SUSE: Security Advisory (SUSE-SU-2021:2421-1)

Published: 2021-07-22 02:21:52
CVE Author: NIST National Vulnerability Database

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

severity_vector=CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

severity_origin=NVD

severity_date=2021-07-16 11:15:00 +0000 (Fri, 16 Jul 2021)

Summary:
The remote host is missing an update for the 'Linux Kernel' Linux Distribution Package(s) announced via the SUSE-SU-2021:2421-1 advisory.

Detection Method:
Checks if a vulnerable Linux Distribution Package version is present on the target host.

Technical Details:
The SUSE Linux Enterprise 15 LTSS kernel was updated to receive various security and bugfixes. The following security bugs were fixed: CVE-2021-22555: A heap out-of-bounds write was discovered in net/netfilter/x_tables.c (bnc#1188116 ). CVE-2021-33909: Extremely large seq buffer allocations in seq_file could lead to buffer underruns and code execution (bsc#1188062). CVE-2021-3609: A use-after-free in can/bcm could have led to privilege escalation (bsc#1187215). CVE-2021-33624: In kernel/bpf/verifier.c a branch can be mispredicted (e.g., because of type confusion) and consequently an unprivileged BPF program can read arbitrary memory locations via a side-channel attack, aka CID-9183671af6db (bnc#1187554). CVE-2021-0605: In pfkey_dump of af_key.c, there is a possible out-of-bounds read due to a missing bounds check. This could lead to local information disclosure with System execution privileges needed. User interaction is not needed for exploitation (bnc#1187601). CVE-2021-0512: In __hidinput_change_resolution_multipliers of hid-input.c, there is a possible out of bounds write due to a heap buffer overflow. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation (bnc#1187595). CVE-2020-26558: Bluetooth LE and BR/EDR secure pairing in Bluetooth Core Specification 2.1 may permit a nearby man-in-the-middle attacker to identify the Passkey used during pairing (in the Passkey authentication procedure) by reflection of the public key and the authentication evidence of the initiating device, potentially permitting this attacker to complete authenticated pairing with the responding device using the correct Passkey for the pairing session. The attack methodology determines the Passkey value one bit at a time (bnc#1179610). CVE-2021-34693: net/can/bcm.c in the Linux kernel allowed local users to obtain sensitive information from kernel stack memory because parts of a data structure are uninitialized (bnc#1187452). CVE-2020-36385: An issue was discovered in the Linux kernel drivers/infiniband/core/ucma.c has a use-after-free because the ctx is reached via the ctx_list in some ucma_migrate_id situations where ucma_close is called, aka CID-f5449e74802c (bnc#1187050). CVE-2021-0129: Improper access control in BlueZ may have allowed an authenticated user to potentially enable information disclosure via adjacent access (bnc#1186463). CVE-2020-36386: An issue was discovered in the Linux kernel net/bluetooth/hci_event.c has a slab out-of-bounds read in hci_extended_inquiry_result_evt, aka CID-51c19bf3d5cf (bnc#1187038). CVE-2020-24588: The 802.11 standard that underpins Wi-Fi Protected Access (WPA, WPA2, and WPA3) and Wired Equivalent Privacy (WEP) doesn't require that the A-MSDU flag in the plaintext QoS header field is authenticated. Against devices that ... [Please see the references for more information on the vulnerabilities]

Affected Versions:
'Linux Kernel' Linux Distribution Package(s) on SUSE Linux Enterprise Server for SAP 15, SUSE Linux Enterprise Server 15, SUSE Linux Enterprise Module for Live Patching 15, SUSE Linux Enterprise High Performance Computing 15, SUSE Linux Enterprise High Availability 15.

Recommendations:
Please install the updated Linux Distribution Package(s).

Solution Type:
Vendor Patch

Detection Type:
Linux Distribution Package

NIST (National Institute of Standards and Technology) NVD (National Vulnerability Database)

https://nvd.nist.gov/vuln/detail/CVE-2020-24586
https://nvd.nist.gov/vuln/detail/CVE-2020-24587
https://nvd.nist.gov/vuln/detail/CVE-2020-24588
https://nvd.nist.gov/vuln/detail/CVE-2020-26139
https://nvd.nist.gov/vuln/detail/CVE-2020-26141
https://nvd.nist.gov/vuln/detail/CVE-2020-26145
https://nvd.nist.gov/vuln/detail/CVE-2020-26147
https://nvd.nist.gov/vuln/detail/CVE-2020-26558
https://nvd.nist.gov/vuln/detail/CVE-2020-36385
https://nvd.nist.gov/vuln/detail/CVE-2020-36386
https://nvd.nist.gov/vuln/detail/CVE-2021-0129
https://nvd.nist.gov/vuln/detail/CVE-2021-0512
https://nvd.nist.gov/vuln/detail/CVE-2021-0605
https://nvd.nist.gov/vuln/detail/CVE-2021-22555
https://nvd.nist.gov/vuln/detail/CVE-2021-23133
https://nvd.nist.gov/vuln/detail/CVE-2021-23134
https://nvd.nist.gov/vuln/detail/CVE-2021-32399
https://nvd.nist.gov/vuln/detail/CVE-2021-33034
https://nvd.nist.gov/vuln/detail/CVE-2021-33200
https://nvd.nist.gov/vuln/detail/CVE-2021-33624
https://nvd.nist.gov/vuln/detail/CVE-2021-33909
https://nvd.nist.gov/vuln/detail/CVE-2021-34693
https://nvd.nist.gov/vuln/detail/CVE-2021-3491
https://nvd.nist.gov/vuln/detail/CVE-2021-3609

References:


https://www.suse.com/support/update/announcement/2021/suse-su-20212421-1/

Severity
High
CVSS Score
7.2
Published
2021-07-22
Modified
2021-07-23
Category
SuSE Local Security Checks

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