SB2023021651 - Ubuntu update for linux-azure 

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Main Vulnerability Database SB2023021651

SB2023021651 - Ubuntu update for linux-azure

Published: February 16, 2023

Security Bulletin ID SB2023021651
Severity
Medium
Patch available
YES
Number of vulnerabilities 5
Exploitation vector Physical access
Highest impact Code execution

Breakdown by Severity

Medium 20% Low 80%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 5 secuirty vulnerabilities.


1) Memory leak (CVE-ID: CVE-2022-3619)

The vulnerability allows an attacker to perform a DoS attack.

The vulnerability exists due memory leak within the l2cap_recv_acldata() function in net/bluetooth/l2cap_core.c. An attacker with physical proximity to device can force the system to leak memory and perform denial of service attack.


2) Buffer overflow (CVE-ID: CVE-2022-3628)

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

The vulnerability exists due to a boundary error within the brcmf_fweh_event_worker() function in drivers/net/wireless/broadcom/brcm80211/brcmfmac/fweh.c. A local user can use a specially crafted device to trigger memory corruption and escalate privileges on the system.



3) Use-after-free (CVE-ID: CVE-2022-3640)

The vulnerability allows an attacker to compromise the affected system.

The vulnerability exists due to a use-after-free error in the 2cap_conn_del() function in net/bluetooth/l2cap_core.c in Linux kernel. An attacker with physical proximity to device can trigger a use-after-free error and execute arbitrary code on the system.



4) Access of Uninitialized Pointer (CVE-ID: CVE-2022-42895)

The vulnerability allows an attacker to gain access to sensitive information.

The vulnerability exists due to unauthorized access of uninitialized pointer within the l2cap_parse_conf_req() function in net/bluetooth/l2cap_core.c. An attacker with physical proximity to the affected device can gain access to sensitive information.


5) Use-after-free (CVE-ID: CVE-2023-0590)

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to a use-after-free error within the qdisc_graft() function in net/sched/sch_api.c. A local user can trigger a use-after-free error and crash the kernel.


Remediation

Install update from vendor's website.

References