On May 14, 2019, Intel disclosed four new side channel vulnerabilities (CVE-2018-12126, CVE-2018-12127, CVE-2018-12130, and CVE-2019-11091), Intel unified this series of vulnerabilities into Microarchitectural Data Sampling vulnerabilities. The exploitation of these vulnerabilities requires an attacker to embed malicious code in the target device, mainly for local use. In some cases, it may also be remotely exploited through JS code and malicious websites. These attack methods can be effective in both PC and cloud environments. They can cause applications, operating system virtual machines, and trusted execution environments to disclose sensitive information, including passwords, website content, disk encryption keys, and browser history.
The affected products and corresponding update versions are shown in the table below.
| CVE | V3.1 Vector（Base） | Base Score | V3.1 Vector（Temporal） | Temporal Score |
| CVE-2018-12126 | AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N | 6.5 | E:P/RL:O/RC:C | 5.9 |
| CVE-2018-12127 | AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N | 6.5 | E:P/RL:O/RC:C | 5.9 |
| CVE-2018-12130 | AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N | 6.5 | E:P/RL:O/RC:C | 5.9 |
| CVE-2019-11091 | AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N | 3.8 | E:P/RL:O/RC:C | 3.4 |
| Product | BIOS Update Version | Release Date |
| NF5888M5 | NF5888M5_BIOS_4.0.0_standard_20190523 | 6.1 |
| TS860M5 | TS860M5_BIOS_4.0.05_standard_20190529 | 6.13 |
| NF5468M5 | NF5468M5_BIOS_4.0.3_Standard_20190604 | 7.1 |
| NF5180M5 | NF5180M5_BIOS_4.1.5_standard_20190521 | 6.18 |
| NF5280M5 | NF5280M5_BIOS_4.1.8_standard_20190521 | 6.13 |
| NF5270M5 | NF5270M5_BIOS_4.1.2_Standard_20190625 | 7.11 |
| NF5466M5 | NF5466M5_BIOS_4.1.8_standard_20190523 | 7.11 |
| NF8260M5 | NF8260M5_BIOS_4.1.8_Standard_20190611 | 7.16 |
| NS5162M5 | NS5162M5_BIOS_4.1.4_standard_20190514 | 6.19 |
| NF5266M5 | NF5266M5_BIOS_3.1.3_Standard_20190605 | 7.22 |
| SN5161M5 | SN5161M5_BIOS_4.0.03_Standard_20190607 | 7.8 |
| NF8480M5 | NF8480M5_BIOS_4.1.05_Standard_20190603 | 7.1 |
| NS5488M5 | i48_BIOS_4.1.06_Standard_20190617 | 7.22 |
| NS5484M5 | i48_BIOS_4.1.06_Standard_20190617 | 7.22 |
| NS5482M5 | i48_BIOS_4.1.06_Standard_20190617 | 7.22 |
| NX5460M5 | NX5460M5_BIOS_4.0.04_Standard_20190531 | 7.11 |
| NF5288M5 | NF5288M5_BIOS_4.1.05_Standard_20190702 | 8.28 |
| SA5212M4 | SA5212M4_BIOS_4.1.19_standard_20190607 | 7.17 |
| NF5180M4 | NF5180M4_BIOS_4.1.25_20190606 | 9.26 |
| NF5280M4 | NF5280M4_BIOS_4.1.26_Standard_20190607 | 9.14 |
| NF5170M4 | NF5170M4_BIOS_4.1.19_standard_20190607 | 8.28 |
| NF5270M4 | NF5270M4_BIOS_4.1.26_Standard_20190606 | 9.9 |
| NF5460M4 | NF5460M4_BIOS_4.1.20_standard_20190606 | 8.28 |
KAYTUS provides method to update CPU Microcode of its various products as mentioned in the table above.Download your product’s corresponding BIOS image and perform the BIOS upgrade.
Please visit the Support Center site for updates on the applicable products.
20190926-V1.3-Updated the release date
20190614-V1.2-Updated the release date
20190613-V1.1-Updated the fix version
20190611-V1.0-Initial Release
[1]Intel: https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00233.html
[2]Red Hat: https://access.redhat.com/security/vulnerabilities/mds
[3]Microsoft: https://support.microsoft.com/en-us/help/4457951/windows-guidance-to-protect-against-speculative-execution-side-channel
For issues about implementing the recommendations of this Security Bulletin, contact normal KAYTUS Services Support channel. For other issues about the content of this Security Bulletin, send e-mail to sec@kaytus.com.
To report a potential security vulnerability for KAYTUS product: Reporting a Security Vulnerability
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