SUSE update for the Linux Kernel (Live Patch 15 for SLE 15 SP2)

1) Improper Resource Shutdown or Release

EUVDB-ID: #VU59473

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-36322

CWE-ID: CWE-404 - Improper Resource Shutdown or Release

Exploit availability: No

Description

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

The vulnerability exists in the FUSE filesystem implementation in the Linux kernel due to fuse_do_getattr() calls make_bad_inode() in inappropriate situations. A local user can run a specially crafted program to trigger kernel crash.

Note, the vulnerability exists due to incomplete fix for #VU58207 (CVE-2021-28950).

Mitigation

Update the affected package the Linux Kernel (Live Patch 15 for SLE 15 SP2) to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Module for Live Patching: 15-SP2

kernel-livepatch-SLE15-SP2_Update_15-debugsource: before 2-2.1

kernel-livepatch-5_3_18-24_53_4-default-debuginfo: before 2-2.1

kernel-livepatch-5_3_18-24_53_4-default: before 2-2.1

CPE2.3

External links

https://www.suse.com/support/update/announcement/2021/suse-su-20212577-1/

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: #VU58332

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-36385

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 drivers/infiniband/core/ucma.c, because the ctx is reached via the ctx_list in some ucma_migrate_id situations where ucma_close is called. A local user can run a specially crafted program to trigger the use-after-free error and execute arbitrary code with elevated privileges.

Mitigation

Update the affected package the Linux Kernel (Live Patch 15 for SLE 15 SP2) to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Module for Live Patching: 15-SP2

kernel-livepatch-SLE15-SP2_Update_15-debugsource: before 2-2.1

kernel-livepatch-5_3_18-24_53_4-default-debuginfo: before 2-2.1

kernel-livepatch-5_3_18-24_53_4-default: before 2-2.1

CPE2.3

External links

https://www.suse.com/support/update/announcement/2021/suse-su-20212577-1/

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.

3) Out-of-bounds write

EUVDB-ID: #VU56017

Risk: Low

CVSSv4.0: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Clear]

CVE-ID: CVE-2021-22555

CWE-ID: CWE-787 - Out-of-bounds write

Exploit availability: Yes

Description

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

The vulnerability exists due to a boundary error when processing untrusted input in net/netfilter/x_tables.c in Linux kernel. A local user can run a specially crafted program to trigger an out-of-bounds write and execute arbitrary code with elevated privileges.

Mitigation

Update the affected package the Linux Kernel (Live Patch 15 for SLE 15 SP2) to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Module for Live Patching: 15-SP2

kernel-livepatch-SLE15-SP2_Update_15-debugsource: before 2-2.1

kernel-livepatch-5_3_18-24_53_4-default-debuginfo: before 2-2.1

kernel-livepatch-5_3_18-24_53_4-default: before 2-2.1

CPE2.3

External links

https://www.suse.com/support/update/announcement/2021/suse-su-20212577-1/

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?

Yes. This vulnerability is being exploited in the wild.

4) Race condition

EUVDB-ID: #VU53006

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-23133

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Exploit availability: No

Description

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

The vulnerability exists due to a race condition in Linux kernel SCTP sockets (net/sctp/socket.c). If sctp_destroy_sock is called without sock_net(sk)->sctp.addr_wq_lock then an element is removed from the auto_asconf_splist list without any proper locking. This can be exploited by a local user with network service privileges to escalate to root or from the context of an unprivileged user directly if a BPF_CGROUP_INET_SOCK_CREATE is attached which denies creation of some SCTP socket.

Mitigation

Update the affected package the Linux Kernel (Live Patch 15 for SLE 15 SP2) to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Module for Live Patching: 15-SP2

kernel-livepatch-SLE15-SP2_Update_15-debugsource: before 2-2.1

kernel-livepatch-5_3_18-24_53_4-default-debuginfo: before 2-2.1

kernel-livepatch-5_3_18-24_53_4-default: before 2-2.1

CPE2.3

External links

https://www.suse.com/support/update/announcement/2021/suse-su-20212577-1/

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.

5) Information disclosure

EUVDB-ID: #VU51453

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-27363

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

The vulnerability allows a local user to gain access to potentially sensitive information.

The vulnerability exists due to the show_transport_handle() shows iSCSI transport handle to non-root users. A local user can gain unauthorized access to sensitive information and use it along with another vulnerability, such as #VU51452, to escalate privileges on the system.

Mitigation

Update the affected package the Linux Kernel (Live Patch 15 for SLE 15 SP2) to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Module for Live Patching: 15-SP2

kernel-livepatch-SLE15-SP2_Update_15-debugsource: before 2-2.1

kernel-livepatch-5_3_18-24_53_4-default-debuginfo: before 2-2.1

kernel-livepatch-5_3_18-24_53_4-default: before 2-2.1

CPE2.3

External links

https://www.suse.com/support/update/announcement/2021/suse-su-20212577-1/

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.

6) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU51452

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-27364

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

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

The vulnerability exists due to iscsi_if_recv_msg() allows non-root users to connect and send commands to the Linux kernel. A local user can escalate privileges on the system.

Mitigation

Update the affected package the Linux Kernel (Live Patch 15 for SLE 15 SP2) to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Module for Live Patching: 15-SP2

kernel-livepatch-SLE15-SP2_Update_15-debugsource: before 2-2.1

kernel-livepatch-5_3_18-24_53_4-default-debuginfo: before 2-2.1

kernel-livepatch-5_3_18-24_53_4-default: before 2-2.1

CPE2.3

External links

https://www.suse.com/support/update/announcement/2021/suse-su-20212577-1/

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) Buffer overflow

EUVDB-ID: #VU51451

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-27365

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

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

The vulnerability exists due to a boundary error when processing Netlink messages in Linux kernel through 5.11.3, as certain iSCSI data structures do not have appropriate length constraints or checks, and can exceed the PAGE_SIZE value. A local unprivileged user can send a Netlink message that is associated with iSCSI, and has a length up to the maximum length of a Netlink message, trigger memory corruption and execute arbitrary code on the system with elevated privileges.

Mitigation

Update the affected package the Linux Kernel (Live Patch 15 for SLE 15 SP2) to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Module for Live Patching: 15-SP2

kernel-livepatch-SLE15-SP2_Update_15-debugsource: before 2-2.1

kernel-livepatch-5_3_18-24_53_4-default-debuginfo: before 2-2.1

kernel-livepatch-5_3_18-24_53_4-default: before 2-2.1

CPE2.3

External links

https://www.suse.com/support/update/announcement/2021/suse-su-20212577-1/

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) Out-of-bounds write

EUVDB-ID: #VU56817

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-28660

CWE-ID: CWE-787 - Out-of-bounds write

Exploit availability: No

Description

The vulnerability allows a local user to compromise vulnerable system.

The vulnerability exists due to a boundary error when processing untrusted input in the "rtw_wx_set_scan" in drivers/staging/rtl8188eu/os_dep/ioctl_linux.c. A local user can trigger out-of-bounds write and execute arbitrary code on the target system.

Mitigation

Update the affected package the Linux Kernel (Live Patch 15 for SLE 15 SP2) to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Module for Live Patching: 15-SP2

kernel-livepatch-SLE15-SP2_Update_15-debugsource: before 2-2.1

kernel-livepatch-5_3_18-24_53_4-default-debuginfo: before 2-2.1

kernel-livepatch-5_3_18-24_53_4-default: before 2-2.1

CPE2.3

External links

https://www.suse.com/support/update/announcement/2021/suse-su-20212577-1/

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) Improper Initialization

EUVDB-ID: #VU63658

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-28688

CWE-ID: CWE-665 - Improper Initialization

Exploit availability: No

Description

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

The vulnerability exists due to improper initialization of pointers such that subsequent cleanup code wouldn't use uninitialized or stale values. A local user can perform a denial of service attack.

Mitigation

Update the affected package the Linux Kernel (Live Patch 15 for SLE 15 SP2) to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Module for Live Patching: 15-SP2

kernel-livepatch-SLE15-SP2_Update_15-debugsource: before 2-2.1

kernel-livepatch-5_3_18-24_53_4-default-debuginfo: before 2-2.1

kernel-livepatch-5_3_18-24_53_4-default: before 2-2.1

CPE2.3

External links

https://www.suse.com/support/update/announcement/2021/suse-su-20212577-1/

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.

10) Command Injection

EUVDB-ID: #VU56241

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-29154

CWE-ID: CWE-77 - Command injection

Exploit availability: No

Description

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

The vulnerability exists due to incorrect computation of branch displacements within the BPF JIT compilers in the Linux kernel in arch/x86/net/bpf_jit_comp.c and arch/x86/net/bpf_jit_comp32.c. A local user can inject and execute arbitrary commands with elevated privileges.

Mitigation

Update the affected package the Linux Kernel (Live Patch 15 for SLE 15 SP2) to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Module for Live Patching: 15-SP2

kernel-livepatch-SLE15-SP2_Update_15-debugsource: before 2-2.1

kernel-livepatch-5_3_18-24_53_4-default-debuginfo: before 2-2.1

kernel-livepatch-5_3_18-24_53_4-default: before 2-2.1

CPE2.3

External links

https://www.suse.com/support/update/announcement/2021/suse-su-20212577-1/

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.

11) Race condition

EUVDB-ID: #VU55257

Risk: Low

CVSSv4.0: 4.4 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-32399

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Exploit availability: No

Description

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

The vulnerability exists due to a race condition for removal of the HCI controller within net/bluetooth/hci_request.c in the Linux kernel. A local user can exploit the race and gain unauthorized access to sensitive information and escalate privileges on the system.

Mitigation

Update the affected package the Linux Kernel (Live Patch 15 for SLE 15 SP2) to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Module for Live Patching: 15-SP2

kernel-livepatch-SLE15-SP2_Update_15-debugsource: before 2-2.1

kernel-livepatch-5_3_18-24_53_4-default-debuginfo: before 2-2.1

kernel-livepatch-5_3_18-24_53_4-default: before 2-2.1

CPE2.3

External links

https://www.suse.com/support/update/announcement/2021/suse-su-20212577-1/

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.

12) Use-after-free

EUVDB-ID: #VU54454

Risk: Low

CVSSv4.0: 4.4 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-33034

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 net/bluetooth/hci_event.c when destroying an hci_chan. A local user can escalate privileges on the system.

Mitigation

Update the affected package the Linux Kernel (Live Patch 15 for SLE 15 SP2) to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Module for Live Patching: 15-SP2

kernel-livepatch-SLE15-SP2_Update_15-debugsource: before 2-2.1

kernel-livepatch-5_3_18-24_53_4-default-debuginfo: before 2-2.1

kernel-livepatch-5_3_18-24_53_4-default: before 2-2.1

CPE2.3

External links

https://www.suse.com/support/update/announcement/2021/suse-su-20212577-1/

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.

13) Integer overflow

EUVDB-ID: #VU55143

Risk: Low

CVSSv4.0: 7.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Clear]

CVE-ID: CVE-2021-33909

CWE-ID: CWE-190 - Integer overflow

Exploit availability: Yes

Description

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

The vulnerability exists due to integer overflow during size_t-to-int conversion when creating, mounting, and deleting a deep directory structure whose total path length exceeds 1GB. An unprivileged local user can write up to 10-byte string to an offset of exactly -2GB-10B below the beginning of a vmalloc()ated kernel buffer.

Successful exploitation of vulnerability may allow an attacker to exploit the our-of-bounds write vulnerability to execute arbitrary code with root privileges.

Mitigation

Update the affected package the Linux Kernel (Live Patch 15 for SLE 15 SP2) to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Module for Live Patching: 15-SP2

kernel-livepatch-SLE15-SP2_Update_15-debugsource: before 2-2.1

kernel-livepatch-5_3_18-24_53_4-default-debuginfo: before 2-2.1

kernel-livepatch-5_3_18-24_53_4-default: before 2-2.1

CPE2.3

External links

https://www.suse.com/support/update/announcement/2021/suse-su-20212577-1/

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. However, proof of concept for this vulnerability is available.

14) Out-of-bounds read

EUVDB-ID: #VU90368

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-3444

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a local user to execute arbitrary code.

The vulnerability exists due to an out-of-bounds read error within the fixup_bpf_calls() function in kernel/bpf/verifier.c. A local user can execute arbitrary code.

Mitigation

Update the affected package the Linux Kernel (Live Patch 15 for SLE 15 SP2) to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Module for Live Patching: 15-SP2

kernel-livepatch-SLE15-SP2_Update_15-debugsource: before 2-2.1

kernel-livepatch-5_3_18-24_53_4-default-debuginfo: before 2-2.1

kernel-livepatch-5_3_18-24_53_4-default: before 2-2.1

CPE2.3

External links

https://www.suse.com/support/update/announcement/2021/suse-su-20212577-1/

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.

15) Excessive Iteration

EUVDB-ID: #VU58207

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-28950

CWE-ID: CWE-834 - Excessive Iteration

Exploit availability: No

Description

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

The vulnerability exists due to excessive iteration in fs/fuse/fuse_i.h in the Linux kernel. A local user can run a specially crafted program to perform a denial of service attack.

Mitigation

Update the affected package the Linux Kernel (Live Patch 15 for SLE 15 SP2) to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Module for Live Patching: 15-SP2

kernel-livepatch-SLE15-SP2_Update_15-debugsource: before 2-2.1

kernel-livepatch-5_3_18-24_53_4-default-debuginfo: before 2-2.1

kernel-livepatch-5_3_18-24_53_4-default: before 2-2.1

CPE2.3

External links

https://www.suse.com/support/update/announcement/2021/suse-su-20212577-1/

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.

Risk	Low
Patch available	YES
Number of vulnerabilities	15
CVE-ID	CVE-2020-36322 CVE-2020-36385 CVE-2021-22555 CVE-2021-23133 CVE-2021-27363 CVE-2021-27364 CVE-2021-27365 CVE-2021-28660 CVE-2021-28688 CVE-2021-29154 CVE-2021-32399 CVE-2021-33034 CVE-2021-33909 CVE-2021-3444 CVE-2021-28950
CWE-ID	CWE-404 CWE-416 CWE-787 CWE-362 CWE-200 CWE-264 CWE-119 CWE-665 CWE-77 CWE-190 CWE-125 CWE-834
Exploitation vector	Local
Public exploit	Vulnerability #3 is being exploited in the wild. Public exploit code for vulnerability #13 is available.
Vulnerable software	SUSE Linux Enterprise Module for Live Patching Operating systems & Components / Operating system kernel-livepatch-SLE15-SP2_Update_15-debugsource Operating systems & Components / Operating system package or component kernel-livepatch-5_3_18-24_53_4-default-debuginfo Operating systems & Components / Operating system package or component kernel-livepatch-5_3_18-24_53_4-default Operating systems & Components / Operating system package or component
Vendor	SUSE