Vulnerability · Published Jun 16, 2021 · Assigned by mitre
CVE-2020-27339
Medium 6.7
In plain English
A medium-severity security flaw in the affected software. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 25% of all known vulnerabilities).
Severity (CVSS NVD)6.7Medium
Exploit odds (30 days)0.3%top 75.3% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
In the kernel in Insyde InsydeH2O 5.x, certain SMM drivers did not correctly validate the CommBuffer and CommBufferSize parameters, allowing callers to corrupt either the firmware or the OS memory. The fixed versions for this issue in the AhciBusDxe, IdeBusDxe, NvmExpressDxe, SdHostDriverDxe, and SdMmcDeviceDxe drivers are 05.16.25, 05.26.25, 05.35.25, 05.43.25, and 05.51.25 (for Kernel 5.1 through 5.5).
Affected products (as reported)
References
- https://www.insyde.com/security-pledge/SA-2021001 x_refsource_MISC
- https://security.netapp.com/advisory/ntap-20220216-0005/ x_refsource_CONFIRM
- https://cert-portal.siemens.com/productcert/pdf/ssa-306654.pdf x_refsource_CONFIRM
- https://www.kb.cert.org/vuls/id/796611
- https://cert-portal.siemens.com/productcert/html/ssa-306654.html