CVE-2021-43323
Last modified
CVE-2021-43323 is a high-severity vulnerability rated 8.2/10 on the CVSS scale. An issue was discovered in UsbCoreDxe in Insyde InsydeH2O with kernel 5.5 before 05.51.45, 5.4 before 05.43.45, 5.3 before 05.35.45, 5.2 before 05.26.45, 5.1 before 05.16.45, and 5.0 before 05.08.45. An SMM callout vulnerability allows an attacker to hijack execution flow of code running in System Management Mode. EPSS estimates a 0.35% chance of exploitation in the next 30 days.
Description
An issue was discovered in UsbCoreDxe in Insyde InsydeH2O with kernel 5.5 before 05.51.45, 5.4 before 05.43.45, 5.3 before 05.35.45, 5.2 before 05.26.45, 5.1 before 05.16.45, and 5.0 before 05.08.45. An SMM callout vulnerability allows an attacker to hijack execution flow of code running in System Management Mode. Exploiting this issue could lead to escalating privileges to SMM.
Metrics
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Insyde | Insydeh2o | >= 5.1, < 5.16.45 |
| Insyde | Insydeh2o | >= 5.2, < 5.26.45 |
| Insyde | Insydeh2o | >= 5.3, < 5.33.45 |
| Insyde | Insydeh2o | >= 5.0, < 5.08.45 |
| Insyde | Insydeh2o | >= 5.4, < 5.43.45 |
| Insyde | Insydeh2o | >= 5.5, < 5.51.45 |
References
- https://cert-portal.siemens.com/productcert/pdf/ssa-306654.pdfThird Party Advisory
- https://security.netapp.com/advisory/ntap-20220217-0013/Third Party Advisory
- https://www.insyde.com/security-pledgeVendor Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-306654.pdfThird Party Advisory
- https://security.netapp.com/advisory/ntap-20220217-0013/Third Party Advisory
- https://www.insyde.com/security-pledgeVendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
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- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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