SUSE SLED15 / SLES15 Security Update : python3 (SUSE-SU-2021:4104-1)

medium Nessus Plugin ID 156148

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Synopsis

The remote SUSE host is missing one or more security updates.

Description

The remote SUSE Linux SLED15 / SLES15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2021:4104-1 advisory.

- There's a flaw in Python 3's pydoc. A local or adjacent attacker who discovers or is able to convince another local or adjacent user to start a pydoc server could access the server and use it to disclose sensitive information belonging to the other user that they would not normally be able to access. The highest risk of this flaw is to data confidentiality. This flaw affects Python versions before 3.8.9, Python versions before 3.9.3 and Python versions before 3.10.0a7. (CVE-2021-3426)

- There's a flaw in urllib's AbstractBasicAuthHandler class. An attacker who controls a malicious HTTP server that an HTTP client (such as web browser) connects to, could trigger a Regular Expression Denial of Service (ReDOS) during an authentication request with a specially crafted payload that is sent by the server to the client. The greatest threat that this flaw poses is to application availability.
(CVE-2021-3733)

- A flaw was found in python. An improperly handled HTTP response in the HTTP client code of python may allow a remote attacker, who controls the HTTP server, to make the client script enter an infinite loop, consuming CPU time. The highest threat from this vulnerability is to system availability. (CVE-2021-3737)

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

Solution

Update the affected packages.

Plugin Details

Severity: Medium

ID: 156148

File Name: suse_SU-2021-4104-1.nasl

Version: 1.6

Type: local

Agent: unix

Family: SuSE Local Security Checks

Published: 12/17/2021

Updated: 7/14/2023

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Low

Base Score: 2.7

Temporal Score: 2.2

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

CVSS Score Source: CVE-2021-3426

CVSS v3

Risk Factor: Medium

Base Score: 5.7

Temporal Score: 5.3

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

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

Vulnerability Information

CPE: cpe:/o:novell:suse_linux:15, p-cpe:/a:novell:suse_linux:python3-curses, p-cpe:/a:novell:suse_linux:python3-base, p-cpe:/a:novell:suse_linux:python3-dbm, p-cpe:/a:novell:suse_linux:python3-idle, p-cpe:/a:novell:suse_linux:python3-tk, p-cpe:/a:novell:suse_linux:libpython3_6m1_0, p-cpe:/a:novell:suse_linux:python3-tools, p-cpe:/a:novell:suse_linux:python3-devel, p-cpe:/a:novell:suse_linux:python3

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 12/16/2021

Vulnerability Publication Date: 4/7/2021

Reference Information

CVE: CVE-2021-3426, CVE-2021-3733, CVE-2021-3737

IAVA: 2021-A-0263-S, 2021-A-0497-S

SuSE: SUSE-SU-2021:4104-1

Detections

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