#VU92008 Division by zero in Linux kernel
Vulnerability identifier: #VU92008
Vulnerability risk: Low
CVSSv3.1: 4.8 [AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-369
Exploitation vector: Local
Exploit availability: No
Vulnerable software:
Linux kernel
Operating systems & Components /
Operating system
Vendor: Linux Foundation
Description
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to a division by zero error within the sco_sock_clear_timer() and sco_conn_add() functions in net/bluetooth/sco.c, within the l2cap_finish_move(), l2cap_rx_state_wait_f() and l2cap_conn_add() functions in net/bluetooth/l2cap_core.c, within the iso_sock_sendmsg() function in net/bluetooth/iso.c, within the hci_cc_read_buffer_size(), hci_cc_le_read_buffer_size(), hci_cs_create_conn(), hci_conn_complete_evt(), hci_conn_request_evt(), hci_cc_le_read_buffer_size_v2(), le_conn_complete_evt(), hci_le_cis_req_evt(), hci_le_big_sync_established_evt() and hci_le_big_info_adv_report_evt() functions in net/bluetooth/hci_event.c, within the hci_conn_add(), hci_conn_add_unset(), hci_connect_le(), hci_add_bis(), hci_connect_le_scan(), hci_connect_acl(), hci_connect_sco(), hci_bind_cis() and hci_iso_qos_setup() functions in net/bluetooth/hci_conn.c. A local user can perform a denial of service (DoS) attack.
Mitigation
Install update from vendor's website.
Vulnerable software versions
Linux kernel:
External links
http://git.kernel.org/stable/c/ad3f7986c5a0f82b8b66a0afe1cc1f5421e1d674
http://git.kernel.org/stable/c/dfece2b4e3759759b2bdfac2cd6d0ee9fbf055f3
http://git.kernel.org/stable/c/d2b2f7d3936dc5990549bc36ab7ac7ac37f22c30
http://git.kernel.org/stable/c/a5b862c6a221459d54e494e88965b48dcfa6cc44
http://git.kernel.org/stable/c/4d3dbaa252257d20611c3647290e6171f1bbd6c8
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
