Vulnerabilities > CVE-2017-12814 - Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in Perl

CVSS 9.8 - CRITICAL

Attack vector

NETWORK

Attack complexity

LOW

Privileges required

NONE

Confidentiality impact

HIGH

Integrity impact

HIGH

Availability impact

HIGH

network

low complexity

perl

CWE-119

critical

nessus

NVD

Published: 2017-09-28

Updated: 2020-07-15

Summary

Stack-based buffer overflow in the CPerlHost::Add method in win32/perlhost.h in Perl before 5.24.3-RC1 and 5.26.x before 5.26.1-RC1 on Windows allows attackers to execute arbitrary code via a long environment variable.

Vulnerable Configurations

Part	Description	Count
Application	Perl Perl Perl - Perl Perl 0.1 Perl Perl 0.2 Perl Perl 0.3 Perl Perl 0.4 Perl Perl 0.5 Perl Perl 0.52 Perl Perl 0.61 Perl Perl 0.62 Perl Perl 0.63 Perl Perl 0.64 Perl Perl 0.65 Perl Perl 0.66 Perl Perl 0.67 Perl Perl 0.68 Perl Perl 0.69 Perl Perl 0.70 Perl Perl 0.71 Perl Perl 0.72 Perl Perl 0.73 Perl Perl 0.80 Perl Perl 0.81 Perl Perl 0.82 Perl Perl 0.83 Perl Perl 0.84 Perl Perl 0.85 Perl Perl 0.86 Perl Perl 0.87 Perl Perl 0.88 Perl Perl 0.89 Perl Perl 0.90 Perl Perl 0.91 Perl Perl 0.92 Perl Perl 0.93 Perl Perl 0.94 Perl Perl 0.95 Perl Perl 0.96 Perl Perl 0.97 Perl Perl 0.98 Perl Perl 0.99 Perl Perl 1.00 Perl Perl 1.0.15 Perl Perl 1.0.16 Perl Perl 1.01 Perl Perl 1.20 Perl Perl 1.21 Perl Perl 1.22 Perl Perl 1.31 Perl Perl 1.32 Perl Perl 1.40 Perl Perl 1.41 Perl Perl 1.42 Perl Perl 1.43 Perl Perl 1.44 Perl Perl 1.45 Perl Perl 1.46 Perl Perl 1.47 Perl Perl 1.48 Perl Perl 1.49 Perl Perl 2.0.0 Perl Perl 2.1.0 Perl Perl 2.1.1 Perl Perl 2.1.2 Perl Perl 2.1.3 Perl Perl 2.2.0 Perl Perl 2.2.1 Perl Perl 2.2.2 Perl Perl 2.3.0 Perl Perl 2.4.0 Perl Perl 2.5.0 Perl Perl 2.5.1 Perl Perl 2.6.0 Perl Perl 2.6.1 Perl Perl 2.6.2 Perl Perl 2.6.3 Perl Perl 2.6.4 Perl Perl 2.6.5 Perl Perl 2.6.6 Perl Perl 2.7.0 Perl Perl 2.7.1 Perl Perl 2.7.2 Perl Perl 2.8.0 Perl Perl 2.8.1 Perl Perl 2.8.2 Perl Perl 2.8.3 Perl Perl 2.8.4 Perl Perl 2.8.5 Perl Perl 2.8.6 Perl Perl 2.8.7 Perl Perl 2.8.8 Perl Perl 2.9.0 Perl Perl 2.9.1 Perl Perl 2.9.2 Perl Perl 2.10.0 Perl Perl 2.10.1 Perl Perl 2.10.2 Perl Perl 2.10.3 Perl Perl 2.10.4 Perl Perl 2.10.5 Perl Perl 2.10.6 Perl Perl 2.10.7 Perl Perl 2.11.0 Perl Perl 2.11.1 Perl Perl 2.11.2 Perl Perl 2.11.3 Perl Perl 2.11.4 Perl Perl 2.11.5 Perl Perl 2.11.6 Perl Perl 2.11.7 Perl Perl 2.11.8 Perl Perl 2.12.0 Perl Perl 2.13.0 Perl Perl 2.14.0 Perl Perl 2.14.1 Perl Perl 2.15.0 Perl Perl 2.15.1 Perl Perl 2.16.0 Perl Perl 2.16.1 Perl Perl 2.17.0 Perl Perl 2.17.1 Perl Perl 2.17.2 Perl Perl 2.18.0 Perl Perl 2.18.1 Perl Perl 5.000 Perl Perl 5.000O Perl Perl 5.001 Perl Perl 5.001N Perl Perl 5.002 Perl Perl 5.002_01 Perl Perl 5.003 Perl Perl 5.003_01 Perl Perl 5.003_02 Perl Perl 5.003_03 Perl Perl 5.003_04 Perl Perl 5.003_05 Perl Perl 5.003_07 Perl Perl 5.003_08 Perl Perl 5.003_09 Perl Perl 5.003_10 Perl Perl 5.003_11 Perl Perl 5.003_12 Perl Perl 5.003_13 Perl Perl 5.003_14 Perl Perl 5.003_15 Perl Perl 5.003_16 Perl Perl 5.003_17 Perl Perl 5.003_18 Perl Perl 5.003_19 Perl Perl 5.003_20 Perl Perl 5.003_21 Perl Perl 5.003_22 Perl Perl 5.003_23 Perl Perl 5.003_24 Perl Perl 5.003_25 Perl Perl 5.003_26 Perl Perl 5.003_27 Perl Perl 5.003_28 Perl Perl 5.003_90 Perl Perl 5.003_91 Perl Perl 5.003_92 Perl Perl 5.003_93 Perl Perl 5.003_94 Perl Perl 5.003_95 Perl Perl 5.003_96 Perl Perl 5.003_97 Perl Perl 5.003_97A Perl Perl 5.003_97B Perl Perl 5.003_97C Perl Perl 5.003_97D Perl Perl 5.003_97E Perl Perl 5.003_97F Perl Perl 5.003_97G Perl Perl 5.003_97H Perl Perl 5.003_97I Perl Perl 5.003_97J Perl Perl 5.003_98 Perl Perl 5.003_99 Perl Perl 5.003_99A Perl Perl 5.004 Perl Perl 5.004_01 Perl Perl 5.004_02 Perl Perl 5.004_03 Perl Perl 5.004_04 Perl Perl 5.004_05 Perl Perl 5.005 Perl Perl 5.005_01 Perl Perl 5.005_02 Perl Perl 5.005_03 Perl Perl 5.005_04 Perl Perl 5.6 Perl Perl 5.6.0 Perl Perl 5.6.1 Perl Perl 5.6.2 Perl Perl 5.7.3 Perl Perl 5.8 Perl Perl 5.8.0 Perl Perl 5.8.1 Perl Perl 5.8.2 Perl Perl 5.8.3 Perl Perl 5.8.4 Perl Perl 5.8.5 Perl Perl 5.8.6 Perl Perl 5.8.7 Perl Perl 5.8.8 Perl Perl 5.8.9 Perl Perl 5.8.10 Perl Perl 5.9.0 Perl Perl 5.9.1 Perl Perl 5.9.2 Perl Perl 5.9.3 Perl Perl 5.9.4 Perl Perl 5.9.5 Perl Perl 5.10 Perl Perl 5.10.0 Perl Perl 5.10.1 Perl Perl 5.11.0 Perl Perl 5.11.1 Perl Perl 5.11.2 Perl Perl 5.11.3 Perl Perl 5.11.4 Perl Perl 5.11.5 Perl Perl 5.12.0 Perl Perl 5.12.1 Perl Perl 5.12.2 Perl Perl 5.12.3 Perl Perl 5.12.4 Perl Perl 5.12.5 Perl Perl 5.13.0 Perl Perl 5.13.1 Perl Perl 5.13.2 Perl Perl 5.13.3 Perl Perl 5.13.4 Perl Perl 5.13.5 Perl Perl 5.13.6 Perl Perl 5.13.7 Perl Perl 5.13.8 Perl Perl 5.13.9 Perl Perl 5.13.10 Perl Perl 5.13.11 Perl Perl 5.14.0 Perl Perl 5.14.1 Perl Perl 5.14.2 Perl Perl 5.14.3 Perl Perl 5.14.4 Perl Perl 5.15.0 Perl Perl 5.15.1 Perl Perl 5.15.2 Perl Perl 5.15.3 Perl Perl 5.15.4 Perl Perl 5.15.5 Perl Perl 5.15.6 Perl Perl 5.15.7 Perl Perl 5.15.8 Perl Perl 5.15.9 Perl Perl 5.16.0 Perl Perl 5.16.1 Perl Perl 5.16.2 Perl Perl 5.16.3 Perl Perl 5.17.0 Perl Perl 5.17.1 Perl Perl 5.17.2 Perl Perl 5.17.3 Perl Perl 5.17.4 Perl Perl 5.17.5 Perl Perl 5.17.6 Perl Perl 5.17.7 Perl Perl 5.17.7.0 Perl Perl 5.17.8 Perl Perl 5.17.9 Perl Perl 5.17.10 Perl Perl 5.17.11 Perl Perl 5.18.0 Perl Perl 5.18.1 Perl Perl 5.18.2 Perl Perl 5.18.3 Perl Perl 5.18.4 Perl Perl 5.19.0 Perl Perl 5.19.1 Perl Perl 5.19.2 Perl Perl 5.19.3 Perl Perl 5.19.4 Perl Perl 5.19.5 Perl Perl 5.19.6 Perl Perl 5.19.7 Perl Perl 5.19.8 Perl Perl 5.19.9 Perl Perl 5.19.10 Perl Perl 5.19.11 Perl Perl 5.20.0 Perl Perl 5.20.1 Perl Perl 5.20.2 Perl Perl 5.20.3 Perl Perl 5.21.0 Perl Perl 5.21.1 Perl Perl 5.21.2 Perl Perl 5.21.3 Perl Perl 5.21.4 Perl Perl 5.21.5 Perl Perl 5.21.6 Perl Perl 5.21.7 Perl Perl 5.21.8 Perl Perl 5.21.9 Perl Perl 5.21.10 Perl Perl 5.21.11 Perl Perl 5.22 Perl Perl 5.22.0 Perl Perl 5.22.1 Perl Perl 5.22.2 Perl Perl 5.22.3 Perl Perl 5.22.4 Perl Perl 5.23.0 Perl Perl 5.23.1 Perl Perl 5.23.2 Perl Perl 5.23.3 Perl Perl 5.23.4 Perl Perl 5.23.5 Perl Perl 5.23.6 Perl Perl 5.23.7 Perl Perl 5.23.8 Perl Perl 5.23.9 Perl Perl 5.24.0 Perl Perl 5.24.1 Perl Perl 5.24.2 Perl Perl 5.26.0	398
OS	Microsoft Microsoft Windows -	1

Common Weakness Enumeration (CWE)

CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer

Common Attack Pattern Enumeration and Classification (CAPEC)

Buffer Overflow via Environment Variables
This attack pattern involves causing a buffer overflow through manipulation of environment variables. Once the attacker finds that they can modify an environment variable, they may try to overflow associated buffers. This attack leverages implicit trust often placed in environment variables.
Overflow Buffers
Buffer Overflow attacks target improper or missing bounds checking on buffer operations, typically triggered by input injected by an attacker. As a consequence, an attacker is able to write past the boundaries of allocated buffer regions in memory, causing a program crash or potentially redirection of execution as per the attackers' choice.
Client-side Injection-induced Buffer Overflow
This type of attack exploits a buffer overflow vulnerability in targeted client software through injection of malicious content from a custom-built hostile service.
Filter Failure through Buffer Overflow
In this attack, the idea is to cause an active filter to fail by causing an oversized transaction. An attacker may try to feed overly long input strings to the program in an attempt to overwhelm the filter (by causing a buffer overflow) and hoping that the filter does not fail securely (i.e. the user input is let into the system unfiltered).
MIME Conversion
An attacker exploits a weakness in the MIME conversion routine to cause a buffer overflow and gain control over the mail server machine. The MIME system is designed to allow various different information formats to be interpreted and sent via e-mail. Attack points exist when data are converted to MIME compatible format and back.

Nessus

NASL family	FreeBSD Local Security Checks
NASL id	FREEBSD_PKG_D9E82328A12911E7987E4F174049B30A.NASL
description	SO-AND-SO reports : CVE-2017-12814: $ENV{$key} stack-based buffer overflow on Windows A possible stack-based buffer overflow in the %ENV code on Windows has been fixed by removing the buffer completely since it was superfluous anyway. CVE-2017-12837: Heap buffer overflow in regular expression compiler Compiling certain regular expression patterns with the case-insensitive modifier could cause a heap buffer overflow and crash perl. This has now been fixed. CVE-2017-12883: Buffer over-read in regular expression parser For certain types of syntax error in a regular expression pattern, the error message could either contain the contents of a random, possibly large, chunk of memory, or could crash perl. This has now been fixed.
last seen	2020-06-01
modified	2020-06-02
plugin id	103442
published	2017-09-25
reporter	This script is Copyright (C) 2017-2018 and is owned by Tenable, Inc. or an Affiliate thereof.
source	https://www.tenable.com/plugins/nessus/103442
title	FreeBSD : perl -- multiple vulnerabilities (d9e82328-a129-11e7-987e-4f174049b30a)
code	# # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from the FreeBSD VuXML database : # # Copyright 2003-2018 Jacques Vidrine and contributors # # Redistribution and use in source (VuXML) and 'compiled' forms (SGML, # HTML, PDF, PostScript, RTF and so forth) with or without modification, # are permitted provided that the following conditions are met: # 1. Redistributions of source code (VuXML) must retain the above # copyright notice, this list of conditions and the following # disclaimer as the first lines of this file unmodified. # 2. Redistributions in compiled form (transformed to other DTDs, # published online in any format, converted to PDF, PostScript, # RTF and other formats) must reproduce the above copyright # notice, this list of conditions and the following disclaimer # in the documentation and/or other materials provided with the # distribution. # # THIS DOCUMENTATION IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "AS IS" # AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, # THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR # PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS # BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, # OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT # OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR # BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, # WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE # OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS DOCUMENTATION, # EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. # include("compat.inc"); if (description) { script_id(103442); script_version("3.5"); script_cvs_date("Date: 2018/11/10 11:49:46"); script_cve_id("CVE-2017-12814", "CVE-2017-12837", "CVE-2017-12883"); script_name(english:"FreeBSD : perl -- multiple vulnerabilities (d9e82328-a129-11e7-987e-4f174049b30a)"); script_summary(english:"Checks for updated packages in pkg_info output"); script_set_attribute( attribute:"synopsis", value: "The remote FreeBSD host is missing one or more security-related updates." ); script_set_attribute( attribute:"description", value: "SO-AND-SO reports : CVE-2017-12814: $ENV{$key} stack-based buffer overflow on Windows A possible stack-based buffer overflow in the %ENV code on Windows has been fixed by removing the buffer completely since it was superfluous anyway. CVE-2017-12837: Heap buffer overflow in regular expression compiler Compiling certain regular expression patterns with the case-insensitive modifier could cause a heap buffer overflow and crash perl. This has now been fixed. CVE-2017-12883: Buffer over-read in regular expression parser For certain types of syntax error in a regular expression pattern, the error message could either contain the contents of a random, possibly large, chunk of memory, or could crash perl. This has now been fixed." ); script_set_attribute( attribute:"see_also", value:"https://metacpan.org/changes/release/SHAY/perl-5.24.3" ); script_set_attribute( attribute:"see_also", value:"https://metacpan.org/changes/release/SHAY/perl-5.26.1" ); # https://vuxml.freebsd.org/freebsd/d9e82328-a129-11e7-987e-4f174049b30a.html script_set_attribute( attribute:"see_also", value:"http://www.nessus.org/u?ea8d04c7" ); script_set_attribute(attribute:"solution", value:"Update the affected packages."); script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P"); script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:freebsd:freebsd:perl5"); script_set_attribute(attribute:"cpe", value:"cpe:/o:freebsd:freebsd"); script_set_attribute(attribute:"vuln_publication_date", value:"2017/09/19"); script_set_attribute(attribute:"patch_publication_date", value:"2017/09/24"); script_set_attribute(attribute:"plugin_publication_date", value:"2017/09/25"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2017-2018 and is owned by Tenable, Inc. or an Affiliate thereof."); script_family(english:"FreeBSD Local Security Checks"); script_dependencies("ssh_get_info.nasl"); script_require_keys("Host/local_checks_enabled", "Host/FreeBSD/release", "Host/FreeBSD/pkg_info"); exit(0); } include("audit.inc"); include("freebsd_package.inc"); if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED); if (!get_kb_item("Host/FreeBSD/release")) audit(AUDIT_OS_NOT, "FreeBSD"); if (!get_kb_item("Host/FreeBSD/pkg_info")) audit(AUDIT_PACKAGE_LIST_MISSING); flag = 0; if (pkg_test(save_report:TRUE, pkg:"perl5>=5.24.0<5.24.3")) flag++; if (pkg_test(save_report:TRUE, pkg:"perl5>=5.26.0<5.26.1")) flag++; if (flag) { if (report_verbosity > 0) security_hole(port:0, extra:pkg_report_get()); else security_hole(0); exit(0); } else audit(AUDIT_HOST_NOT, "affected");

Summary

Vulnerable Configurations

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

Nessus

References