SB2024020948 - Ubuntu Kernel Live Patch
Published: February 9, 2024
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 5 secuirty vulnerabilities.
1) Use-after-free (CVE-ID: CVE-2023-5345)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the smb3_fs_context_parse_param() function in fs/smb/client component. A remote attacker can execute arbitrary code with elevated privileges.
2) Out-of-bounds write (CVE-ID: CVE-2023-6040)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a boundary error within the nf_tables_newtable() function in netfilter nf_tables. A local user can trigger an out-of-bounds write and execute arbitrary code with elevated privileges.
3) NULL pointer dereference (CVE-ID: CVE-2023-6176)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to a NULL pointer dereference error in the Linux kernel API for the cryptographic algorithm scatterwalk functionality in scatterwalk_copychunks(). A local user can send a malicious packet with specific socket configuration and crash the OS kernel.
4) Use-after-free (CVE-ID: CVE-2023-6817)
The vulnerability allows a local authenticated user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the netfilter nf_tables component in Linux kernel. A local authenticated user can trigger a use-after-free error and escalate privileges on the system.
5) Use-after-free (CVE-ID: CVE-2023-6932)
The vulnerability allows a local authenticated user to execute arbitrary code.
The vulnerability exists due to a use-after-free error within the ipv4 igmp component in Linux kernel. A local authenticated user can trigger a use-after-free error and execute arbitrary code.
Remediation
Install update from vendor's website.