Medium severity · published Jan 10, 2023
CVE-2021-26407
A randomly generated Initialization Vector (IV) may lead to a collision of IVs with the same key potentially resulting in information disclosure
5.5
CVSS
0.2%
EPSS
No
On KEV
Description
A randomly generated Initialization Vector (IV) may lead to a collision of IVs with the same key potentially resulting in information disclosure.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 9% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
2G
2nd Gen EPYC · AMD
various · source: vendor
RF
Romepi Firmware · Amd
before 1.0.0.a · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-26407
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-26407
Vendor Advisory
https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-1032
More from 2nd Gen EPYC
8.8
CVE-2021-39298
A potential vulnerability in AMD System Management Mode (SMM) interrupt handler may allow an attacker with high privileges to access the SMM resulting in arbitrary code execution…
7.8
CVE-2021-26398
Insufficient input validation in SYS_KEY_DERIVE system call in a compromised user application or ABL may allow an attacker to corrupt ASP (AMD Secure Processor) OS memory which…
7.8
CVE-2021-26316
Failure to validate the communication buffer and communication service in the BIOS may allow an attacker to tamper with the buffer resulting in potential SMM (System Management…
7.5
CVE-2023-20531
Insufficient bound checks in the SMU may allow an attacker to update the SRAM from/to address space to an invalid value potentially resulting in a denial of service
7.5
CVE-2023-20529
Insufficient bound checks in the SMU may allow an attacker to update the from/to address space to an invalid value potentially resulting in a denial of service