SUSE SLES12 Security Update : kernel (SUSE-SU-2021:1891-1)

high Nessus Plugin ID 150396
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Synopsis

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

Description

The remote SUSE Linux SLES12 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2021:1891-1 advisory.

- The 802.11 standard that underpins Wi-Fi Protected Access (WPA, WPA2, and WPA3) and Wired Equivalent Privacy (WEP) doesn't require that received fragments be cleared from memory after (re)connecting to a network. Under the right circumstances, when another device sends fragmented frames encrypted using WEP, CCMP, or GCMP, this can be abused to inject arbitrary network packets and/or exfiltrate user data.
(CVE-2020-24586)

- The 802.11 standard that underpins Wi-Fi Protected Access (WPA, WPA2, and WPA3) and Wired Equivalent Privacy (WEP) doesn't require that all fragments of a frame are encrypted under the same key. An adversary can abuse this to decrypt selected fragments when another device sends fragmented frames and the WEP, CCMP, or GCMP encryption key is periodically renewed. (CVE-2020-24587)

- An issue was discovered in the kernel in NetBSD 7.1. An Access Point (AP) forwards EAPOL frames to other clients even though the sender has not yet successfully authenticated to the AP. This might be abused in projected Wi-Fi networks to launch denial-of-service attacks against connected clients and makes it easier to exploit other vulnerabilities in connected clients. (CVE-2020-26139)

- An issue was discovered in the ALFA Windows 10 driver 6.1316.1209 for AWUS036H. The Wi-Fi implementation does not verify the Message Integrity Check (authenticity) of fragmented TKIP frames. An adversary can abuse this to inject and possibly decrypt packets in WPA or WPA2 networks that support the TKIP data- confidentiality protocol. (CVE-2020-26141)

- An issue was discovered on Samsung Galaxy S3 i9305 4.4.4 devices. The WEP, WPA, WPA2, and WPA3 implementations accept second (or subsequent) broadcast fragments even when sent in plaintext and process them as full unfragmented frames. An adversary can abuse this to inject arbitrary network packets independent of the network configuration. (CVE-2020-26145)

- An issue was discovered in the Linux kernel 5.8.9. The WEP, WPA, WPA2, and WPA3 implementations reassemble fragments even though some of them were sent in plaintext. This vulnerability can be abused to inject packets and/or exfiltrate selected fragments when another device sends fragmented frames and the WEP, CCMP, or GCMP data-confidentiality protocol is used. (CVE-2020-26147)

- A race condition in Linux kernel SCTP sockets (net/sctp/socket.c) before 5.12-rc8 can lead to kernel privilege escalation from the context of a network service or an unprivileged process. If sctp_destroy_sock is called without sock_net(sk)->sctp.addr_wq_lock then an element is removed from the auto_asconf_splist list without any proper locking. This can be exploited by an attacker with network service privileges to escalate to root or from the context of an unprivileged user directly if a BPF_CGROUP_INET_SOCK_CREATE is attached which denies creation of some SCTP socket. (CVE-2021-23133)

- 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)

- The io_uring subsystem in the Linux kernel allowed the MAX_RW_COUNT limit to be bypassed in the PROVIDE_BUFFERS operation, which led to negative values being usedin mem_rw when reading /proc//mem.
This could be used to create a heap overflow leading to arbitrary code execution in the kernel. It was addressed via commit d1f82808877b (io_uring: truncate lengths larger than MAX_RW_COUNT on provide buffers) (v5.13-rc1) and backported to the stable kernels in v5.12.4, v5.11.21, and v5.10.37. It was introduced in ddf0322db79c (io_uring: add IORING_OP_PROVIDE_BUFFERS) (v5.7-rc1). (CVE-2021-3491)

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 packages.

See Also

https://bugzilla.suse.com/1176081

https://bugzilla.suse.com/1180846

https://bugzilla.suse.com/1183947

https://bugzilla.suse.com/1184611

https://bugzilla.suse.com/1184675

https://bugzilla.suse.com/1185642

https://bugzilla.suse.com/1185677

https://bugzilla.suse.com/1185680

https://bugzilla.suse.com/1185724

https://bugzilla.suse.com/1185859

https://bugzilla.suse.com/1185860

https://bugzilla.suse.com/1185862

https://bugzilla.suse.com/1185863

https://bugzilla.suse.com/1185898

https://bugzilla.suse.com/1185899

https://bugzilla.suse.com/1185901

https://bugzilla.suse.com/1185938

https://bugzilla.suse.com/1185950

https://bugzilla.suse.com/1185987

https://bugzilla.suse.com/1186060

https://bugzilla.suse.com/1186061

https://bugzilla.suse.com/1186062

https://bugzilla.suse.com/1186111

https://bugzilla.suse.com/1186285

https://bugzilla.suse.com/1186390

https://bugzilla.suse.com/1186484

https://bugzilla.suse.com/1186498

http://www.nessus.org/u?59b0ae69

https://www.suse.com/security/cve/CVE-2020-24586

https://www.suse.com/security/cve/CVE-2020-24587

https://www.suse.com/security/cve/CVE-2020-26139

https://www.suse.com/security/cve/CVE-2020-26141

https://www.suse.com/security/cve/CVE-2020-26145

https://www.suse.com/security/cve/CVE-2020-26147

https://www.suse.com/security/cve/CVE-2021-23133

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

https://www.suse.com/security/cve/CVE-2021-3491

Plugin Details

Severity: High

ID: 150396

File Name: suse_SU-2021-1891-1.nasl

Version: 1.2

Type: local

Agent: unix

Published: 6/9/2021

Updated: 8/9/2021

Dependencies: ssh_get_info.nasl, linux_alt_patch_detect.nasl

Risk Information

CVSS Score Source: CVE-2021-3491

VPR

Risk Factor: High

Score: 7.3

CVSS v2

Risk Factor: High

Base Score: 7.2

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

CVSS v3

Risk Factor: High

Base Score: 7.8

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

Vulnerability Information

CPE: p-cpe:/a:novell:suse_linux:cluster-md-kmp-default, p-cpe:/a:novell:suse_linux:dlm-kmp-default, p-cpe:/a:novell:suse_linux:gfs2-kmp-default, p-cpe:/a:novell:suse_linux:kernel-default, p-cpe:/a:novell:suse_linux:kernel-default-base, p-cpe:/a:novell:suse_linux:kernel-default-devel, p-cpe:/a:novell:suse_linux:kernel-default-kgraft, p-cpe:/a:novell:suse_linux:kernel-default-kgraft-devel, p-cpe:/a:novell:suse_linux:kernel-default-man, p-cpe:/a:novell:suse_linux:kernel-devel, p-cpe:/a:novell:suse_linux:kernel-macros, p-cpe:/a:novell:suse_linux:kernel-source, p-cpe:/a:novell:suse_linux:kernel-syms, p-cpe:/a:novell:suse_linux:kgraft-patch-4_12_14-95_77-default, p-cpe:/a:novell:suse_linux:ocfs2-kmp-default, cpe:/o:novell:suse_linux:12

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: 6/8/2021

Vulnerability Publication Date: 4/22/2021

Reference Information

CVE: CVE-2020-24586, CVE-2020-24587, CVE-2020-26139, CVE-2020-26141, CVE-2020-26145, CVE-2020-26147, CVE-2021-3491, CVE-2021-23133, CVE-2021-23134, CVE-2021-32399, CVE-2021-33034, CVE-2021-33200

SuSE: SUSE-SU-2021:1891-1