SUSE update for the Linux Kernel

Published: 2023-02-15

Risk	Medium
Patch available	YES
Number of vulnerabilities	9
CVE-ID	CVE-2018-9517 CVE-2022-3564 CVE-2022-3643 CVE-2022-42895 CVE-2022-42896 CVE-2022-4662 CVE-2022-47929 CVE-2023-23454 CVE-2023-23455
CWE-ID	CWE-416 CWE-20 CWE-824 CWE-284 CWE-476 CWE-843
Exploitation vector	Local network
Public exploit	N/A
Vulnerable software Subscribe	SUSE Linux Enterprise Server Operating systems & Components / Operating system kernel-source Operating systems & Components / Operating system package or component kernel-macros Operating systems & Components / Operating system package or component kernel-devel Operating systems & Components / Operating system package or component kernel-syms Operating systems & Components / Operating system package or component kernel-default-devel Operating systems & Components / Operating system package or component kernel-default-debugsource Operating systems & Components / Operating system package or component kernel-default-debuginfo Operating systems & Components / Operating system package or component kernel-default-base-debuginfo Operating systems & Components / Operating system package or component kernel-default-base Operating systems & Components / Operating system package or component kernel-default Operating systems & Components / Operating system package or component
Vendor	SUSE

Security Bulletin

This security bulletin contains information about 9 vulnerabilities.

1) Use-after-free

EUVDB-ID: #VU19987

Risk: Low

CVSSv3.1: 6.8 [CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-9517

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

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

The vulnerability exists due to a use-after-free error in pppol2tp_connect. A local user can trigger memory corruption and escalate privileges on the system.

Mitigation

Update the affected package the Linux Kernel to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Server: 12-SP2-BCL

kernel-source: before 4.4.121-92.199.1

kernel-macros: before 4.4.121-92.199.1

kernel-devel: before 4.4.121-92.199.1

kernel-syms: before 4.4.121-92.199.1

kernel-default-devel: before 4.4.121-92.199.1

kernel-default-debugsource: before 4.4.121-92.199.1

kernel-default-debuginfo: before 4.4.121-92.199.1

kernel-default-base-debuginfo: before 4.4.121-92.199.1

kernel-default-base: before 4.4.121-92.199.1

kernel-default: before 4.4.121-92.199.1

External links

http://www.suse.com/support/update/announcement/2023/suse-su-20230420-1/

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.

2) Use-after-free

EUVDB-ID: #VU69799

Risk: Low

CVSSv3.1: 5.9 [CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-3564

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows an attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error within the l2cap_reassemble_sdu() function in net/bluetooth/l2cap_core.c. An attacker with physical access to device can trigger a use-after-free error and execute arbitrary code on the system.

Mitigation

Update the affected package the Linux Kernel to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Server: 12-SP2-BCL

kernel-source: before 4.4.121-92.199.1

kernel-macros: before 4.4.121-92.199.1

kernel-devel: before 4.4.121-92.199.1

kernel-syms: before 4.4.121-92.199.1

kernel-default-devel: before 4.4.121-92.199.1

kernel-default-debugsource: before 4.4.121-92.199.1

kernel-default-debuginfo: before 4.4.121-92.199.1

kernel-default-base-debuginfo: before 4.4.121-92.199.1

kernel-default-base: before 4.4.121-92.199.1

kernel-default: before 4.4.121-92.199.1

External links

http://www.suse.com/support/update/announcement/2023/suse-su-20230420-1/

Q & A

Can this vulnerability be exploited remotely?

No. The attacker should have physical access to the system in order to successfully exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

3) Input validation error

EUVDB-ID: #VU70468

Risk: Medium

CVSSv3.1: 5.9 [CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-3643

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

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

The vulnerability exists due to insufficient validation of network packets. An attacker with access to the guest OS can trigger the related physical NIC on the host to reset, abort, or crash by sending certain kinds of packets.

Mitigation

Update the affected package the Linux Kernel to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Server: 12-SP2-BCL

kernel-source: before 4.4.121-92.199.1

kernel-macros: before 4.4.121-92.199.1

kernel-devel: before 4.4.121-92.199.1

kernel-syms: before 4.4.121-92.199.1

kernel-default-devel: before 4.4.121-92.199.1

kernel-default-debugsource: before 4.4.121-92.199.1

kernel-default-debuginfo: before 4.4.121-92.199.1

kernel-default-base-debuginfo: before 4.4.121-92.199.1

kernel-default-base: before 4.4.121-92.199.1

kernel-default: before 4.4.121-92.199.1

External links

http://www.suse.com/support/update/announcement/2023/suse-su-20230420-1/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

4) Access of Uninitialized Pointer

EUVDB-ID: #VU69796

Risk: Low

CVSSv3.1: 2.1 [CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-42895

CWE-ID: CWE-824 - Access of Uninitialized Pointer

Exploit availability: No

Description

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.

Mitigation

Update the affected package the Linux Kernel to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Server: 12-SP2-BCL

kernel-source: before 4.4.121-92.199.1

kernel-macros: before 4.4.121-92.199.1

kernel-devel: before 4.4.121-92.199.1

kernel-syms: before 4.4.121-92.199.1

kernel-default-devel: before 4.4.121-92.199.1

kernel-default-debugsource: before 4.4.121-92.199.1

kernel-default-debuginfo: before 4.4.121-92.199.1

kernel-default-base-debuginfo: before 4.4.121-92.199.1

kernel-default-base: before 4.4.121-92.199.1

kernel-default: before 4.4.121-92.199.1

External links

http://www.suse.com/support/update/announcement/2023/suse-su-20230420-1/

Q & A

Can this vulnerability be exploited remotely?

No. The attacker should have physical access to the system in order to successfully exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

5) Use-after-free

EUVDB-ID: #VU69795

Risk: Low

CVSSv3.1: 5.9 [CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-42896

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows an attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error within the l2cap_connect() and l2cap_le_connect_req() function in net/bluetooth/l2cap_core.c. An attacker with physical proximity to the affected device can trigger a use-after-free error and execute arbitrary code on the system.

Mitigation

Update the affected package the Linux Kernel to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Server: 12-SP2-BCL

kernel-source: before 4.4.121-92.199.1

kernel-macros: before 4.4.121-92.199.1

kernel-devel: before 4.4.121-92.199.1

kernel-syms: before 4.4.121-92.199.1

kernel-default-devel: before 4.4.121-92.199.1

kernel-default-debugsource: before 4.4.121-92.199.1

kernel-default-debuginfo: before 4.4.121-92.199.1

kernel-default-base-debuginfo: before 4.4.121-92.199.1

kernel-default-base: before 4.4.121-92.199.1

kernel-default: before 4.4.121-92.199.1

External links

http://www.suse.com/support/update/announcement/2023/suse-su-20230420-1/

Q & A

Can this vulnerability be exploited remotely?

No. The attacker should have physical access to the system in order to successfully exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

6) Improper access control

EUVDB-ID: #VU71541

Risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-4662

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: No

Description

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

The vulnerability exists due to improper access restrictions in the Linux kernel USB core subsystem in the way user attaches usb device. A local user can perform a denial of service (DoS) attack.

Mitigation

Update the affected package the Linux Kernel to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Server: 12-SP2-BCL

kernel-source: before 4.4.121-92.199.1

kernel-macros: before 4.4.121-92.199.1

kernel-devel: before 4.4.121-92.199.1

kernel-syms: before 4.4.121-92.199.1

kernel-default-devel: before 4.4.121-92.199.1

kernel-default-debugsource: before 4.4.121-92.199.1

kernel-default-debuginfo: before 4.4.121-92.199.1

kernel-default-base-debuginfo: before 4.4.121-92.199.1

kernel-default-base: before 4.4.121-92.199.1

kernel-default: before 4.4.121-92.199.1

External links

http://www.suse.com/support/update/announcement/2023/suse-su-20230420-1/

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.

7) NULL pointer dereference

EUVDB-ID: #VU71479

Risk: Medium

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-47929

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

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

The vulnerability exists due to a NULL pointer dereference error in the traffic control subsystem in Linux kernel. A local user can pass pass a specially crafted traffic control configuration that is set up with "tc qdisc" and "tc class" commands and perform a denial of service (DoS) attack.

Mitigation

Update the affected package the Linux Kernel to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Server: 12-SP2-BCL

kernel-source: before 4.4.121-92.199.1

kernel-macros: before 4.4.121-92.199.1

kernel-devel: before 4.4.121-92.199.1

kernel-syms: before 4.4.121-92.199.1

kernel-default-devel: before 4.4.121-92.199.1

kernel-default-debugsource: before 4.4.121-92.199.1

kernel-default-debuginfo: before 4.4.121-92.199.1

kernel-default-base-debuginfo: before 4.4.121-92.199.1

kernel-default-base: before 4.4.121-92.199.1

kernel-default: before 4.4.121-92.199.1

External links

http://www.suse.com/support/update/announcement/2023/suse-su-20230420-1/

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.

8) Type Confusion

EUVDB-ID: #VU71478

Risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-23454

CWE-ID: CWE-843 - Type confusion

Exploit availability: No

Description

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

The vulnerability exists due to a type confusion error within the cbq_classify() function in net/sched/sch_cbq.c in the Linux kernel. A local user can trigger a type confusion error and crash the kernel.

Mitigation

Update the affected package the Linux Kernel to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Server: 12-SP2-BCL

kernel-source: before 4.4.121-92.199.1

kernel-macros: before 4.4.121-92.199.1

kernel-devel: before 4.4.121-92.199.1

kernel-syms: before 4.4.121-92.199.1

kernel-default-devel: before 4.4.121-92.199.1

kernel-default-debugsource: before 4.4.121-92.199.1

kernel-default-debuginfo: before 4.4.121-92.199.1

kernel-default-base-debuginfo: before 4.4.121-92.199.1

kernel-default-base: before 4.4.121-92.199.1

kernel-default: before 4.4.121-92.199.1

External links

http://www.suse.com/support/update/announcement/2023/suse-su-20230420-1/

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.

9) Type Confusion

EUVDB-ID: #VU71477

Risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-23455

CWE-ID: CWE-843 - Type confusion

Exploit availability: No

Description

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

The vulnerability exists due to a type confusion error within the atm_tc_enqueue() function in net/sched/sch_atm.c in the Linux kernel. A local user can trigger a type confusion error and perform a denial of service (DoS) attack.

Mitigation

Update the affected package the Linux Kernel to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Server: 12-SP2-BCL

kernel-source: before 4.4.121-92.199.1

kernel-macros: before 4.4.121-92.199.1

kernel-devel: before 4.4.121-92.199.1

kernel-syms: before 4.4.121-92.199.1

kernel-default-devel: before 4.4.121-92.199.1

kernel-default-debugsource: before 4.4.121-92.199.1

kernel-default-debuginfo: before 4.4.121-92.199.1

kernel-default-base-debuginfo: before 4.4.121-92.199.1

kernel-default-base: before 4.4.121-92.199.1

kernel-default: before 4.4.121-92.199.1

External links

http://www.suse.com/support/update/announcement/2023/suse-su-20230420-1/

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.