High severity · published Apr 30, 2021
CVE-2021-21539
Dell EMC iDRAC9 versions prior to 4.40.00.00 contain a Time-of-check Time-of-use (TOCTOU) race condition vulnerability
7.1
CVSS
0.6%
EPSS
No
On KEV
Description
Dell EMC iDRAC9 versions prior to 4.40.00.00 contain a Time-of-check Time-of-use (TOCTOU) race condition vulnerability. A remote authenticated attacker could potentially exploit this vulnerability to gain elevated privileges when a user with higher privileges is simultaneously accessing iDRAC through the web interface.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
High
Privileges
Low
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 49% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
ID
Integrated Dell Remote Access Controller (iDRAC) · Dell
before 4.40.00.00 · source: vendor
IF
Idrac9 Firmware · Dell
before 4.40.00.00 · source: NVD
Affected product
ID
Integrated Dell Remote Access Controller (iDRAC)
Dell
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-21539
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-21539
Vendor Advisory
https://www.dell.com/support/kbdoc/000185293
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