CVE-2023-31096
Last modified
CVE-2023-31096 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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). EPSS estimates a 0.45% chance of exploitation in the next 30 days.
Description
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.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Broadcom | Lsi Pci-Sv92ex Firmware | <= 2.2.100.1 |
References
- https://cschwarz1.github.io/posts/0x04/Exploit, Third Party Advisory
- https://www.broadcom.comNot Applicable
- https://cschwarz1.github.io/posts/0x04/Exploit, Third Party Advisory
- https://www.broadcom.comNot Applicable
Timeline
- Published
- Last Modified
- Status
- Modified
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