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FreeBSD : botan2 -- Side channel during ECC key generation (d8e7e854-17fa-11e9-bef6-6805ca2fa271)

medium Nessus Plugin ID 121407

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Synopsis

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

Description

botan2 developers reports :

A timing side channel during ECC key generation could leak information about the high bits of the secret scalar. Such information allows an attacker to perform a brute-force attack on the key somewhat more efficiently than they would otherwise. Found by Jan Jancar using ECTester.

Bug introduced in 1.11.20, fixed in 2.9.0

Solution

Update the affected package.

See Also

https://botan.randombit.net/security.html#id1

http://www.nessus.org/u?05018625

Plugin Details

Severity: Medium

ID: 121407

File Name: freebsd_pkg_d8e7e85417fa11e9bef66805ca2fa271.nasl

Version: 1.3

Type: local

Published: 1/28/2019

Updated: 2/20/2020

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.2

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

CVSS v3

Risk Factor: Medium

Base Score: 5.9

Temporal Score: 5.2

Vector: CVSS:3.0/AV:N/AC:H/PR:N/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:botan2, 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: 1/27/2019

Vulnerability Publication Date: 12/17/2018

Reference Information

CVE: CVE-2018-20187