Improper input validation in BIOS firmware for some Intel(R) Processors may allow an authenticated user to potentially enable escalation of privilege via local access.

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**2020.2 IPU – BIOS Advisory**

Intel ID:

INTEL-SA-00358

Advisory Category:

Firmware

Impact of vulnerability:

Escalation of Privilege, Denial of Service

Severity rating:

HIGH

Original release:

11/10/2020

Last revised:

11/10/2020

**Summary: **

Potential security vulnerabilities in the BIOS firmware for some Intel® Processors may allow escalation of privilege or denial of service.  Intel is releasing firmware updates to mitigate this potential vulnerability.

**Vulnerability Details:**

CVEID:  CVE-2020-0590

Description: Improper input validation in BIOS firmware for some Intel(R) Processors may allow an authenticated user to potentially enable escalation of privilege via local access.

CVSS Base Score: 7.7 High

CVSS Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:L/I:H/A:H

CVEID:  CVE-2020-0587

Description: Improper conditions check in BIOS firmware for some Intel(R) Processors may allow a privileged user to potentially enable escalation of privilege via local access.

CVSS Base Score: 6.7 Medium

CVSS Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:L/I:H/A:L

CVEID:  CVE-2020-0591

Description: Improper buffer restrictions in BIOS firmware for some Intel(R) Processors may allow a privileged user to potentially enable escalation of privilege via local access.

CVSS Base Score: 6.7 Medium

CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

CVEID:  CVE-2020-0593

Description: Improper buffer restrictions in BIOS firmware for some Intel(R) Processors may allow a privileged user to potentially enable escalation of privilege via local access.

CVSS Base Score: 4.7 Medium

CVSS Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:L

CVEID:  CVE-2020-0588

Description: Improper conditions check in BIOS firmware for some Intel(R) Processors may allow a privileged user to potentially enable escalation of privilege via local access.

CVSS Base Score: 3.8 Low

CVSS Vector: CVSS:3.1/AV:P/AC:H/PR:H/UI:R/S:U/C:N/I:H/A:N

CVEID:  CVE-2020-0592

Description: Out of bounds write in BIOS firmware for some Intel(R) Processors may allow an authenticated user to potentially enable escalation of privilege and/or denial of service via local access.

CVSS Base Score: 3.0 Low

CVSS Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:L

**Affected Products:**

2nd Generation Intel® Xeon® Scalable and Intel® Xeon® Scalable Processors

*   CVE-2020-0590
*   CVE-2020-0591
*   CVE-2020-0592
*   CVE-2020-0593
*   CVE-2020-0587
*   CVE-2020-0588

Intel® Xeon® Processor D Family,  Intel® Xeon® Processor E5 v4 Family and Intel® Xeon® Processor E5 v3 Family              

*   CVE-2020-0591
*   CVE-2020-0592

10th Generation Intel® Core™ processors, 9th Generation Intel® Core™ processors, 8th Generation Intel® Core™ processors, 7th Generation Intel® Core™ processors, 6th Generation Intel® Core™ processors and

Intel® Core™ Processors with Intel® Hybrid Technology  

*   CVE-2020-0593

Intel® Xeon® Processor E7 v4 Family and Intel® Xeon® Processor E7 v2 Family      

*   CVE-2020-0592

Intel® Core™ X-series Processors and Intel® Xeon® Processor W Family   

*   CVE-2020-0587
*   CVE-2020-0591
*   CVE-2020-0592
*   CVE-2020-0593

Intel® Xeon® Processor D Family, Intel® Xeon® W Processor and Intel® Core™ X-series Processors

*   CVE-2020-0591
*   CVE-2020-0592
*   CVE-2020-0593

**Recommendations:  
**

Intel recommends that users of the affected products update to the latest BIOS firmware provided by the system manufacturer that addresses these issues.

**Acknowledgements:**

These issues were found internally by Intel employees.  Intel would like to thank, Nagaraju N Kodalapura and Hareesh Khattri for CVE-2020-0590, Jorge E Gonzalez Diaz for CVE-2020-0588, Nicholas Armour for CVE-2020-0587, and Brent Holtsclaw for CVE-2020-0591 and CVE-2020-0591.

Intel, and nearly the entire technology industry, follows a disclosure practice called Coordinated Disclosure, under which a cybersecurity vulnerability is generally publicly disclosed only after mitigations are available.

**Revision History**

Revision

Date

Description

1.0

11/10/2020

Initial Release

1.1

03/15/2021

Updated affected products for CVE-2020-0591/0592

**Legal Notices and Disclaimers**

Intel provides these materials as-is, with no express or implied warranties.

All products, dates, and figures specified are preliminary based on current expectations, and are subject to change without notice.

Intel products and services described may contain design defects or errors known as errata, which may cause the product to deviate from published specifications. Current characterized errata are available on request.

Intel products that have met their End of Servicing Updates may no longer receive functional and security updates. For additional details on support and servicing, please see this help article. 

Intel technologies’ features and benefits depend on system configuration and may require enabled hardware, software or service activation. Performance varies depending on system configuration. No product or component can be absolutely secure. Check with your system manufacturer or retailer or learn more at http://intel.com.

Some results have been estimated or simulated using internal Intel analysis or architecture simulation or modeling, and provided to you for informational purposes. Any differences in your system hardware, software or configuration may affect your actual performance.

Intel and the Intel logo are trademarks of Intel Corporation or its subsidiaries in the United States and other countries.

\*Other names and brands may be claimed as the property of others.  

Copyright © Intel Corporation 2022

**Report a Vulnerability**

If you have information about a security issue or vulnerability with an **Intel branded product or technology**, please send an e-mail to secure@intel.com. Encrypt sensitive information using our PGP public key.

Please provide as much information as possible, including:

*   The products and versions affected
*   Detailed description of the vulnerability
*   Information on known exploits

A member of the Intel Product Security Team will review your e-mail and contact you to collaborate on resolving the issue. For more information on how Intel works to resolve security issues, see:

*   Vulnerability handling guidelines

For issues related to Intel's external web presence (Intel.com and related subdomains), please contact Intel's External Security Research team.

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CVE-2020-0590: INTEL-SA-00358

Improper conditions check in Intel BIOS platform sample code for some Intel(R) Processors before may allow a privileged user to potentially enable escalation of privilege via local access.

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**Intel BIOS Platform Sample Code Advisory**

**Summary: **

Potential security vulnerabilities in Intel BIOS platform sample code for some Intel® Processors may allow escalation of privilege.  Intel is releasing BIOS platform sample code updates to mitigate these potential vulnerabilities.

**Vulnerability Details:**

CVEID: CVE-2020-8764

Description: Improper access control in BIOS firmware for some Intel(R) Processors may allow a privileged user to potentially enable escalation of privilege via local access.

CVSS Base Score: 8.2 High

CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

CVEID: CVE-2020-8738

Description: Improper conditions check in Intel BIOS platform sample code for some Intel(R) Processors before may allow a privileged user to potentially enable escalation of privilege via local access.

CVSS Base Score: 7.5 High

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

CVEID: CVE-2020-8740

Description: Out of bounds write in Intel BIOS platform sample code for some Intel(R) Processors may allow a privileged user to potentially enable escalation of privilege via local access.

CVSS Base Score: 6.7 Medium

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

CVEID: CVE-2020-8739

Description: Use of potentially dangerous function in Intel BIOS platform sample code for some Intel(R) Processors may allow an authenticated user to potentially enable escalation of privilege via local access.

CVSS Base Score: 4.6 Medium

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

**Affected Products:**

2nd Generation Intel® Xeon® Scalable Processors, Intel® Core™ X-series Processors, Intel® Xeon® Processor W Family and Intel® Xeon® Scalable Processors     

*   CVE-2020-8738
*   CVE-2020-8739
*   CVE-2020-8740
*   CVE-2020-8764

Intel® Xeon® Processor D Family, Intel® Xeon® Processor E7 v4 Family and Intel® Xeon® Processor E5 v3 Family, Intel® Xeon® Processor E5 v4 Family

*   CVE-2020-8738
*   CVE-2020-8740
*   CVE-2020-8764

Intel® Xeon® Processor D Family               

*   CVE-2020-8739
*   CVE-2020-8740
*   CVE-2020-8764

Intel® Xeon® Processor E7 v3 Family

*   CVE2020-8764

Intel® Atom® Processor C3XXX

*   CVE-2020-8738

Intel recommends that users of the affected products update to the latest BIOS firmware provided by the system manufacturer that addresses these issues.  

**Acknowledgements:**

Intel would like to thank Dmitry Frolov (CVE-2020-8738) for reporting this issue.

The following issues were found internally by Intel, CVE-2020-8739 and CVE-2020-8764.  Intel would like to thank Brent Holtsclaw for CVE-2020-8740.

Intel, and nearly the entire technology industry, follows a disclosure practice called Coordinated Disclosure, under which a cybersecurity vulnerability is generally publicly disclosed only after mitigations are available.

**Revision History**

Revision

Date

Description

1.0

11/10/2020

Initial Release

**Legal Notices and Disclaimers**

Intel provides these materials as-is, with no express or implied warranties.

All products, dates, and figures specified are preliminary based on current expectations, and are subject to change without notice.

Intel, processors, chipsets, and desktop boards may contain design defects or errors known as errata, which may cause the product to deviate from published specifications. Current characterized errata are available on request.

Intel technologies’ features and benefits depend on system configuration and may require enabled hardware, software or service activation. Performance varies depending on system configuration. No product or component can be absolutely secure. Check with your system manufacturer or retailer or learn more at https://intel.com.

Some results have been estimated or simulated using internal Intel analysis or architecture simulation or modeling, and provided to you for informational purposes. Any differences in your system hardware, software or configuration may affect your actual performance.

Intel and the Intel logo are trademarks of Intel Corporation in the United States and other countries.

\*Other names and brands may be claimed as the property of others.  
Copyright © Intel Corporation 2022

**Report a Vulnerability**

If you have information about a security issue or vulnerability with an **Intel branded product or technology**, please send an e-mail to secure@intel.com. Encrypt sensitive information using our PGP public key.

Please provide as much information as possible, including:

*   The products and versions affected
*   Detailed description of the vulnerability
*   Information on known exploits

A member of the Intel Product Security Team will review your e-mail and contact you to collaborate on resolving the issue. For more information on how Intel works to resolve security issues, see:

*   Vulnerability handling guidelines

For issues related to Intel's external web presence (Intel.com and related subdomains), please contact Intel's External Security Research team.

**Need product support?**

If you...

*   Have questions about the security features of an Intel product
*   Require technical support
*   Want product updates or patches

  
Please visit Support & Downloads.

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CVE-2020-8738: INTEL-SA-00390

Improper buffer restrictions in BIOS firmware for some Intel(R) Processors may allow a privileged user to potentially enable escalation of privilege via local access.

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**2020.2 IPU – BIOS Advisory**

Intel ID:

INTEL-SA-00358

Advisory Category:

Firmware

Impact of vulnerability:

Escalation of Privilege, Denial of Service

Severity rating:

HIGH

Original release:

11/10/2020

Last revised:

11/10/2020

**Summary: **

Potential security vulnerabilities in the BIOS firmware for some Intel® Processors may allow escalation of privilege or denial of service.  Intel is releasing firmware updates to mitigate this potential vulnerability.

**Vulnerability Details:**

CVEID:  CVE-2020-0590

Description: Improper input validation in BIOS firmware for some Intel(R) Processors may allow an authenticated user to potentially enable escalation of privilege via local access.

CVSS Base Score: 7.7 High

CVSS Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:L/I:H/A:H

CVEID:  CVE-2020-0587

Description: Improper conditions check in BIOS firmware for some Intel(R) Processors may allow a privileged user to potentially enable escalation of privilege via local access.

CVSS Base Score: 6.7 Medium

CVSS Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:L/I:H/A:L

CVEID:  CVE-2020-0591

Description: Improper buffer restrictions in BIOS firmware for some Intel(R) Processors may allow a privileged user to potentially enable escalation of privilege via local access.

CVSS Base Score: 6.7 Medium

CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

CVEID:  CVE-2020-0593

Description: Improper buffer restrictions in BIOS firmware for some Intel(R) Processors may allow a privileged user to potentially enable escalation of privilege via local access.

CVSS Base Score: 4.7 Medium

CVSS Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:L

CVEID:  CVE-2020-0588

Description: Improper conditions check in BIOS firmware for some Intel(R) Processors may allow a privileged user to potentially enable escalation of privilege via local access.

CVSS Base Score: 3.8 Low

CVSS Vector: CVSS:3.1/AV:P/AC:H/PR:H/UI:R/S:U/C:N/I:H/A:N

CVEID:  CVE-2020-0592

Description: Out of bounds write in BIOS firmware for some Intel(R) Processors may allow an authenticated user to potentially enable escalation of privilege and/or denial of service via local access.

CVSS Base Score: 3.0 Low

CVSS Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:L

**Affected Products:**

2nd Generation Intel® Xeon® Scalable and Intel® Xeon® Scalable Processors

*   CVE-2020-0590
*   CVE-2020-0591
*   CVE-2020-0592
*   CVE-2020-0593
*   CVE-2020-0587
*   CVE-2020-0588

Intel® Xeon® Processor D Family,  Intel® Xeon® Processor E5 v4 Family and Intel® Xeon® Processor E5 v3 Family              

*   CVE-2020-0591
*   CVE-2020-0592

10th Generation Intel® Core™ processors, 9th Generation Intel® Core™ processors, 8th Generation Intel® Core™ processors, 7th Generation Intel® Core™ processors, 6th Generation Intel® Core™ processors and

Intel® Core™ Processors with Intel® Hybrid Technology  

*   CVE-2020-0593

Intel® Xeon® Processor E7 v4 Family and Intel® Xeon® Processor E7 v2 Family      

*   CVE-2020-0592

Intel® Core™ X-series Processors and Intel® Xeon® Processor W Family   

*   CVE-2020-0587
*   CVE-2020-0591
*   CVE-2020-0592
*   CVE-2020-0593

Intel® Xeon® Processor D Family, Intel® Xeon® W Processor and Intel® Core™ X-series Processors

*   CVE-2020-0591
*   CVE-2020-0592
*   CVE-2020-0593

**Recommendations:  
**

Intel recommends that users of the affected products update to the latest BIOS firmware provided by the system manufacturer that addresses these issues.

**Acknowledgements:**

These issues were found internally by Intel employees.  Intel would like to thank, Nagaraju N Kodalapura and Hareesh Khattri for CVE-2020-0590, Jorge E Gonzalez Diaz for CVE-2020-0588, Nicholas Armour for CVE-2020-0587, and Brent Holtsclaw for CVE-2020-0591 and CVE-2020-0591.

Intel, and nearly the entire technology industry, follows a disclosure practice called Coordinated Disclosure, under which a cybersecurity vulnerability is generally publicly disclosed only after mitigations are available.

**Revision History**

Revision

Date

Description

1.0

11/10/2020

Initial Release

1.1

03/15/2021

Updated affected products for CVE-2020-0591/0592

**Legal Notices and Disclaimers**

Intel provides these materials as-is, with no express or implied warranties.

All products, dates, and figures specified are preliminary based on current expectations, and are subject to change without notice.

Intel, processors, chipsets, and desktop boards may contain design defects or errors known as errata, which may cause the product to deviate from published specifications. Current characterized errata are available on request.

Intel technologies’ features and benefits depend on system configuration and may require enabled hardware, software or service activation. Performance varies depending on system configuration. No product or component can be absolutely secure. Check with your system manufacturer or retailer or learn more at https://intel.com.

Some results have been estimated or simulated using internal Intel analysis or architecture simulation or modeling, and provided to you for informational purposes. Any differences in your system hardware, software or configuration may affect your actual performance.

Intel and the Intel logo are trademarks of Intel Corporation in the United States and other countries.

\*Other names and brands may be claimed as the property of others.  
Copyright © Intel Corporation 2022

**Report a Vulnerability**

If you have information about a security issue or vulnerability with an **Intel branded product or technology**, please send an e-mail to secure@intel.com. Encrypt sensitive information using our PGP public key.

Please provide as much information as possible, including:

*   The products and versions affected
*   Detailed description of the vulnerability
*   Information on known exploits

A member of the Intel Product Security Team will review your e-mail and contact you to collaborate on resolving the issue. For more information on how Intel works to resolve security issues, see:

*   Vulnerability handling guidelines

For issues related to Intel's external web presence (Intel.com and related subdomains), please contact Intel's External Security Research team.

**Need product support?**

If you...

*   Have questions about the security features of an Intel product
*   Require technical support
*   Want product updates or patches

  
Please visit Support & Downloads.

*   Report a Vulnerability
*   Product Support

CVE-2020-0591: INTEL-SA-00358

Dell XPS 13 9370 BIOS versions prior to 1.13.1 contains an Improper Exception Handling vulnerability. A local attacker with physical access could exploit this vulnerability to prevent the system from booting until the exploited boot device is removed.

CVE-2020-5387

A flaw null pointer dereference in the Linux kernel cgroupv2 subsystem in versions before 5.7.10 was found in the way when reboot the system. A local user could use this flaw to crash the system or escalate their privileges on the system.

CVE-2020-14356: kernel NULL pointer dereference in __cgroup_bpf_run_filter_skb

In the Linux kernel before 5.7.8, fs/nfsd/vfs.c (in the NFS server) can set incorrect permissions on new filesystem objects when the filesystem lacks ACL support, aka CID-22cf8419f131. This occurs because the current umask is not considered.

CVE-2020-24394: #962254 - NFSv4.2: umask not applied on filesystem without ACL support

An issue was discovered in the Video Extension in Suprema BioStar 2 before 2.8.2. Remote attackers can read arbitrary files from the server via Directory Traversal.

BioStar 2 Package

BioStar 2 is a web-based, open, and integrated security platform. Suprema provides materials to make BioStar 2 easy to use. Get the latest software, manuals, firmware and so on.

**BioStar 2.9.0**

BioStar 2 Release Information

*   Version: V2.9.0
*   Release Date: Oct 05, 2022

*   Revision Note
    
    Revision Note V2.9.0 \[EN\]
    
    790.10 KB
    
*   Installation Package
    
    BioStar 2.9.0 Setup(x64)
    
    1.48 GB
    
*   Installation Package
    
    BioStar 2.9.0 Setup(x86)
    
    1.32 GB
    
*   BioStar 2 Manual
    
    BioStar 2 Quick Guide V1.01 \[EN\]
    
    3.19 MB
    
*   BioStar 2 Manual
    
    BioStar 2 Installation Guide V2.9.0 \[EN\]
    
    1.38 MB
    
*   BioStar 2 Manual
    
    BioStar 2 Administrator Guide V2.9.0 \[EN\]
    
    12.78 MB
    
*   Language Pack
    
    Language Pack for BioStar 2.8.0
    
    934.44 KB
    
*   Device Firmware
    
    Latest Firmware Package
    
    1.35 GB

CVE-2020-15050: Suprema | Security & Biometrics

A flaw was found in the AD DC NBT server in all Samba versions before 4.10.17, before 4.11.11 and before 4.12.4. A samba user could send an empty UDP packet to cause the samba server to crash.

Description Huzaifa S. Sidhpurwala 2020-06-26 04:44:42 UTC

As per upstream advisory:

The NetBIOS over TCP/IP name resolution protocol is implemented as a UDP datagram on port 137.

The AD DC client and server-side processing code for NBT name resolution will enter a tight loop if a UDP packet with 0 data length is received.  The client for this case is only found in the AD DC side of the codebase, not that used by the the member server or file server.

Comment 1 Huzaifa S. Sidhpurwala 2020-06-26 04:44:46 UTC

Acknowledgments:

Name: the Samba project
Upstream: Martin von Wittich (IServ GmbH), Wilko Meyer (IServ GmbH)

Comment 2 Huzaifa S. Sidhpurwala 2020-06-26 04:46:01 UTC

Mitigation:

The NetBIOS over TCP/IP name resolution protocol is implemented as a UDP datagram on port 137.

The AD DC client and server-side processing code for NBT name resolution will enter a tight loop if a UDP packet with 0 data length is received.  The client for this case is only found in the AD DC side of the codebase, not that used by the the member server or file server.

Comment 4 Huzaifa S. Sidhpurwala 2020-07-02 09:37:12 UTC

Created samba tracking bugs for this issue:

Affects: fedora-all \[bug 1853259\]

Comment 6 Hardik Vyas 2020-07-02 11:52:38 UTC

Statement:

This flaw does not affect the version of samba shipped with Red Hat Enterprise Linux and Red Hat Gluster Storage 3 because there is no support for samba as Active Directory Domain Controller.

CVE-2020-14303: Empty UDP packet DoS in Samba AD DC nbtd

The fix for CVE-2019-11599 was not complete. A local user could use this flaw to obtain sensitive information, cause a denial of service, or possibly have other unspecified impacts by triggering a race condition with mmget_not_zero or get_task_mm calls.

CVE-2019-14898

An array overflow was discovered in mt76_add_fragment in drivers/net/wireless/mediatek/mt76/dma.c in the Linux kernel before 5.5.10, aka CID-b102f0c522cf. An oversized packet with too many rx fragments can corrupt memory of adjacent pages.

Tag

#bios