#VU34604 Missing Encryption of Sensitive Data in mbed Crypto - CVE-2020-10941

Vulnerability identifier: #VU34604

Vulnerability risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-10941

CWE-ID: CWE-311

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
mbed Crypto
Universal components / Libraries / Libraries used by multiple products

Vendor: ARM

Description

The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.

Arm Mbed TLS before 2.6.15 allows attackers to obtain sensitive information (an RSA private key) by measuring cache usage during an import.

Mitigation
Install update from vendor's website.

Vulnerable software versions

mbed Crypto: 3.0.0d0 - 3.0.1

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External links
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/5JPE2HFBDJF3UBT6Q4VWLKNKCVCMX25J/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WD6OSOLLAR2AVPJAMGUKWRXN6477IHHV/
https://tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-2020-02

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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