CVE-2023-31096 Memory corruption in n/a
Local attackers can exploit a stack overflow in the Broadcom LSI Soft Modem kernel driver to escalate privileges to SYSTEM and bypass security protections.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2023-31096?
CVE-2023-31096 is a high-severity memory corruption vulnerability in n/a, published on 10 Oct 2023. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Weakness: CWE-787
Which versions are affected by CVE-2023-31096?
It affects 1 product.
Products include Broadcom Lsi Pci-Sv92ex Firmware.
How do I fix CVE-2023-31096?
No fix has been published for CVE-2023-31096 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2023-31096 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-31096 exists.
Sources
Also known as GHSA-6hxc-fm22-74v5.