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Vulnerability Details : CVE-2020-10932

An issue was discovered in Arm Mbed TLS before 2.16.6 and 2.7.x before 2.7.15. An attacker that can get precise enough side-channel measurements can recover the long-term ECDSA private key by (1) reconstructing the projective coordinate of the result of scalar multiplication by exploiting side channels in the conversion to affine coordinates; (2) using an attack described by Naccache, Smart, and Stern in 2003 to recover a few bits of the ephemeral scalar from those projective coordinates via several measurements; and (3) using a lattice attack to get from there to the long-term ECDSA private key used for the signatures. Typically an attacker would have sufficient access when attacking an SGX enclave and controlling the untrusted OS.
Publish Date : 2020-04-15 Last Update Date : 2022-05-03
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- CVSS Scores & Vulnerability Types

CVSS Score
1.9
Confidentiality Impact Partial (There is considerable informational disclosure.)
Integrity Impact None (There is no impact to the integrity of the system)
Availability Impact None (There is no impact to the availability of the system.)
Access Complexity Medium (The access conditions are somewhat specialized. Some preconditions must be satistified to exploit)
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s)
CWE ID 327

- Products Affected By CVE-2020-10932

# Product Type Vendor Product Version Update Edition Language
1 Application ARM Mbed Tls * * * * Version Details Vulnerabilities
2 OS Fedoraproject Fedora 31 * * * Version Details Vulnerabilities
3 OS Fedoraproject Fedora 32 * * * Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
ARM Mbed Tls 1
Fedoraproject Fedora 2

- References For CVE-2020-10932

https://lists.fedoraproject.org/archives/list/[email protected]/message/ZNOS2IIBH5WNJXZUV546PY7666DE7Y3L/
FEDORA FEDORA-2020-42564738a1
https://lists.fedoraproject.org/archives/list/[email protected]/message/FCWN5HIF4CJ2LZTOMEBJ7Q4IMMV7ZU2V/
FEDORA FEDORA-2020-9a6e8e63e9
https://tls.mbed.org/tech-updates/security-advisories
https://tls.mbed.org/tech-updates/releases/mbedtls-2.16.6-and-2.7.15-released CONFIRM
https://tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-2020-04 CONFIRM

- Metasploit Modules Related To CVE-2020-10932

There are not any metasploit modules related to this CVE entry (Please visit www.metasploit.com for more information)


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