Information disclosure in TianoCore EDK II

1) Inadequate Encryption Strength

EUVDB-ID: #VU54482

Risk: Low

CVSSv4.0: 0.4 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-28213

CWE-ID: CWE-326 - Inadequate Encryption Strength

Exploit availability: No

Description

The vulnerability allows an attacker to gain access to sensitive information.

The vulnerability exists due to presence of an encrypted example private key in the IpSecDxe.efi. An attacker can decrypt the private key and gain unauthorized access to the system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

edk2: edk2-stable201808 - UDK2018

CPE2.3

• cpe:2.3:h:tianocore:edk2:edk2-stable201808:*:*:*:*:*:*:*
• cpe:2.3:h:tianocore:edk2:edk2-stable201811:*:*:*:*:*:*:*
• cpe:2.3:h:tianocore:edk2:edk2-stable201903:*:*:*:*:*:*:*

External links

https://bugzilla.tianocore.org/show_bug.cgi?id=1866

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.