SUSE SLES12 / SLES15 Security Update : kernel (Live Patch 18 for SLE 12 SP5) (SUSE-SU-2021:2020-1)

high Nessus Plugin ID 150882

Synopsis

The remote SUSE host is missing one or more security updates.

Description

The remote SUSE Linux SLES12 / SLES15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2021:2020-1 advisory.

- Use After Free vulnerability in nfc sockets in the Linux Kernel before 5.12.4 allows local attackers to elevate their privileges. In typical configurations, the issue can only be triggered by a privileged local user with the CAP_NET_RAW capability. (CVE-2021-23134)

- net/bluetooth/hci_request.c in the Linux kernel through 5.12.2 has a race condition for removal of the HCI controller. (CVE-2021-32399)

- In the Linux kernel before 5.12.4, net/bluetooth/hci_event.c has a use-after-free when destroying an hci_chan, aka CID-5c4c8c954409. This leads to writing an arbitrary value. (CVE-2021-33034)

- kernel/bpf/verifier.c in the Linux kernel through 5.12.7 enforces incorrect limits for pointer arithmetic operations, aka CID-bb01a1bba579. This can be abused to perform out-of-bounds reads and writes in kernel memory, leading to local privilege escalation to root. In particular, there is a corner case where the off reg causes a masking direction change, which then results in an incorrect final aux->alu_limit.
(CVE-2021-33200)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the affected kernel-livepatch-4_12_14-197_89-default, kgraft-patch-4_12_14-122_71-default and / or kgraft- patch-4_12_14-95_74-default packages.

See Also

https://bugzilla.suse.com/1185847

https://bugzilla.suse.com/1185899

https://bugzilla.suse.com/1186061

https://bugzilla.suse.com/1186285

https://bugzilla.suse.com/1186498

http://www.nessus.org/u?636c2c91

https://www.suse.com/security/cve/CVE-2021-23134

https://www.suse.com/security/cve/CVE-2021-32399

https://www.suse.com/security/cve/CVE-2021-33034

https://www.suse.com/security/cve/CVE-2021-33200

Plugin Details

Severity: High

ID: 150882

File Name: suse_SU-2021-2020-1.nasl

Version: 1.3

Type: local

Agent: unix

Published: 6/21/2021

Updated: 8/9/2021

Supported Sensors: Nessus Agent

Risk Information

CVSS Score Source: CVE-2021-33200

VPR

Risk Factor: Critical

Score: 9

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 5.3

Vector: AV:L/AC:L/Au:N/C:C/I:C/A:C

Temporal Vector: E:U/RL:OF/RC:C

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:novell:suse_linux:kernel-livepatch-4_12_14-197_89-default, p-cpe:/a:novell:suse_linux:kgraft-patch-4_12_14-122_71-default, p-cpe:/a:novell:suse_linux:kgraft-patch-4_12_14-95_74-default, cpe:/o:novell:suse_linux:12, cpe:/o:novell:suse_linux:15

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/SuSE/release, Host/SuSE/rpm-list

Exploit Ease: No known exploits are available

Patch Publication Date: 6/18/2021

Vulnerability Publication Date: 5/10/2021

Reference Information

CVE: CVE-2021-23134, CVE-2021-32399, CVE-2021-33034, CVE-2021-33200

SuSE: SUSE-SU-2021:2020-1