Special register buffer speculative side channel attack in Red Hat Enterprise Linux 6
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 3 |
| CVE-ID | CVE-2020-0543 CVE-2020-0548 CVE-2020-0549 |
| CWE-ID | CWE-200 |
| Exploitation vector | Local |
| Public exploit | N/A |
| Vulnerable software Subscribe |
microcode_ctl (Red Hat package) Operating systems & Components / Operating system package or component Red Hat Enterprise Linux Workstation Operating systems & Components / Operating system |
| Vendor | Red Hat Inc. |
Security Bulletin
This security bulletin contains information about 3 vulnerabilities.
1) Information disclosure
EUVDB-ID: #VU28928
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-2020-0543
CWE-ID:
CWE-200 - Information exposure
Exploit availability: No
DescriptionThe vulnerability allows a local user to gain access to potentially sensitive information.
The vulnerability exists due to incomplete cleanup from specific special register read operations in some Intel(R) Processors. A local user can gain unauthorized access to sensitive information on the system.
MitigationInstall updates from vendor's website.
microcode_ctl (Red Hat package): 1.17-3.el6 - 1.17-32.el6
Red Hat Enterprise Linux Workstation: 6
CPE2.3- cpe:2.3:o:red_hat:microcode_ctl_redhat_package:1.17-32.el6:*:*:*:*:red_hat_enterprise_linux:*:
- cpe:2.3:o:red_hat:microcode_ctl_redhat_package:1.17-25.el6:*:*:*:*:red_hat_enterprise_linux:*:
- cpe:2.3:o:red_hat:microcode_ctl_redhat_package:1.17-21.el6:*:*:*:*:red_hat_enterprise_linux:*:
- cpe:2.3:o:red_hat:red_hat_enterprise_linux_workstation:6:*:*:*:*:red_hat_enterprise_linux:*:
http://access.redhat.com/errata/RHSA-2020:2433
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.
2) Information disclosure
EUVDB-ID: #VU24688
Risk: Low
CVSSv3.1: 2.2 [CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-0548
CWE-ID:
CWE-200 - Information exposure
Exploit availability: No
DescriptionThe vulnerability allows a local user to gain access to potentially sensitive information.
The vulnerability exists due to cleanup errors. A local user can gain unauthorized access to sensitive information on the system.
MitigationInstall updates from vendor's website.
microcode_ctl (Red Hat package): 1.17-3.el6 - 1.17-32.el6
Red Hat Enterprise Linux Workstation: 6
CPE2.3- cpe:2.3:o:red_hat:microcode_ctl_redhat_package:1.17-32.el6:*:*:*:*:red_hat_enterprise_linux:*:
- cpe:2.3:o:red_hat:microcode_ctl_redhat_package:1.17-25.el6:*:*:*:*:red_hat_enterprise_linux:*:
- cpe:2.3:o:red_hat:microcode_ctl_redhat_package:1.17-21.el6:*:*:*:*:red_hat_enterprise_linux:*:
- cpe:2.3:o:red_hat:red_hat_enterprise_linux_workstation:6:*:*:*:*:red_hat_enterprise_linux:*:
http://access.redhat.com/errata/RHSA-2020:2433
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.
3) Information disclosure
EUVDB-ID: #VU24689
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-2020-0549
CWE-ID:
CWE-200 - Information exposure
Exploit availability: No
DescriptionThe vulnerability allows a local user to gain access to potentially sensitive information.
The vulnerability exists due to cleanup errors in some data cache evictions. A local user can gain unauthorized access to sensitive information on the system.
MitigationInstall updates from vendor's website.
microcode_ctl (Red Hat package): 1.17-3.el6 - 1.17-32.el6
Red Hat Enterprise Linux Workstation: 6
CPE2.3- cpe:2.3:o:red_hat:microcode_ctl_redhat_package:1.17-32.el6:*:*:*:*:red_hat_enterprise_linux:*:
- cpe:2.3:o:red_hat:microcode_ctl_redhat_package:1.17-25.el6:*:*:*:*:red_hat_enterprise_linux:*:
- cpe:2.3:o:red_hat:microcode_ctl_redhat_package:1.17-21.el6:*:*:*:*:red_hat_enterprise_linux:*:
- cpe:2.3:o:red_hat:red_hat_enterprise_linux_workstation:6:*:*:*:*:red_hat_enterprise_linux:*:
http://access.redhat.com/errata/RHSA-2020:2433
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.
