SUSE SLES12 / SLES15 Security Update : kernel (Live Patch 18 for SLE 12 SP4) (SUSE-SU-2021:2584-1)

high Nessus Plugin ID 152188

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-2021:2584-1 advisory.

- An issue was discovered in the Linux kernel before 5.10. 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. (CVE-2020-36385)

- A heap out-of-bounds write affecting Linux since v2.6.19-rc1 was discovered in net/netfilter/x_tables.c.
This allows an attacker to gain privileges or cause a DoS (via heap memory corruption) through user name space (CVE-2021-22555)

- fs/seq_file.c in the Linux kernel 3.16 through 5.13.x before 5.13.4 does not properly restrict seq buffer allocations, leading to an integer overflow, an Out-of-bounds Write, and escalation to root by an unprivileged user, aka CID-8cae8cd89f05. (CVE-2021-33909)

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_72-default and / or kgraft-patch-4_12_14-95_68-default packages.

See Also

https://bugzilla.suse.com/1187052

https://bugzilla.suse.com/1188117

https://bugzilla.suse.com/1188257

http://www.nessus.org/u?ae58c676

https://www.suse.com/security/cve/CVE-2020-36385

https://www.suse.com/security/cve/CVE-2021-22555

https://www.suse.com/security/cve/CVE-2021-33909

Plugin Details

Severity: High

ID: 152188

File Name: suse_SU-2021-2584-1.nasl

Version: 1.4

Type: local

Agent: unix

Published: 8/3/2021

Updated: 1/20/2022

Supported Sensors: Nessus Agent

Risk Information

CVSS Score Source: CVE-2021-33909

VPR

Risk Factor: Critical

Score: 9.7

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 6.3

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

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

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 7.5

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

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

Vulnerability Information

CPE: p-cpe:/a:novell:suse_linux:kernel-livepatch-4_12_14-197_72-default, p-cpe:/a:novell:suse_linux:kgraft-patch-4_12_14-95_68-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 Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 8/2/2021

Vulnerability Publication Date: 4/20/2021

Exploitable With

Metasploit (Netfilter x_tables Heap OOB Write Privilege Escalation)

Reference Information

CVE: CVE-2020-36385, CVE-2021-22555, CVE-2021-33909

SuSE: SUSE-SU-2021:2584-1

IAVA: 2021-A-0350