// For flags

CVE-2023-31096

 

Severity Score

7.8
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

1
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Attend
*SSVC
Descriptions

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.

Se descubrió un problema en Broadcom) LSI PCI-SV92EX Soft Modem Kernel Driver hasta 2.2.100.1 (también conocido como AGRSM64.sys). Hay una escalada de privilegios local al SYSTEM a través de un desbordamiento de pila en RTLCopyMemory (IOCTL 0x1b2150). Un atacante puede aprovechar esto para elevar los privilegios de un proceso de integridad media al SYSTEM. Esto también se puede utilizar para omitir protecciones a nivel de kernel como AV o PPL, porque el código de explotación se ejecuta con privilegios de alta integridad y se puede utilizar en campañas coordinadas de ransomware BYOVD (traiga su propio controlador vulnerable).

*Credits: N/A
CVSS Scores
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
* Common Vulnerability Scoring System
SSVC
  • Decision:Attend
Exploitation
Poc
Automatable
No
Tech. Impact
Total
* Organization's Worst-case Scenario
Timeline
  • 2023-04-24 CVE Reserved
  • 2023-10-10 CVE Published
  • 2023-10-19 EPSS Updated
  • 2024-09-19 CVE Updated
  • 2024-09-19 First Exploit
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
CWE
  • CWE-787: Out-of-bounds Write
CAPEC
References (2)
URL Tag Source
https://www.broadcom.com Not Applicable
URL Date SRC
https://cschwarz1.github.io/posts/0x04 2024-09-19
URL Date SRC
URL Date SRC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Broadcom
Search vendor "Broadcom"
 Lsi Pci-sv92ex Firmware
Search vendor "Broadcom" for product "Lsi Pci-sv92ex Firmware"
 <= 2.2.100.1
Search vendor "Broadcom" for product "Lsi Pci-sv92ex Firmware" and version " <= 2.2.100.1"
-
Affected
in Broadcom
Search vendor "Broadcom"
 Lsi Pci-sv92ex
Search vendor "Broadcom" for product "Lsi Pci-sv92ex"
--
Safe