SB2024060855 - Ubuntu update for linux

Description

This security bulletin contains information about 4 secuirty vulnerabilities.

1) Use-after-free (CVE-ID: CVE-2023-47233)

The vulnerability allows an attacker to escalate privileges on the system.

The vulnerability exists due to a use-after-free error within the brcm80211 in a brcmf_cfg80211_detach in the device unplugging (disconnect the USB by hotplug) code. An attacker with physical access to device can trigger a use-after-free error and escalate privileges on the system.

2) Resource management error (CVE-ID: CVE-2024-26614)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to improper management of internal resources within the reqsk_queue_alloc() function in net/core/request_sock.c. A remote attacker can send specially crafted ACK packets to the system and perform a denial of service (DoS) attack.

3) Use-after-free (CVE-ID: CVE-2023-52530)

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

The vulnerability exists due to a use-after-free error within the ieee80211_key_link() function in net/mac80211/key.c, within the ieee80211_add_key() function in net/mac80211/cfg.c. A local user can escalate privileges on the system.

4) Use-after-free (CVE-ID: CVE-2024-26622)

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

The vulnerability exists due to a use-after-free error within the tomoyo_write_control() function. A local  user can trigger a use-after-free error and execute arbitrary code with elevated privileges.

Remediation

Install update from vendor's website.

References

• https://ubuntu.com/security/notices/USN-6776-1