Описание
MITRE: CVE-2023-31096 Windows Agere Soft Modem Driver Elevation of Privilege Vulnerability
Microsoft is aware of vulnerabilities in the third party Agere Soft Modem drivers that ship natively with supported Windows operating systems. This is an announcement of the removal of agrsm64.sys and agrsm.sys drivers. The drivers have been removed in the January 2026 cumulative update.
Soft modem hardware dependent on these specific drivers will no longer work on Windows.
Microsoft recommends removing any existing dependencies on this hardware.
This vulnerability was documented in 2023 via a CVE-2023-31096 issued by MITRE.
FAQ
What privileges could be gained by an attacker who successfully exploited this vulnerability?
An attacker who successfully exploited this vulnerability could gain SYSTEM privileges.
Is the vulnerability only exploitable if the Agere Soft Modem is actively being used?
No. All supported versions of Windows can be affected by a successful exploitation of this vulnerability, even if the modem is not actively being used.
Обновления
| Продукт | Статья | Обновление |
|---|---|---|
| Windows Server 2008 for 32-bit Systems Service Pack 2 | ||
| Windows Server 2008 for x64-based Systems Service Pack 2 | ||
| Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) | ||
| Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) | ||
| Windows Server 2008 R2 for x64-based Systems Service Pack 1 | ||
| Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) | ||
| Windows Server 2012 | ||
| Windows Server 2012 (Server Core installation) | ||
| Windows Server 2012 R2 | ||
| Windows Server 2012 R2 (Server Core installation) |
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Возможность эксплуатации
Publicly Disclosed
Exploited
Latest Software Release
EPSS
7.8 High
CVSS3
Связанные уязвимости
An issue was discovered in Broadcom) LSI PCI-SV92EX Soft Modem Kernel Driver through 2.2.100.1 (aka AGRSM64.sys). There is Local Privilege Escalation to SYSTEM via a Stack Overflow in RTLCopyMemory (IOCTL 0x1b2150). An attacker can exploit this to elevate privileges from a medium-integrity process to SYSTEM. This can also be used to bypass kernel-level protections such as AV or PPL, because exploit code runs with high-integrity privileges and can be used in coordinated BYOVD (bring your own vulnerable driver) ransomware campaigns.
An issue was discovered in Broadcom) LSI PCI-SV92EX Soft Modem Kernel Driver through 2.2.100.1 (aka AGRSM64.sys). There is Local Privilege Escalation to SYSTEM via a Stack Overflow in RTLCopyMemory (IOCTL 0x1b2150). An attacker can exploit this to elevate privileges from a medium-integrity process to SYSTEM. This can also be used to bypass kernel-level protections such as AV or PPL, because exploit code runs with high-integrity privileges and can be used in coordinated BYOVD (bring your own vulnerable driver) ransomware campaigns.
Уязвимость драйвера Agere Modem Driver операционных систем Windows, позволяющая нарушителю повысить свои привилегии
EPSS
7.8 High
CVSS3