CVE-2021-38578
First published: Thu May 13 2021(Updated: )
Existing CommBuffer checks in SmmEntryPoint will not catch underflow when computing BufferSize.
Credit: infosec@edk2.groups.io infosec@edk2.groups.io
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/edk2 | <0:20221207gitfff6d81270b5-9.el9_2 | 0:20221207gitfff6d81270b5-9.el9_2 |
| Tianocore EDK2 | <=202202 | |
| Insyde Kernel | =5.0 | |
| Insyde Kernel | =5.1 | |
| Insyde Kernel | =5.2 | |
| Insyde Kernel | =5.3 | |
| Insyde Kernel | =5.4 | |
| Insyde Kernel | =5.5 |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
- https://bugzilla.tianocore.org/show_bug.cgi?id=3387
- https://www.insyde.com/security-pledge/SA-2023024
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2096378
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2096379
- https://edk2.groups.io/g/devel/message/90516
- https://access.redhat.com/errata/RHSA-2023:2165
- https://access.redhat.com/security/cve/cve-2021-38578
- https://bugzilla.redhat.com/show_bug.cgi?id=1960321
- https://www.cve.org/CVERecord?id=CVE-2021-38578 https://nvd.nist.gov/vuln/detail/CVE-2021-38578
Frequently Asked Questions
What is CVE-2021-38578?
CVE-2021-38578 is a vulnerability in edk2 that allows a local attacker with administration privileges to execute code within the system management mode (SMM) context.
What is the severity of CVE-2021-38578?
CVE-2021-38578 has a severity score of 9.8 (Critical).
How does CVE-2021-38578 occur?
CVE-2021-38578 occurs due to an integer underflow in the SmmEntryPoint function in edk2, leading to a write into the SMM region.
Who is affected by CVE-2021-38578?
CVE-2021-38578 affects systems running edk2 with the specified versions and installations of Tianocore Edk2 and Insyde Kernel.
How can I fix CVE-2021-38578?
To fix CVE-2021-38578, update the affected software to the specified versions provided by the vendor.
- agent/author
- agent/description
- agent/event
- agent/first-publish-date
- agent/last-modified-date
- agent/references
- agent/severity
- agent/softwarecombine
- agent/tags
- agent/type
- agent/weakness
- collector/nvd-api
- collector/nvd-index
- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2021-38578
- collector/redhat-cve
- vendor/tianocore
- canonical/tianocore edk2
- version/tianocore edk2/202202
- vendor/insyde
- canonical/insyde kernel
- version/insyde kernel/5.0
- version/insyde kernel/5.1
- version/insyde kernel/5.2
- version/insyde kernel/5.3
- version/insyde kernel/5.4
- version/insyde kernel/5.5
- package-manager/redhat