RHEL 8 : python-cryptography (RHSA-2021:1608)

critical Nessus Plugin ID 149686
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Synopsis

The remote Red Hat host is missing one or more security updates.

Description

The remote Redhat Enterprise Linux 8 host has a package installed that is affected by multiple vulnerabilities as referenced in the RHSA-2021:1608 advisory.

- python-cryptography: Bleichenbacher timing oracle attack against RSA decryption (CVE-2020-25659)

- python-cryptography: Large inputs for symmetric encryption can trigger integer overflow leading to buffer overflow (CVE-2020-36242)

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

Solution

Update the affected python3-cryptography package.

See Also

https://cwe.mitre.org/data/definitions/385.html

https://cwe.mitre.org/data/definitions/190.html

https://cwe.mitre.org/data/definitions/119.html

https://access.redhat.com/security/cve/CVE-2020-25659

https://access.redhat.com/security/cve/CVE-2020-36242

https://access.redhat.com/errata/RHSA-2021:1608

https://bugzilla.redhat.com/1889988

https://bugzilla.redhat.com/1926226

Plugin Details

Severity: Critical

ID: 149686

File Name: redhat-RHSA-2021-1608.nasl

Version: 1.4

Type: local

Agent: unix

Published: 5/19/2021

Updated: 10/7/2021

Dependencies: ssh_get_info.nasl, redhat_repos.nasl

Risk Information

CVSS Score Source: CVE-2020-36242

VPR

Risk Factor: Medium

Score: 5.2

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 4.7

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

Temporal Vector: CVSS2#E:U/RL:OF/RC:C

CVSS v3

Risk Factor: Critical

Base Score: 9.1

Temporal Score: 7.9

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

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

Vulnerability Information

CPE: cpe:2.3:o:redhat:enterprise_linux:8:*:*:*:*:*:*:*, cpe:2.3:o:redhat:rhel_eus:8.4:*:*:*:*:*:*:*, p-cpe:2.3:a:redhat:enterprise_linux:python3-cryptography:*:*:*:*:*:*:*, cpe:2.3:o:redhat:rhel_aus:8.4:*:*:*:*:*:*:*, cpe:2.3:o:redhat:rhel_e4s:8.4:*:*:*:*:*:*:*, cpe:2.3:o:redhat:rhel_tus:8.4:*:*:*:*:*:*:*

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu

Exploit Ease: No known exploits are available

Patch Publication Date: 5/18/2021

Vulnerability Publication Date: 1/11/2021

Reference Information

CVE: CVE-2020-25659, CVE-2020-36242

CWE: 119, 190, 385

RHSA: 2021:1608