SUSE update for the Linux Kernel



Risk Medium
Patch available YES
Number of vulnerabilities 4
CVE-ID CVE-2021-0941
CVE-2021-20322
CVE-2021-31916
CVE-2021-34981
CWE-ID CWE-125
CWE-330
CWE-787
CWE-415
Exploitation vector Network
Public exploit N/A
Vulnerable software
SUSE Linux Enterprise High Availability
Operating systems & Components / Operating system

SUSE Linux Enterprise Live Patching
Operating systems & Components / Operating system

SUSE Linux Enterprise Workstation Extension
Operating systems & Components / Operating system

SUSE Linux Enterprise Software Development Kit
Operating systems & Components / Operating system

SUSE Linux Enterprise Server
Operating systems & Components / Operating system

ocfs2-kmp-default-debuginfo
Operating systems & Components / Operating system package or component

ocfs2-kmp-default
Operating systems & Components / Operating system package or component

gfs2-kmp-default-debuginfo
Operating systems & Components / Operating system package or component

gfs2-kmp-default
Operating systems & Components / Operating system package or component

dlm-kmp-default-debuginfo
Operating systems & Components / Operating system package or component

dlm-kmp-default
Operating systems & Components / Operating system package or component

cluster-md-kmp-default-debuginfo
Operating systems & Components / Operating system package or component

cluster-md-kmp-default
Operating systems & Components / Operating system package or component

kgraft-patch-4_12_14-122_103-default
Operating systems & Components / Operating system package or component

kernel-default-kgraft-devel
Operating systems & Components / Operating system package or component

kernel-default-kgraft
Operating systems & Components / Operating system package or component

kernel-default-man
Operating systems & Components / Operating system package or component

kernel-default-devel-debuginfo
Operating systems & Components / Operating system package or component

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-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

kernel-docs
Operating systems & Components / Operating system package or component

kernel-obs-build-debugsource
Operating systems & Components / Operating system package or component

kernel-obs-build
Operating systems & Components / Operating system package or component

kernel-default-extra-debuginfo
Operating systems & Components / Operating system package or component

kernel-default-extra
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

Vendor SUSE

Security Bulletin

This security bulletin contains information about 4 vulnerabilities.

1) Out-of-bounds read

EUVDB-ID: #VU64702

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-2021-0941

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

Exploit availability: No

Description

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

The vulnerability exists in __bpf_skb_max_len() function in net/core/filter.c in the Linux kernel. A local user with special privilege can gain access to out-of-bounds memory leading to a system crash or a leak of internal kernel information.

Mitigation

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

Vulnerable software versions

SUSE Linux Enterprise High Availability: 12-SP5

SUSE Linux Enterprise Live Patching: 12-SP5

SUSE Linux Enterprise Workstation Extension: 12-SP5

SUSE Linux Enterprise Software Development Kit: 12-SP5

SUSE Linux Enterprise Server: 12-SP5

ocfs2-kmp-default-debuginfo: before 4.12.14-122.103.1

ocfs2-kmp-default: before 4.12.14-122.103.1

gfs2-kmp-default-debuginfo: before 4.12.14-122.103.1

gfs2-kmp-default: before 4.12.14-122.103.1

dlm-kmp-default-debuginfo: before 4.12.14-122.103.1

dlm-kmp-default: before 4.12.14-122.103.1

cluster-md-kmp-default-debuginfo: before 4.12.14-122.103.1

cluster-md-kmp-default: before 4.12.14-122.103.1

kgraft-patch-4_12_14-122_103-default: before 1-8.5.1

kernel-default-kgraft-devel: before 4.12.14-122.103.1

kernel-default-kgraft: before 4.12.14-122.103.1

kernel-default-man: before 4.12.14-122.103.1

kernel-default-devel-debuginfo: before 4.12.14-122.103.1

kernel-source: before 4.12.14-122.103.1

kernel-macros: before 4.12.14-122.103.1

kernel-devel: before 4.12.14-122.103.1

kernel-syms: before 4.12.14-122.103.1

kernel-default-devel: before 4.12.14-122.103.1

kernel-default-base-debuginfo: before 4.12.14-122.103.1

kernel-default-base: before 4.12.14-122.103.1

kernel-default: before 4.12.14-122.103.1

kernel-docs: before 4.12.14-122.103.1

kernel-obs-build-debugsource: before 4.12.14-122.103.1

kernel-obs-build: before 4.12.14-122.103.1

kernel-default-extra-debuginfo: before 4.12.14-122.103.1

kernel-default-extra: before 4.12.14-122.103.1

kernel-default-debugsource: before 4.12.14-122.103.1

kernel-default-debuginfo: before 4.12.14-122.103.1

CPE2.3 External links

https://www.suse.com/support/update/announcement/2021/suse-su-20213877-1/


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 of insufficiently random values

EUVDB-ID: #VU63839

Risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-20322

CWE-ID: CWE-330 - Use of Insufficiently Random Values

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to sensitive information.

The vulnerability exists due to an error when processing received ICMP errors. A remote attacker can effectively bypass the source port UDP randomization to gain access to sensitive information.

Mitigation

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

Vulnerable software versions

SUSE Linux Enterprise High Availability: 12-SP5

SUSE Linux Enterprise Live Patching: 12-SP5

SUSE Linux Enterprise Workstation Extension: 12-SP5

SUSE Linux Enterprise Software Development Kit: 12-SP5

SUSE Linux Enterprise Server: 12-SP5

ocfs2-kmp-default-debuginfo: before 4.12.14-122.103.1

ocfs2-kmp-default: before 4.12.14-122.103.1

gfs2-kmp-default-debuginfo: before 4.12.14-122.103.1

gfs2-kmp-default: before 4.12.14-122.103.1

dlm-kmp-default-debuginfo: before 4.12.14-122.103.1

dlm-kmp-default: before 4.12.14-122.103.1

cluster-md-kmp-default-debuginfo: before 4.12.14-122.103.1

cluster-md-kmp-default: before 4.12.14-122.103.1

kgraft-patch-4_12_14-122_103-default: before 1-8.5.1

kernel-default-kgraft-devel: before 4.12.14-122.103.1

kernel-default-kgraft: before 4.12.14-122.103.1

kernel-default-man: before 4.12.14-122.103.1

kernel-default-devel-debuginfo: before 4.12.14-122.103.1

kernel-source: before 4.12.14-122.103.1

kernel-macros: before 4.12.14-122.103.1

kernel-devel: before 4.12.14-122.103.1

kernel-syms: before 4.12.14-122.103.1

kernel-default-devel: before 4.12.14-122.103.1

kernel-default-base-debuginfo: before 4.12.14-122.103.1

kernel-default-base: before 4.12.14-122.103.1

kernel-default: before 4.12.14-122.103.1

kernel-docs: before 4.12.14-122.103.1

kernel-obs-build-debugsource: before 4.12.14-122.103.1

kernel-obs-build: before 4.12.14-122.103.1

kernel-default-extra-debuginfo: before 4.12.14-122.103.1

kernel-default-extra: before 4.12.14-122.103.1

kernel-default-debugsource: before 4.12.14-122.103.1

kernel-default-debuginfo: before 4.12.14-122.103.1

CPE2.3 External links

https://www.suse.com/support/update/announcement/2021/suse-su-20213877-1/


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

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: #VU63574

Risk: Low

CVSSv4.0: 5.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-31916

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

Exploit availability: No

Description

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

The vulnerability exists due to a boundary error in list_devices in drivers/md/dm-ioctl.c in the Multi-device driver module. A special user (CAP_SYS_ADMIN) can trigger a buffer overflow in the ioctl for listing devices and escalate privileges on the system.

Mitigation

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

Vulnerable software versions

SUSE Linux Enterprise High Availability: 12-SP5

SUSE Linux Enterprise Live Patching: 12-SP5

SUSE Linux Enterprise Workstation Extension: 12-SP5

SUSE Linux Enterprise Software Development Kit: 12-SP5

SUSE Linux Enterprise Server: 12-SP5

ocfs2-kmp-default-debuginfo: before 4.12.14-122.103.1

ocfs2-kmp-default: before 4.12.14-122.103.1

gfs2-kmp-default-debuginfo: before 4.12.14-122.103.1

gfs2-kmp-default: before 4.12.14-122.103.1

dlm-kmp-default-debuginfo: before 4.12.14-122.103.1

dlm-kmp-default: before 4.12.14-122.103.1

cluster-md-kmp-default-debuginfo: before 4.12.14-122.103.1

cluster-md-kmp-default: before 4.12.14-122.103.1

kgraft-patch-4_12_14-122_103-default: before 1-8.5.1

kernel-default-kgraft-devel: before 4.12.14-122.103.1

kernel-default-kgraft: before 4.12.14-122.103.1

kernel-default-man: before 4.12.14-122.103.1

kernel-default-devel-debuginfo: before 4.12.14-122.103.1

kernel-source: before 4.12.14-122.103.1

kernel-macros: before 4.12.14-122.103.1

kernel-devel: before 4.12.14-122.103.1

kernel-syms: before 4.12.14-122.103.1

kernel-default-devel: before 4.12.14-122.103.1

kernel-default-base-debuginfo: before 4.12.14-122.103.1

kernel-default-base: before 4.12.14-122.103.1

kernel-default: before 4.12.14-122.103.1

kernel-docs: before 4.12.14-122.103.1

kernel-obs-build-debugsource: before 4.12.14-122.103.1

kernel-obs-build: before 4.12.14-122.103.1

kernel-default-extra-debuginfo: before 4.12.14-122.103.1

kernel-default-extra: before 4.12.14-122.103.1

kernel-default-debugsource: before 4.12.14-122.103.1

kernel-default-debuginfo: before 4.12.14-122.103.1

CPE2.3 External links

https://www.suse.com/support/update/announcement/2021/suse-su-20213877-1/


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) Double Free

EUVDB-ID: #VU77325

Risk: Low

CVSSv4.0: 4 [CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-34981

CWE-ID: CWE-415 - Double Free

Exploit availability: No

Description

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

The vulnerability exists due to a boundary error within the CMTP module in Linux kernel. A local user can trigger a double 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 High Availability: 12-SP5

SUSE Linux Enterprise Live Patching: 12-SP5

SUSE Linux Enterprise Workstation Extension: 12-SP5

SUSE Linux Enterprise Software Development Kit: 12-SP5

SUSE Linux Enterprise Server: 12-SP5

ocfs2-kmp-default-debuginfo: before 4.12.14-122.103.1

ocfs2-kmp-default: before 4.12.14-122.103.1

gfs2-kmp-default-debuginfo: before 4.12.14-122.103.1

gfs2-kmp-default: before 4.12.14-122.103.1

dlm-kmp-default-debuginfo: before 4.12.14-122.103.1

dlm-kmp-default: before 4.12.14-122.103.1

cluster-md-kmp-default-debuginfo: before 4.12.14-122.103.1

cluster-md-kmp-default: before 4.12.14-122.103.1

kgraft-patch-4_12_14-122_103-default: before 1-8.5.1

kernel-default-kgraft-devel: before 4.12.14-122.103.1

kernel-default-kgraft: before 4.12.14-122.103.1

kernel-default-man: before 4.12.14-122.103.1

kernel-default-devel-debuginfo: before 4.12.14-122.103.1

kernel-source: before 4.12.14-122.103.1

kernel-macros: before 4.12.14-122.103.1

kernel-devel: before 4.12.14-122.103.1

kernel-syms: before 4.12.14-122.103.1

kernel-default-devel: before 4.12.14-122.103.1

kernel-default-base-debuginfo: before 4.12.14-122.103.1

kernel-default-base: before 4.12.14-122.103.1

kernel-default: before 4.12.14-122.103.1

kernel-docs: before 4.12.14-122.103.1

kernel-obs-build-debugsource: before 4.12.14-122.103.1

kernel-obs-build: before 4.12.14-122.103.1

kernel-default-extra-debuginfo: before 4.12.14-122.103.1

kernel-default-extra: before 4.12.14-122.103.1

kernel-default-debugsource: before 4.12.14-122.103.1

kernel-default-debuginfo: before 4.12.14-122.103.1

CPE2.3 External links

https://www.suse.com/support/update/announcement/2021/suse-su-20213877-1/


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.



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