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SUSE SLES12 Security Update : grub2 (SUSE-SU-2021:0679-1)
high Nessus Plugin ID 146973
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Synopsis
The remote SUSE host is missing one or more security updates.Description
This update for grub2 fixes the following issues :grub2 now implements the new 'SBAT' method for SHIM based secure boot revocation. (bsc#1182057)
Following security issues are fixed that can violate secure boot constraints :
CVE-2020-25632: Fixed a use-after-free in rmmod command (bsc#1176711)
CVE-2020-25647: Fixed an out-of-bound write in grub_usb_device_initialize() (bsc#1177883)
CVE-2020-27749: Fixed a stack-based buffer overflow in grub_parser_split_cmdline (bsc#1179264)
CVE-2020-27779, CVE-2020-14372: Disallow cutmem and acpi commands in secure boot mode (bsc#1179265 bsc#1175970)
CVE-2021-20225: Fixed a heap out-of-bounds write in short form option parser (bsc#1182262)
CVE-2021-20233: Fixed a heap out-of-bound write due to mis-calculation of space required for quoting (bsc#1182263)
grub2 was bumped to version 2.02, same as SUSE Linux Enterprise 12 SP3.
Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
Solution
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or 'zypper patch'.Alternatively you can run the command listed for your product :
SUSE OpenStack Cloud 7 :
zypper in -t patch SUSE-OpenStack-Cloud-7-2021-679=1
SUSE Linux Enterprise Server for SAP 12-SP2 :
zypper in -t patch SUSE-SLE-SAP-12-SP2-2021-679=1
SUSE Linux Enterprise Server 12-SP2-LTSS :
zypper in -t patch SUSE-SLE-SERVER-12-SP2-2021-679=1
SUSE Linux Enterprise Server 12-SP2-BCL :
zypper in -t patch SUSE-SLE-SERVER-12-SP2-BCL-2021-679=1
See Also
https://bugzilla.suse.com/show_bug.cgi?id=1175970
https://bugzilla.suse.com/show_bug.cgi?id=1176711
https://bugzilla.suse.com/show_bug.cgi?id=1177883
https://bugzilla.suse.com/show_bug.cgi?id=1179264
https://bugzilla.suse.com/show_bug.cgi?id=1179265
https://bugzilla.suse.com/show_bug.cgi?id=1182057
https://bugzilla.suse.com/show_bug.cgi?id=1182262
https://bugzilla.suse.com/show_bug.cgi?id=1182263
https://www.suse.com/security/cve/CVE-2020-14372/
https://www.suse.com/security/cve/CVE-2020-25632/
https://www.suse.com/security/cve/CVE-2020-25647/
https://www.suse.com/security/cve/CVE-2020-27749/
https://www.suse.com/security/cve/CVE-2020-27779/
https://www.suse.com/security/cve/CVE-2021-20225/
Plugin Details
Severity: High
ID: 146973
File Name: suse_SU-2021-0679-1.nasl
Version: 1.4
Type: local
Agent: unix
Family: SuSE Local Security Checks
Published: 3/3/2021
Updated: 1/18/2024
Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Nessus
Risk Information
VPR
Risk Factor: High
Score: 7.3
CVSS v2
Risk Factor: High
Base Score: 7.2
Temporal Score: 5.6
Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C
CVSS Score Source: CVE-2021-20233
CVSS v3
Risk Factor: High
Base Score: 8.2
Temporal Score: 7.4
Vector: CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C
Vulnerability Information
CPE: cpe:/o:novell:suse_linux:12, p-cpe:/a:novell:suse_linux:grub2-x86_64-xen, p-cpe:/a:novell:suse_linux:grub2-s390x-emu, p-cpe:/a:novell:suse_linux:grub2, p-cpe:/a:novell:suse_linux:grub2-i386-pc, p-cpe:/a:novell:suse_linux:grub2-x86_64-efi, p-cpe:/a:novell:suse_linux:grub2-debuginfo, p-cpe:/a:novell:suse_linux:grub2-debugsource
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: 3/2/2021
Vulnerability Publication Date: 3/3/2021
Reference Information
CVE: CVE-2020-14372, CVE-2020-25632, CVE-2020-25647, CVE-2020-27749, CVE-2020-27779, CVE-2021-20225, CVE-2021-20233