SUSE SLES12 Security Update : kernel (SUSE-SU-2023:3324-1)

critical Nessus Plugin ID 179914

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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-2023:3324-1 advisory.

- In the Linux kernel before 4.20.2, kernel/sched/fair.c mishandles leaf cfs_rq's, which allows attackers to cause a denial of service (infinite loop in update_blocked_averages) or possibly have unspecified other impact by inducing a high load. (CVE-2018-20784)

- Systems with microprocessors utilizing speculative execution and speculative execution of memory reads before the addresses of all prior memory writes are known may allow unauthorized disclosure of information to an attacker with local user access via a side-channel analysis, aka Speculative Store Bypass (SSB), Variant 4. (CVE-2018-3639)

- Information exposure through microarchitectural state after transient execution in certain vector execution units for some Intel(R) Processors may allow an authenticated user to potentially enable information disclosure via local access. (CVE-2022-40982)

- Copy_from_user on 64-bit versions of the Linux kernel does not implement the __uaccess_begin_nospec allowing a user to bypass the access_ok check and pass a kernel pointer to copy_from_user(). This would allow an attacker to leak information. We recommend upgrading beyond commit 74e19ef0ff8061ef55957c3abd71614ef0f42f47 (CVE-2023-0459)

- A flaw that boot CPU could be vulnerable for the speculative execution behavior kind of attacks in the Linux kernel X86 CPU Power management options functionality was found in the way user resuming CPU from suspend-to-RAM. A local user could use this flaw to potentially get unauthorized access to some memory of the CPU similar to the speculative execution behavior kind of attacks. (CVE-2023-1637)

- A side channel vulnerability on some of the AMD CPUs may allow an attacker to influence the return address prediction. This may result in speculative execution at an attacker-controlled?address, potentially leading to information disclosure. (CVE-2023-20569)

- An issue in Zen 2 CPUs, under specific microarchitectural circumstances, may allow an attacker to potentially access sensitive information. (CVE-2023-20593)

- A use after free flaw was found in hfsplus_put_super in fs/hfsplus/super.c in the Linux Kernel. This flaw could allow a local user to cause a denial of service problem. (CVE-2023-2985)

- A NULL pointer dereference vulnerability was found in netlink_dump. This issue can occur when the Netlink socket receives the message(sendmsg) for the XFRM_MSG_GETSA, XFRM_MSG_GETPOLICY type message, and the DUMP flag is set and can cause a denial of service or possibly another unspecified impact. Due to the nature of the flaw, privilege escalation cannot be fully ruled out, although it is unlikely. (CVE-2023-3106)

- An out of bounds (OOB) memory access flaw was found in the Linux kernel in relay_file_read_start_pos in kernel/relay.c in the relayfs. This flaw could allow a local attacker to crash the system or leak kernel internal information. (CVE-2023-3268)

- Linux Kernel nftables Out-Of-Bounds Read/Write Vulnerability; nft_byteorder poorly handled vm register contents when CAP_NET_ADMIN is in any user or network namespace (CVE-2023-35001)

- A use-after-free flaw was found in vcs_read in drivers/tty/vt/vc_screen.c in vc_screen in the Linux Kernel. This flaw allows an attacker with local user access to cause a system crash or leak internal kernel information. (CVE-2023-3567)

- An out-of-bounds write vulnerability in the Linux kernel's net/sched: sch_qfq component can be exploited to achieve local privilege escalation. The qfq_change_agg() function in net/sched/sch_qfq.c allows an out- of-bounds write because lmax is updated according to packet sizes without bounds checks. We recommend upgrading past commit 3e337087c3b5805fe0b8a46ba622a962880b5d64. (CVE-2023-3611)

- A use-after-free vulnerability in the Linux kernel's net/sched: cls_fw component can be exploited to achieve local privilege escalation. If tcf_change_indev() fails, fw_set_parms() will immediately return an error after incrementing or decrementing the reference counter in tcf_bind_filter(). If an attacker can control the reference counter and set it to zero, they can cause the reference to be freed, leading to a use-after-free vulnerability. We recommend upgrading past commit 0323bce598eea038714f941ce2b22541c46d488f.
(CVE-2023-3776)

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

Solution

Update the affected packages.

See Also

https://bugzilla.suse.com/1087082

https://bugzilla.suse.com/1126703

https://bugzilla.suse.com/1206418

https://bugzilla.suse.com/1207561

https://bugzilla.suse.com/1209779

https://bugzilla.suse.com/1210584

https://bugzilla.suse.com/1211738

https://bugzilla.suse.com/1211867

https://bugzilla.suse.com/1212502

https://bugzilla.suse.com/1213059

https://bugzilla.suse.com/1213167

https://bugzilla.suse.com/1213251

https://bugzilla.suse.com/1213286

https://bugzilla.suse.com/1213287

https://bugzilla.suse.com/1213585

https://bugzilla.suse.com/1213588

https://lists.suse.com/pipermail/sle-updates/2023-August/031024.html

https://www.suse.com/security/cve/CVE-2018-20784

https://www.suse.com/security/cve/CVE-2018-3639

https://www.suse.com/security/cve/CVE-2022-40982

https://www.suse.com/security/cve/CVE-2023-0459

https://www.suse.com/security/cve/CVE-2023-1637

https://www.suse.com/security/cve/CVE-2023-20569

https://www.suse.com/security/cve/CVE-2023-20593

https://www.suse.com/security/cve/CVE-2023-2985

https://www.suse.com/security/cve/CVE-2023-3106

https://www.suse.com/security/cve/CVE-2023-3268

https://www.suse.com/security/cve/CVE-2023-35001

https://www.suse.com/security/cve/CVE-2023-3567

https://www.suse.com/security/cve/CVE-2023-3611

https://www.suse.com/security/cve/CVE-2023-3776

Plugin Details

Severity: Critical

ID: 179914

File Name: suse_SU-2023-3324-1.nasl

Version: 1.0

Type: local

Agent: unix

Published: 8/17/2023

Updated: 8/17/2023

Supported Sensors: Agentless Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Critical

Score: 9.2

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.9

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS Score Source: CVE-2018-20784

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.8

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

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:novell:suse_linux:kernel-syms, p-cpe:/a:novell:suse_linux:kernel-source, p-cpe:/a:novell:suse_linux:kernel-default-base, p-cpe:/a:novell:suse_linux:kernel-macros, p-cpe:/a:novell:suse_linux:kernel-default-devel, p-cpe:/a:novell:suse_linux:kernel-default, cpe:/o:novell:suse_linux:12, p-cpe:/a:novell:suse_linux:kernel-devel

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 8/16/2023

Vulnerability Publication Date: 5/21/2018

Reference Information

CVE: CVE-2018-20784, CVE-2018-3639, CVE-2022-40982, CVE-2023-0459, CVE-2023-1637, CVE-2023-20569, CVE-2023-20593, CVE-2023-2985, CVE-2023-3106, CVE-2023-3268, CVE-2023-35001, CVE-2023-3567, CVE-2023-3611, CVE-2023-3776

SuSE: SUSE-SU-2023:3324-1