SUSE update for the Linux Kernel (Live Patch 22 for SLE 15)

Published: 2021-05-25

Risk	Low
Patch available	YES
Number of vulnerabilities	4
CVE-ID	CVE-2020-0433 CVE-2020-36322 CVE-2021-28950 CVE-2021-29154
CWE-ID	CWE-416 CWE-404 CWE-834 CWE-77
Exploitation vector	Local
Public exploit	N/A
Vulnerable software	SUSE Linux Enterprise Module for Live Patching Operating systems & Components / Operating system kernel-livepatch-4_12_14-150_69-default-debuginfo Operating systems & Components / Operating system package or component kernel-livepatch-4_12_14-150_69-default Operating systems & Components / Operating system package or component kernel-livepatch-4_12_14-150_66-default-debuginfo Operating systems & Components / Operating system package or component kernel-livepatch-4_12_14-150_66-default Operating systems & Components / Operating system package or component kernel-livepatch-4_12_14-150_63-default-debuginfo Operating systems & Components / Operating system package or component kernel-livepatch-4_12_14-150_63-default Operating systems & Components / Operating system package or component kernel-livepatch-4_12_14-150_58-default-debuginfo Operating systems & Components / Operating system package or component kernel-livepatch-4_12_14-150_58-default Operating systems & Components / Operating system package or component kernel-livepatch-4_12_14-150_55-default-debuginfo Operating systems & Components / Operating system package or component kernel-livepatch-4_12_14-150_55-default Operating systems & Components / Operating system package or component kernel-livepatch-4_12_14-150_52-default-debuginfo Operating systems & Components / Operating system package or component kernel-livepatch-4_12_14-150_52-default Operating systems & Components / Operating system package or component
Vendor	SUSE

Security Bulletin

This security bulletin contains information about 4 vulnerabilities.

1) Use-after-free

EUVDB-ID: #VU47103

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-2020-0433

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a local authenticated user to execute arbitrary code.

In blk_mq_queue_tag_busy_iter of blk-mq-tag.c, there is a possible use after free due to improper locking. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-151939299

Mitigation

Update the affected package the Linux Kernel (Live Patch 22 for SLE 15) to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Module for Live Patching: 15

kernel-livepatch-4_12_14-150_69-default-debuginfo: before 4-2.2

kernel-livepatch-4_12_14-150_69-default: before 4-2.2

kernel-livepatch-4_12_14-150_66-default-debuginfo: before 5-2.2

kernel-livepatch-4_12_14-150_66-default: before 5-2.2

kernel-livepatch-4_12_14-150_63-default-debuginfo: before 7-2.2

kernel-livepatch-4_12_14-150_63-default: before 7-2.2

kernel-livepatch-4_12_14-150_58-default-debuginfo: before 9-2.2

kernel-livepatch-4_12_14-150_58-default: before 9-2.2

kernel-livepatch-4_12_14-150_55-default-debuginfo: before 10-2.2

kernel-livepatch-4_12_14-150_55-default: before 10-2.2

kernel-livepatch-4_12_14-150_52-default-debuginfo: before 10-2.2

kernel-livepatch-4_12_14-150_52-default: before 10-2.2

CPE2.3

External links

https://www.suse.com/support/update/announcement/2021/suse-su-20211728-1/

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) 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 22 for SLE 15) to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Module for Live Patching: 15

kernel-livepatch-4_12_14-150_69-default-debuginfo: before 4-2.2

kernel-livepatch-4_12_14-150_69-default: before 4-2.2

kernel-livepatch-4_12_14-150_66-default-debuginfo: before 5-2.2

kernel-livepatch-4_12_14-150_66-default: before 5-2.2

kernel-livepatch-4_12_14-150_63-default-debuginfo: before 7-2.2

kernel-livepatch-4_12_14-150_63-default: before 7-2.2

kernel-livepatch-4_12_14-150_58-default-debuginfo: before 9-2.2

kernel-livepatch-4_12_14-150_58-default: before 9-2.2

kernel-livepatch-4_12_14-150_55-default-debuginfo: before 10-2.2

kernel-livepatch-4_12_14-150_55-default: before 10-2.2

kernel-livepatch-4_12_14-150_52-default-debuginfo: before 10-2.2

kernel-livepatch-4_12_14-150_52-default: before 10-2.2

CPE2.3

External links

https://www.suse.com/support/update/announcement/2021/suse-su-20211728-1/

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) 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 22 for SLE 15) to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Module for Live Patching: 15

kernel-livepatch-4_12_14-150_69-default-debuginfo: before 4-2.2

kernel-livepatch-4_12_14-150_69-default: before 4-2.2

kernel-livepatch-4_12_14-150_66-default-debuginfo: before 5-2.2

kernel-livepatch-4_12_14-150_66-default: before 5-2.2

kernel-livepatch-4_12_14-150_63-default-debuginfo: before 7-2.2

kernel-livepatch-4_12_14-150_63-default: before 7-2.2

kernel-livepatch-4_12_14-150_58-default-debuginfo: before 9-2.2

kernel-livepatch-4_12_14-150_58-default: before 9-2.2

kernel-livepatch-4_12_14-150_55-default-debuginfo: before 10-2.2

kernel-livepatch-4_12_14-150_55-default: before 10-2.2

kernel-livepatch-4_12_14-150_52-default-debuginfo: before 10-2.2

kernel-livepatch-4_12_14-150_52-default: before 10-2.2

CPE2.3

External links

https://www.suse.com/support/update/announcement/2021/suse-su-20211728-1/

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.

4) 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 22 for SLE 15) to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Module for Live Patching: 15

kernel-livepatch-4_12_14-150_69-default-debuginfo: before 4-2.2

kernel-livepatch-4_12_14-150_69-default: before 4-2.2

kernel-livepatch-4_12_14-150_66-default-debuginfo: before 5-2.2

kernel-livepatch-4_12_14-150_66-default: before 5-2.2

kernel-livepatch-4_12_14-150_63-default-debuginfo: before 7-2.2

kernel-livepatch-4_12_14-150_63-default: before 7-2.2

kernel-livepatch-4_12_14-150_58-default-debuginfo: before 9-2.2

kernel-livepatch-4_12_14-150_58-default: before 9-2.2

kernel-livepatch-4_12_14-150_55-default-debuginfo: before 10-2.2

kernel-livepatch-4_12_14-150_55-default: before 10-2.2

kernel-livepatch-4_12_14-150_52-default-debuginfo: before 10-2.2

kernel-livepatch-4_12_14-150_52-default: before 10-2.2

CPE2.3

External links

https://www.suse.com/support/update/announcement/2021/suse-su-20211728-1/

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.