Debian DLA-2826-1 : mbedtls - LTS security update

high Nessus Plugin ID 155683

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Synopsis

The remote Debian host is missing one or more security-related updates.

Description

The remote Debian 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-2826 advisory.

- ARM mbed TLS before 2.1.11, before 2.7.2, and before 2.8.0 has a buffer over-read in ssl_parse_server_key_exchange() that could cause a crash on invalid input. (CVE-2018-9988)

- ARM mbed TLS before 2.1.11, before 2.7.2, and before 2.8.0 has a buffer over-read in ssl_parse_server_psk_hint() that could cause a crash on invalid input. (CVE-2018-9989)

- An issue was discovered in Mbed TLS before 2.25.0 (and before 2.16.9 LTS and before 2.7.18 LTS). The calculations performed by mbedtls_mpi_exp_mod are not limited; thus, supplying overly large parameters could lead to denial of service when generating Diffie-Hellman key pairs. (CVE-2020-36475)

- An issue was discovered in Mbed TLS before 2.24.0 (and before 2.16.8 LTS and before 2.7.17 LTS). There is missing zeroization of plaintext buffers in mbedtls_ssl_read to erase unused application data from memory.
(CVE-2020-36476)

- An issue was discovered in Mbed TLS before 2.25.0 (and before 2.16.9 LTS and before 2.7.18 LTS). A NULL algorithm parameters entry looks identical to an array of REAL (size zero) and thus the certificate is considered valid. However, if the parameters do not match in any way, then the certificate should be considered invalid. (CVE-2020-36478)

- In Trusted Firmware Mbed TLS 2.24.0, a side-channel vulnerability in base64 PEM file decoding allows system-level (administrator) attackers to obtain information about secret RSA keys via a controlled- channel and side-channel attack on software running in isolated environments that can be single stepped, especially Intel SGX. (CVE-2021-24119)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Upgrade the mbedtls packages.

For Debian 9 stretch, these problems have been fixed in version 2.4.2-1+deb9u4.

Plugin Details

Severity: High

ID: 155683

File Name: debian_DLA-2826.nasl

Version: 1.3

Type: local

Agent: unix

Family: Debian Local Security Checks

Published: 11/23/2021

Updated: 11/22/2023

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.9

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

CVSS Score Source: CVE-2020-36478

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.7

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

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

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:libmbedx509-0, cpe:/o:debian:debian_linux:9.0, p-cpe:/a:debian:debian_linux:libmbedtls10, p-cpe:/a:debian:debian_linux:libmbedtls-dev, p-cpe:/a:debian:debian_linux:libmbedcrypto0

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 11/23/2021

Vulnerability Publication Date: 4/10/2018

Reference Information

CVE: CVE-2018-9988, CVE-2018-9989, CVE-2020-36475, CVE-2020-36476, CVE-2020-36478, CVE-2021-24119

Detections

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