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FreeBSD : Mbed TLS -- Side channel attack on ECDSA (bf1f47c4-7f1b-11ea-bf94-001cc0382b2f)

medium Nessus Plugin ID 135604

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Synopsis

The remote FreeBSD host is missing a security-related update.

Description

Manuel Pegourie-Gonnard reports :

An attacker with access to precise enough timing and memory access information (typically an untrusted operating system attacking a secure enclave such as SGX or the TrustZone secure world) can fully recover an ECDSA private key after observing a number of signature operations.

Solution

Update the affected package.

See Also

http://www.nessus.org/u?b66af52d

http://www.nessus.org/u?9f2ee221

Plugin Details

Severity: Medium

ID: 135604

File Name: freebsd_pkg_bf1f47c47f1b11eabf94001cc0382b2f.nasl

Version: 1.4

Type: local

Published: 4/16/2020

Updated: 3/6/2023

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Low

Base Score: 1.9

Temporal Score: 1.4

Vector: CVSS2#AV:L/AC:M/Au:N/C:P/I:N/A:N

CVSS Score Source: CVE-2020-10932

CVSS v3

Risk Factor: Medium

Base Score: 4.7

Temporal Score: 4.1

Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:freebsd:freebsd:mbedtls, cpe:/o:freebsd:freebsd

Required KB Items: Host/local_checks_enabled, Host/FreeBSD/release, Host/FreeBSD/pkg_info

Exploit Ease: No known exploits are available

Patch Publication Date: 4/15/2020

Vulnerability Publication Date: 4/14/2020

Reference Information

CVE: CVE-2020-10932