SB2023073113 - Debian update for linux

Description

This security bulletin contains information about 3 secuirty vulnerabilities.

1) Use-after-free (CVE-ID: CVE-2023-20593)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error in AMD Zen2 processors. A local user can trigger a use-after-free error and execute arbitrary code on the system.

Note, the vulnerability was dubbed Zenbleed.

2) Use-after-free (CVE-ID: CVE-2023-3390)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error within net/netfilter/nf_tables_api.c in the Linux kernel netfilter subsystem. A local user can trigger a use-after-fee error and escalate privileges on the system.

3) Use-after-free (CVE-ID: CVE-2023-3610)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error within the nf_tables component in Linux kernel netfilter. A local user with CAP_NET_ADMIN capability can trigger a use-after-free error and execute arbitrary code with elevated privileges.

Remediation

Install update from vendor's website.

References

• https://www.debian.org/security/2023/dsa-5461