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MitreVULNRICHMENT:CVE-2023-31096

HistoryOct 10, 2023 - 12:00 a.m.

CVE-2023-31096

2023-10-1000:00:00

mitre

github.com

broadcom lsi pci-sv92ex

local privilege escalation

kernel driver

stack overflow

rtlcopymemory

ioctl

system

ppl

ransomware

AI Score

Confidence

Low

SSVC

Exploitation

poc

Automatable

Technical Impact

total

JSON

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.

ADP Affected

[
  {
    "cpes": [
      "cpe:2.3:o:broadcom:lsi_pci-sv92ex_firmware:2.2.100.1:*:*:*:*:*:*:*"
    ],
    "vendor": "broadcom",
    "product": "lsi_pci-sv92ex_firmware",
    "versions": [
      {
        "status": "affected",
        "version": "2.2.100.1"
      }
    ],
    "defaultStatus": "unknown"
  }
]

References

cschwarz1.github.io/posts/0x04/

www.broadcom.com