has already been detected in the wild. Users of the new Copilot+ PCs who do not ingest their patches automatically should be sure to update their devices.
[0 CVEs] — .NET, Visual Studio, Edge / Chromium, non-iOS Outlook
A rare month of respite for .NET and Visual Studio, with no patches released for those families. Nor are there any this time around related to Edge, or to Outlook for platforms other than Apple’s.

Figure 3: Despite the predominance of EoP issues in recent months, RCE continues to lead the pack as we reach the three-quarter mark for 2024.
Sophos protections

CVE
Sophos Intercept X/Endpoint IPS
Sophos XGS Firewall

CVE-2024-38237
Exp/2438237-A
Exp/2438237-A

CVE-2024-38238
Exp/2438238-A
Exp/2438238-A

CVE-2024-38241
Exp/2438241-A
Exp/2438241-A

CVE-2024-38242
Exp/2438242-A
Exp/2438242-A

CVE-2024-38243
Exp/2438243-A
Exp/2438243-A

CVE-2024-38244
Exp/2438244-A
Exp/2438244-A

CVE-2024-38245
Exp/2438245-A
Exp/2438245-A

CVE-2024-43461
SID:2310127
SID:2310126

As you can every month, if you don’t want to wait for your system to pull down Microsoft’s updates itself, you can download them manually from the Windows Update Catalog website. Run the winver.exe tool to determine which build of Windows 10 or 11 you’re running, then download the Cumulative Update package for your specific system’s architecture and build number.
Appendix A: Vulnerability Impact and Severity
This is a list of September patches sorted by impact, then sub-sorted by severity. Each list is further arranged by CVE.
Elevation of Privilege (30 CVEs)

Critical severity

CVE-2024-38194
Azure Web Apps Elevation of Privilege Vulnerability

CVE-2024-38216
Azure Stack Hub Elevation of Privilege Vulnerability

CVE-2024-38220
Azure Stack Hub Elevation of Privilege Vulnerability

Important severity

CVE-2024-37341
Microsoft SQL Server Elevation of Privilege Vulnerability

CVE-2024-37965
Microsoft SQL Server Elevation of Privilege Vulnerability

CVE-2024-37980
Microsoft SQL Server Elevation of Privilege Vulnerability

CVE-2024-38014
Windows Installer Elevation of Privilege Vulnerability

CVE-2024-38046
PowerShell Elevation of Privilege Vulnerability

CVE-2024-38188
Azure Network Watcher VM Agent Elevation of Privilege Vulnerability

CVE-2024-38225
Microsoft Dynamics 365 Business Central Elevation of Privilege Vulnerability

CVE-2024-38237
Kernel Streaming WOW Thunk Service Driver Elevation of Privilege Vulnerability

CVE-2024-38238
Kernel Streaming Service Driver Elevation of Privilege Vulnerability

CVE-2024-38239
Windows Kerberos Elevation of Privilege Vulnerability

CVE-2024-38240
Windows Remote Access Connection Manager Elevation of Privilege Vulnerability

CVE-2024-38241
Kernel Streaming Service Driver Elevation of Privilege Vulnerability

CVE-2024-38242
Kernel Streaming Service Driver Elevation of Privilege Vulnerability

CVE-2024-38243
Kernel Streaming Service Driver Elevation of Privilege Vulnerability

CVE-2024-38244
Kernel Streaming Service Driver Elevation of Privilege Vulnerability

CVE-2024-38245
Kernel Streaming Service Driver Elevation of Privilege Vulnerability

CVE-2024-38246
Win32k Elevation of Privilege Vulnerability

CVE-2024-38247
Windows Graphics Component Elevation of Privilege Vulnerability

CVE-2024-38248
Windows Storage Elevation of Privilege Vulnerability

CVE-2024-38249
Windows Graphics Component Elevation of Privilege Vulnerability

CVE-2024-38250
Windows Graphics Component Elevation of Privilege Vulnerability

CVE-2024-38252
Windows Win32 Kernel Subsystem Elevation of Privilege Vulnerability

CVE-2024-38253
Windows Win32 Kernel Subsystem Elevation of Privilege Vulnerability

CVE-2024-43457
Windows Setup and Deployment Elevation of Privilege Vulnerability

CVE-2024-43465
Microsoft Excel Elevation of Privilege Vulnerability

CVE-2024-43470
Azure Network Watcher VM Agent Elevation of Privilege Vulnerability

CVE-2024-43492
Microsoft AutoUpdate (MAU) Elevation of Privilege Vulnerability

Remote Code Execution (23 CVEs)

Critical severity

CVE-2024-38018
Microsoft SharePoint Server Remote Code Execution Vulnerability

CVE-2024-38119
Windows Network Address Translation (NAT) Remote Code Execution Vulnerability

CVE-2024-43464
Microsoft SharePoint Server Remote Code Execution Vulnerability

CVE-2024-43491
Microsoft Windows Update Remote Code Execution Vulnerability

Important severity

CVE-2024-21416
Windows TCP/IP Remote Code Execution Vulnerability

CVE-2024-26186
Microsoft SQL Server Native Scoring Remote Code Execution Vulnerability

CVE-2024-26191
Microsoft SQL Server Native Scoring Remote Code Execution Vulnerability

CVE-2024-37335
Microsoft SQL Server Native Scoring Remote Code Execution Vulnerability

CVE-2024-37338
Microsoft SQL Server Native Scoring Remote Code Execution Vulnerability

CVE-2024-37339
Microsoft SQL Server Native Scoring Remote Code Execution Vulnerability

CVE-2024-37340
Microsoft SQL Server Native Scoring Remote Code Execution Vulnerability

CVE-2024-38045
Windows TCP/IP Remote Code Execution Vulnerability

CVE-2024-38227
Microsoft SharePoint Server Remote Code Execution Vulnerability

CVE-2024-38228
Microsoft SharePoint Server Remote Code Execution Vulnerability

CVE-2024-38259
Microsoft Management Console Remote Code Execution Vulnerability

CVE-2024-38260
Windows Remote Desktop Licensing Service Remote Code Execution Vulnerability

CVE-2024-38263
Windows Remote Desktop Licensing Service Remote Code Execution Vulnerability

CVE-2024-43454
Windows Remote Desktop Licensing Service Remote Code Execution Vulnerability

CVE-2024-43463
Microsoft Office Visio Remote Code Execution Vulnerability

CVE-2024-43467
Windows Remote Desktop Licensing Service Remote Code Execution Vulnerability

CVE-2024-43469
Azure CycleCloud Remote Code Execution Vulnerability

CVE-2024-43479
Microsoft Power Automate Desktop Remote Code Execution Vulnerability

CVE-2024-43495
Windows libarchive Remote Code Execution Vulnerability

Information Disclosure (11 CVEs)

Important severity

CVE-2024-37337
Microsoft SQL Server Native Scoring Information Disclosure Vulnerability

CVE-2024-37342
Microsoft SQL Server Native Scoring Information Disclosure Vulnerability

CVE-2024-37966
Microsoft SQL Server Native Scoring Information Disclosure Vulnerability

CVE-2024-38254
Windows Authentication Information Disclosure Vulnerability

CVE-2024-38256
Windows Kernel-Mode Driver Information Disclosure Vulnerability

CVE-2024-38257
Microsoft AllJoyn API Information Disclosure Vulnerability

CVE-2024-38258
Windows Remote Desktop Licensing Service Information Disclosure Vulnerability

CVE-2024-43458
Windows Networking Information Disclosure Vulnerability

CVE-2024-43474
Microsoft SQL Server Information Disclosure Vulnerability

CVE-2024-43475
Microsoft Windows Admin Center Information Disclosure Vulnerability

CVE-2024-43482
Microsoft Outlook for iOS Information Disclosure Vulnerability

Denial of Service (8 CVEs)

Important severity

CVE-2024-38230
Windows Standards-Based Storage Management Service Denial of Service Vulnerability

CVE-2024-38231
Windows Remote Desktop Licensing Service Denial of Service Vulnerability

CVE-2024-38232
Windows Networking Denial of Service Vulnerability

CVE-2024-38233
Windows Networking Denial of Service Vulnerability

CVE-2024-38234
Windows Networking Denial of Service Vulnerability

CVE-2024-38235
Windows Hyper-V Denial of Service Vulnerability

CVE-2024-38236
DHCP Server Service Denial of Service Vulnerability

CVE-2024-43466
Microsoft SharePoint Server Denial of Service Vulnerability

Security Feature Bypass (4 CVEs)

Important severity

CVE-2024-30073
Windows Security Zone Mapping Security Feature Bypass Vulnerability

CVE-2024-38217
Windows Mark of the Web Security Feature Bypass Vulnerability

CVE-2024-38226
Microsoft Publisher Security Features Bypass Vulnerability

Moderate severity

CVE-2024-43487
Windows Mark of the Web Security Feature Bypass Vulnerability

Spoofing (3 CVEs)

Important severity

CVE-2024-43455
Windows Remote Desktop Licensing Service Spoofing Vulnerability

CVE-2024-43461
Windows MSHTML Platform Spoofing Vulnerability

CVE-2024-43476
Microsoft Dynamics 365 (on-premises) Cross-site Scripting Vulnerability

Appendix B: Exploitability
This is a list of the September CVEs judged by Microsoft to be either under exploitation in the wild or more likely to be exploited in the wild within the first 30 days post-release. The list is arranged by CVE. In the case of CVE-2024-43491, the issue itself is not known to be under active exploit, but certain of the issues fixed by the rejected servicing-stack updates are, so we are choosing to include it on this list. (Please see the “Notable September updates” section above for context.)

Exploitation detected

CVE-2024-38014
Windows Installer Elevation of Privilege Vulnerability

CVE-2024-38217
Windows Mark of the Web Security Feature Bypass Vulnerability

CVE-2024-38226
Microsoft Publisher Security Features Bypass Vulnerability

CVE-2024-43491
Microsoft Windows Update Remote Code Execution Vulnerability

Exploitation more likely within the next 30 days