SUSE update for the Linux Kernel (Live Patch 39 for SLE 12 SP2)



Risk Medium
Patch available YES
Number of vulnerabilities 5
CVE-ID CVE-2020-0429
CVE-2020-1749
CVE-2020-25645
CVE-2020-27786
CVE-2020-28374
CWE-ID CWE-416
CWE-319
CWE-22
Exploitation vector Network
Public exploit Public exploit code for vulnerability #4 is available.
Vulnerable software
 SUSE Linux Enterprise Server
Operating systems & Components / Operating system

SUSE Linux Enterprise Server for SAP
Operating systems & Components / Operating system

kgraft-patch-4_4_121-92_149-default
Operating systems & Components / Operating system package or component

kgraft-patch-4_4_180-94_138-default-debuginfo
Operating systems & Components / Operating system package or component

kgraft-patch-4_4_180-94_138-default
Operating systems & Components / Operating system package or component

Vendor SUSE

Security Bulletin

This security bulletin contains information about 5 vulnerabilities.

1) Use-after-free

EUVDB-ID: #VU47047

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-2020-0429

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

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

In l2tp_session_delete and related functions of l2tp_core.c, there is possible memory corruption due to a use after free. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-152735806

Mitigation

Update the affected package the Linux Kernel (Live Patch 39 for SLE 12 SP2) to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Server: 12-SP2-LTSS-ERICSSON - 12-SP3-LTSS

SUSE Linux Enterprise Server for SAP: 12-SP2 - 12-SP3

kgraft-patch-4_4_121-92_149-default: before 2-2.2

kgraft-patch-4_4_180-94_138-default-debuginfo: before 2-2.2

kgraft-patch-4_4_180-94_138-default: before 2-2.2

CPE2.3 External links

https://www.suse.com/support/update/announcement/2021/suse-su-20210835-1/


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) Cleartext transmission of sensitive information

EUVDB-ID: #VU52058

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-1749

CWE-ID: CWE-319 - Cleartext Transmission of Sensitive Information

Exploit availability: No

Description

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

The vulnerability exists due to incorrect implementation of some networking protocols in IPsec, such as VXLAN and GENEVE tunnels over IPv6. When an encrypted tunnel is created between two hosts, the kernel isn't correctly routing tunneled data over the encrypted link; rather sending the data unencrypted. This would allow anyone in between the two endpoints to read the traffic unencrypted.

Mitigation

Update the affected package the Linux Kernel (Live Patch 39 for SLE 12 SP2) to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Server: 12-SP2-LTSS-ERICSSON - 12-SP3-LTSS

SUSE Linux Enterprise Server for SAP: 12-SP2 - 12-SP3

kgraft-patch-4_4_121-92_149-default: before 2-2.2

kgraft-patch-4_4_180-94_138-default-debuginfo: before 2-2.2

kgraft-patch-4_4_180-94_138-default: before 2-2.2

CPE2.3 External links

https://www.suse.com/support/update/announcement/2021/suse-su-20210835-1/


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) Cleartext transmission of sensitive information

EUVDB-ID: #VU51546

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-25645

CWE-ID: CWE-319 - Cleartext Transmission of Sensitive Information

Exploit availability: No

Description

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

The vulnerability exists due to traffic passed between two Geneve endpoints with configured IPsec can be unencrypted for the specific UDP port. A remote attacker with ability to intercept network traffic can gain access to sensitive data.

Mitigation

Update the affected package the Linux Kernel (Live Patch 39 for SLE 12 SP2) to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Server: 12-SP2-LTSS-ERICSSON - 12-SP3-LTSS

SUSE Linux Enterprise Server for SAP: 12-SP2 - 12-SP3

kgraft-patch-4_4_121-92_149-default: before 2-2.2

kgraft-patch-4_4_180-94_138-default-debuginfo: before 2-2.2

kgraft-patch-4_4_180-94_138-default: before 2-2.2

CPE2.3 External links

https://www.suse.com/support/update/announcement/2021/suse-su-20210835-1/


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.

4) Use-after-free

EUVDB-ID: #VU83583

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-2020-27786

CWE-ID: CWE-416 - Use After Free

Exploit availability: Yes

Description

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

The vulnerability exists due to a use-after-free error within the MIDI implementation in Linux kernel. A local authenticated user can trigger a use-after-free error and escalate privileges on the system.

Mitigation

Update the affected package the Linux Kernel (Live Patch 39 for SLE 12 SP2) to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Server: 12-SP2-LTSS-ERICSSON - 12-SP3-LTSS

SUSE Linux Enterprise Server for SAP: 12-SP2 - 12-SP3

kgraft-patch-4_4_121-92_149-default: before 2-2.2

kgraft-patch-4_4_180-94_138-default-debuginfo: before 2-2.2

kgraft-patch-4_4_180-94_138-default: before 2-2.2

CPE2.3 External links

https://www.suse.com/support/update/announcement/2021/suse-su-20210835-1/


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.

5) Path traversal

EUVDB-ID: #VU49914

Risk: Medium

CVSSv4.0: 6.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-28374

CWE-ID: CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Exploit availability: No

Description

The vulnerability allows a remote user to perform directory traversal attacks.

The vulnerability exists due to input validation error when processing directory traversal sequences in drivers/target/target_core_xcopy.c in the Linux kernel. A remote user with access to iSCSI LUN can send a specially crafted XCOPY request and read or write arbitrary files on the system.


Mitigation

Update the affected package the Linux Kernel (Live Patch 39 for SLE 12 SP2) to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Server: 12-SP2-LTSS-ERICSSON - 12-SP3-LTSS

SUSE Linux Enterprise Server for SAP: 12-SP2 - 12-SP3

kgraft-patch-4_4_121-92_149-default: before 2-2.2

kgraft-patch-4_4_180-94_138-default-debuginfo: before 2-2.2

kgraft-patch-4_4_180-94_138-default: before 2-2.2

CPE2.3 External links

https://www.suse.com/support/update/announcement/2021/suse-su-20210835-1/


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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



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