Risk | Low |
Patch available | YES |
Number of vulnerabilities | 3 |
CVE-ID | CVE-2020-10766 CVE-2020-10767 CVE-2020-10768 |
CWE-ID | CWE-362 CWE-399 CWE-20 |
Exploitation vector | Local |
Public exploit | N/A |
Vulnerable software Subscribe |
Red Hat Enterprise Linux for x86_64 - Extended Update Support Operating systems & Components / Operating system Red Hat Enterprise Linux Server - AUS Operating systems & Components / Operating system Red Hat Enterprise Linux Server - TUS Operating systems & Components / Operating system Red Hat Enterprise Linux for x86_64 Operating systems & Components / Operating system kpatch-patch-4_18_0-193_6_3 (Red Hat package) Operating systems & Components / Operating system package or component kpatch-patch-4_18_0-193_1_2 (Red Hat package) Operating systems & Components / Operating system package or component kpatch-patch-4_18_0-193 (Red Hat package) Operating systems & Components / Operating system package or component |
Vendor | Red Hat Inc. |
Security Bulletin
This security bulletin contains information about 3 vulnerabilities.
EUVDB-ID: #VU47074
Risk: Low
CVSSv3.1: 5.7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-10766
Exploit availability: No
DescriptionThe vulnerability allows a local user to gain access to sensitive information.
A logic bug flaw was found in Linux kernel before 5.8-rc1 in the
implementation of SSBD. A bug in the logic handling allows an attacker
with a local account to disable SSBD protection during a context switch
when additional speculative execution mitigations are in place. This
issue was introduced when the per task/process conditional STIPB
switching was added on top of the existing SSBD switching.
Install updates from vendor's website.
Red Hat Enterprise Linux for x86_64 - Extended Update Support: 8.2
Red Hat Enterprise Linux Server - AUS: 8.2
Red Hat Enterprise Linux Server - TUS: 8.2
Red Hat Enterprise Linux for x86_64: 8.0
kpatch-patch-4_18_0-193_6_3 (Red Hat package): before 1-2.el8_2
kpatch-patch-4_18_0-193_1_2 (Red Hat package): before 1-3.el8_2
kpatch-patch-4_18_0-193 (Red Hat package): before 1-5.el8
CPE2.3http://access.redhat.com/errata/RHSA-2020:3073
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
EUVDB-ID: #VU47075
Risk: Low
CVSSv3.1: 5.7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-10767
CWE-ID:
CWE-399 - Resource Management Errors
Exploit availability: No
DescriptionThe vulnerability allows a local user to gain access to sensitive information.
A flaw was found in the Linux kernel before 5.8-rc1 in the
implementation of the Enhanced IBPB (Indirect Branch Prediction
Barrier). The IBPB mitigation will be disabled when STIBP is not
available or when the Enhanced Indirect Branch Restricted Speculation
(IBRS) is available. This flaw allows a local user to perform a Spectre
V2 style attack when this configuration is active.
Install updates from vendor's website.
Red Hat Enterprise Linux for x86_64 - Extended Update Support: 8.2
Red Hat Enterprise Linux Server - AUS: 8.2
Red Hat Enterprise Linux Server - TUS: 8.2
Red Hat Enterprise Linux for x86_64: 8.0
kpatch-patch-4_18_0-193_6_3 (Red Hat package): before 1-2.el8_2
kpatch-patch-4_18_0-193_1_2 (Red Hat package): before 1-3.el8_2
kpatch-patch-4_18_0-193 (Red Hat package): before 1-5.el8
CPE2.3http://access.redhat.com/errata/RHSA-2020:3073
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
EUVDB-ID: #VU47076
Risk: Low
CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-10768
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: No
DescriptionThe vulnerability allows a local authenticated user to gain access to sensitive information.
A flaw was found in the Linux Kernel before 5.8-rc1 in the prctl() function, where it can be used to enable indirect branch speculation after it has been disabled. This call incorrectly reports it as being 'force disabled' when it is not and opens the system to Spectre v2 attacks. The highest threat from this vulnerability is to confidentiality.
MitigationInstall updates from vendor's website.
Red Hat Enterprise Linux for x86_64 - Extended Update Support: 8.2
Red Hat Enterprise Linux Server - AUS: 8.2
Red Hat Enterprise Linux Server - TUS: 8.2
Red Hat Enterprise Linux for x86_64: 8.0
kpatch-patch-4_18_0-193_6_3 (Red Hat package): before 1-2.el8_2
kpatch-patch-4_18_0-193_1_2 (Red Hat package): before 1-3.el8_2
kpatch-patch-4_18_0-193 (Red Hat package): before 1-5.el8
CPE2.3http://access.redhat.com/errata/RHSA-2020:3073
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.