Overview
- 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.
- Source
- cve@mitre.org
- NVD status
- Analyzed
Risk scores
CVSS 3.1
- Type
- Primary
- Base score
- 7.8
- Impact score
- 5.9
- Exploitability score
- 1.8
- Vector string
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Severity
- HIGH
Weaknesses
- nvd@nist.gov
- CWE-787
Social media
- Hype score
- Not currently trending
Configurations
[
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:broadcom:lsi_pci-sv92ex:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "9EE609F6-C73C-4152-B748-4860C45D8BB7"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:broadcom:lsi_pci-sv92ex_firmware:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "B800F3FF-2B88-4135-9E76-CDA5B582F00D",
"versionEndIncluding": "2.2.100.1"
}
],
"operator": "OR"
}
],
"operator": "AND"
}
]