Debian dla-3432 : idle-python2.7 - security update

critical Nessus Plugin ID 176347

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Synopsis

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

Description

The remote Debian 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-3432 advisory.

- ------------------------------------------------------------------------- Debian LTS Advisory DLA-3432-1 [email protected] https://www.debian.org/lts/security/ Sylvain Beucler May 24, 2023 https://wiki.debian.org/LTS
- -------------------------------------------------------------------------

Package : python2.7 Version : 2.7.16-2+deb10u2 CVE ID : CVE-2015-20107 CVE-2019-20907 CVE-2020-8492 CVE-2020-26116 CVE-2021-3177 CVE-2021-3733 CVE-2021-3737 CVE-2021-4189 CVE-2022-45061 Debian Bug : 970099

Multiple security issues were discovered in Python, an interactive high-level object-oriented language. An attacker may cause command injection, denial of service (DoS), request smuggling and port scanning.

CVE-2015-20107

The mailcap module does not add escape characters into commands discovered in the system mailcap file. This may allow attackers to inject shell commands into applications that call mailcap.findmatch with untrusted input (if they lack validation of user-provided filenames or arguments).

CVE-2019-20907

In Lib/tarfile.py, an attacker is able to craft a TAR archive leading to an infinite loop when opened by tarfile.open, because
_proc_pax lacks header validation.

CVE-2020-8492

Python allows an HTTP server to conduct Regular Expression Denial of Service (ReDoS) attacks against a client because of urllib.request.AbstractBasicAuthHandler catastrophic backtracking.

CVE-2020-26116

http.client allows CRLF injection if the attacker controls the HTTP request method, as demonstrated by inserting CR and LF control characters in the first argument of HTTPConnection.request.

CVE-2021-3177

Python has a buffer overflow in PyCArg_repr in _ctypes/callproc.c, which may lead to remote code execution in certain Python applications that accept floating-point numbers as untrusted input, as demonstrated by a 1e300 argument to c_double.from_param. This occurs because sprintf is used unsafely.

CVE-2021-3733

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.

CVE-2021-3737

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.

CVE-2021-4189

The FTP (File Transfer Protocol) client library in PASV (passive) mode trusts the host from the PASV response by default. This flaw allows an attacker to set up a malicious FTP server that can trick FTP clients into connecting back to a given IP address and port. This vulnerability could lead to FTP client scanning ports. For the rare user who wants the previous behavior, set a `trust_server_pasv_ipv4_address` attribute on your `ftplib.FTP` instance to True.

CVE-2022-45061

An unnecessary quadratic algorithm exists in one path when processing some inputs to the IDNA (RFC 3490) decoder, such that a crafted, unreasonably long name being presented to the decoder could lead to a CPU denial of service.

For Debian 10 buster, these problems have been fixed in version 2.7.16-2+deb10u2.

We recommend that you upgrade your python2.7 packages.

For the detailed security status of python2.7 please refer to its security tracker page at:
https://security-tracker.debian.org/tracker/python2.7

Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS

Tenable has extracted the preceding description block directly from the Debian security advisory.

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

Solution

Upgrade the idle-python2.7 packages.

Plugin Details

Severity: Critical

ID: 176347

File Name: debian_DLA-3432.nasl

Version: 1.1

Type: local

Agent: unix

Family: Debian Local Security Checks

Published: 5/25/2023

Updated: 1/22/2025

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 8

Temporal Score: 6.3

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

CVSS Score Source: CVE-2015-20107

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.8

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

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

CVSS Score Source: CVE-2021-3177

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:python2.7-minimal, p-cpe:/a:debian:debian_linux:libpython2.7-minimal, p-cpe:/a:debian:debian_linux:python2.7-dev, p-cpe:/a:debian:debian_linux:libpython2.7, p-cpe:/a:debian:debian_linux:python2.7, p-cpe:/a:debian:debian_linux:libpython2.7-dev, cpe:/o:debian:debian_linux:10.0, p-cpe:/a:debian:debian_linux:libpython2.7-dbg, p-cpe:/a:debian:debian_linux:python2.7-doc, p-cpe:/a:debian:debian_linux:python2.7-dbg, p-cpe:/a:debian:debian_linux:libpython2.7-testsuite, p-cpe:/a:debian:debian_linux:libpython2.7-stdlib, p-cpe:/a:debian:debian_linux:python2.7-examples, p-cpe:/a:debian:debian_linux:idle-python2.7

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: 5/24/2023

Vulnerability Publication Date: 1/30/2020

Reference Information

CVE: CVE-2015-20107, CVE-2019-20907, CVE-2020-26116, CVE-2020-8492, CVE-2021-3177, CVE-2021-3733, CVE-2021-3737, CVE-2021-4189, CVE-2022-45061

Detections

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