SB2023090648 - Ubuntu update for linux
Published: September 6, 2023
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 11 secuirty vulnerabilities.
1) Use-after-free (CVE-ID: CVE-2023-21255)
The vulnerability allows a local application to escalate privileges on the system.
The
vulnerability exists due to insufficient validation of user-supplied
input within the binder_transaction_buffer_release() function in Binder subsystem in Android kernel. A local application
can trigger a use-after-fee error and execute arbitrary code with elevated privileges.
2) NULL pointer dereference (CVE-ID: CVE-2023-2898)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to a NULL pointer dereference error within the f2fs_write_end_io() function in fs/f2fs/data.c. A local user can pass specially crafted data to the system and perform a denial of service (DoS) attack.
3) Deadlock (CVE-ID: CVE-2023-31084)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to a deadlock in drivers/media/dvb-core/dvb_frontend.c when a task is in !TASK_RUNNING. A local user can trigger a deadlock and crash the kernel.
4) Resource exhaustion (CVE-ID: CVE-2023-32247)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to ksmbd does not properly control consumption of internal resources when handling SMB2_SESSION_SETUP commands. A remote attacker can send specially crafted data to the server during session setup, trigger memory exhaustion and perform a denial of service (DoS) attack.
5) Race condition (CVE-ID: CVE-2023-32250)
The vulnerability allows a remote attacker to compromise the affected system.
The vulnerability exists due to a race condition within the fs/ksmbd/connection.c in ksmbd in Linux kernel when processing SMB2_SESSION_SETUP commands. A remote attacker can exploit the race by sending concurrent session setup and logoff request and execute arbitrary code on the system.
6) NULL pointer dereference (CVE-ID: CVE-2023-32252)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a NULL pointer dereference error when handling SMB2_LOGOFF commands in ksmbd. A remote attacker can send specially crafted data to the server and perform a denial of service (DoS) attack.
7) Race condition (CVE-ID: CVE-2023-32257)
The vulnerability allows a remote attacker to compromise the affected system.
The vulnerability exists due to a race condition when handling SMB2_SESSION_SETUP and SMB2_LOGOFF commands. A remote attacker can send specially crafted data to the affected server, trigger a race condition and execute arbitrary code on the system.
8) Race condition (CVE-ID: CVE-2023-32258)
The vulnerability allows a remote attacker to compromise the affected system.
The vulnerability exists due to a race condition when processing SMB2_LOGOFF and SMB2_CLOSE commands in ksmbd. A remote attacker can send specially crafted data to the server and execute arbitrary code on the system.
9) Out-of-bounds read (CVE-ID: CVE-2023-38426)
The vulnerability allows a remote attacker to gain access to potentially sensitive information or perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary condition within the smb2_find_context_vals() function. A remote attacker can send specially crafted data to the server, trigger an out-of-bounds read error and read contents of memory on the system or perform a denial of service (DoS) attack.
10) Out-of-bounds read (CVE-ID: CVE-2023-38428)
The vulnerability allows a remote attacker to gain access to potentially sensitive information or perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary condition in fs/ksmbd/smb2pdu.c. A remote attacker can send specially crafted data to the server, trigger an out-of-bounds read error and read contents of memory on the system or perform a denial of service (DoS) attack.
11) Off-by-one (CVE-ID: CVE-2023-38429)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to an off-by-one error within the ksmbd_smb2_check_message() function in fs/ksmbd/connection.c. A remote attacker can trigger an off-by-one error and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Remediation
Install update from vendor's website.