Git for Windows 2.7.x < 2.7.6 / 2.8.x < 2.8.6 / 2.9.x < 2.9.5 / 2.10.x < 2.10.4 / 2.11.x < 2.11.13 / 2.12.x < 2.12.4 / 2.13.x < 2.13.5 / 2.14.x < 2.14.1 Malicious SSH URL Command Execution - Nessus

High Plugin ID: 102494

This page contains detailed information about the Git for Windows 2.7.x < 2.7.6 / 2.8.x < 2.8.6 / 2.9.x < 2.9.5 / 2.10.x < 2.10.4 / 2.11.x < 2.11.13 / 2.12.x < 2.12.4 / 2.13.x < 2.13.5 / 2.14.x < 2.14.1 Malicious SSH URL Command Execution Nessus plugin including available exploits and PoCs found on GitHub, in Metasploit or Exploit-DB for verifying of this vulnerability.

Table Of Contents

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Plugin Overview
Vulnerability Information

Synopsis
Description
Solution

Public Exploits
Risk Information
Plugin Source
How to Run
References
Version

Plugin Overview

ID: 102494
Name: Git for Windows 2.7.x < 2.7.6 / 2.8.x < 2.8.6 / 2.9.x < 2.9.5 / 2.10.x < 2.10.4 / 2.11.x < 2.11.13 / 2.12.x < 2.12.4 / 2.13.x < 2.13.5 / 2.14.x < 2.14.1 Malicious SSH URL Command Execution
Filename: git_for_windows_2_14_1.nasl
Vulnerability Published: 2017-08-10
This Plugin Published: 2017-08-15
Last Modification Time: 2019-11-12
Plugin Version: 1.4
Plugin Type: local
Plugin Family: Windows
Dependencies: git_for_windows_installed.nbin
Required KB Items [?]: installed_sw/Git for Windows

Vulnerability Information

Severity: High
Vulnerability Published: 2017-08-10
Patch Published: 2017-08-10
CVE [?]: CVE-2017-1000117
CPE [?]: cpe:/a:git_for_windows_project:git_for_windows

Synopsis

The remote Windows host has an application installed that is affected by a command execution vulnerability.

Description

The version of Git for Windows installed on the remote host is version 2.7.x prior to 2.7.6, 2.8.x prior to 2.8.6, 2.9.x prior to 2.9.5, 2.10.x prior to 2.10.4, 2.11.x prior to 2.11.13, 2.12.x prior to 2.12.4, 2.13.x prior to 2.13.5, or 2.14.x prior to 2.14.1. It is, therefore, affected by a command execution vulnerability due to a flaw in the handling of 'ssh://' URLs that begin with a dash. A maliciously crafted 'ssh://' URL causes Git clients to run an arbitrary shell command. Such a URL could be placed in the .gitmodules file of a malicious project, and an unsuspecting victim could be tricked into running 'git clone --recurse-submodules' to trigger the vulnerability.

Solution

Upgrade to Git for Windows 2.7.6 / 2.8.6 / 2.9.5 / 2.10.4 / 2.11.13 / 2.12.4 / 2.13.5 / 2.14.1 or later.

Public Exploits

Target Network Port(s): N/A
Target Asset(s): N/A
Exploit Available: True (Metasploit Framework, Exploit-DB, GitHub)
Exploit Ease: Exploits are available

Here's the list of publicly known exploits and PoCs for verifying the Git for Windows 2.7.x < 2.7.6 / 2.8.x < 2.8.6 / 2.9.x < 2.9.5 / 2.10.x < 2.10.4 / 2.11.x < 2.11.13 / 2.12.x < 2.12.4 / 2.13.x < 2.13.5 / 2.14.x < 2.14.1 Malicious SSH URL Command Execution vulnerability:

Metasploit: exploit/multi/http/git_submodule_command_exec
[Malicious Git HTTP Server For CVE-2017-1000117]
Exploit-DB: exploits/python/remote/42599.rb
[EDB-42599: Git < 2.7.5 - Command Injection (Metasploit)]
GitHub: https://github.com/Jerry-zhuang/CVE-2017-1000117
[CVE-2017-1000117]
GitHub: https://github.com/M1a0rz/test
[CVE-2017-1000117]
GitHub: https://github.com/Manouchehri/CVE-2017-1000117
[CVE-2017-1000117]
GitHub: https://github.com/Q2h1Cg/CVE-2017-1000117
[CVE-2017-1000117]
GitHub: https://github.com/VulApps/CVE-2017-1000117
[CVE-2017-1000117]
GitHub: https://github.com/bells17/CVE-2017-1000117
[CVE-2017-1000117: https://github.com/greymd/CVE-2017-1000117 の勉強用]
GitHub: https://github.com/dfgfdug8df7/some
[CVE-2017-1000117]
GitHub: https://github.com/ieee0824/CVE-2017-1000117
[CVE-2017-1000117]
GitHub: https://github.com/ikmski/CVE-2017-1000117
[CVE-2017-1000117]
GitHub: https://github.com/leezp/CVE-2017-1000117
[CVE-2017-1000117]
GitHub: https://github.com/mtrampic/cvedetails_nifi_web_scrape
[CVE-2017-1000117]
GitHub: https://github.com/sasairc/CVE-2017-1000117_wasawasa
[CVE-2017-1000117]
GitHub: https://github.com/shogo82148/Fix-CVE-2017-1000117
[CVE-2017-1000117]
GitHub: https://github.com/siling2017/CVE-2017-1000117
[CVE-2017-1000117]
GitHub: https://github.com/simith003/demo
[CVE-2017-1000117]
GitHub: https://github.com/takehaya/CVE-2017-1000117
[CVE-2017-1000117]
GitHub: https://github.com/thelastbyte/CVE-2017-1000117
[CVE-2017-1000117]
GitHub: https://github.com/tigerszk/ssmjp-100th-message
[CVE-2017-1000117]
GitHub: https://github.com/vulsio/gost
[CVE-2017-1000117]
GitHub: http://bobao.360.cn/learning/detail/4244.html
[CVE-2017-1000117]
GitHub: https://github.com/AnonymKing/CVE-2017-1000117
[CVE-2017-1000117: CVE-2017-1000117漏洞复现（PoC+Exp）]
GitHub: https://github.com/cved-sources/cve-2017-1000117
[CVE-2017-1000117: Cve-2017-1000117]
GitHub: https://github.com/GrahamMThomas/test-git-vuln_CVE-2017-1000117
[CVE-2017-1000117: Repo to test the new git vulnerability]
GitHub: https://github.com/greymd/CVE-2017-1000117
[CVE-2017-1000117: Check Git's vulnerability CVE-2017-1000117]
GitHub: https://github.com/ieee0824/CVE-2017-1000117-sl
[CVE-2017-1000117: Experiment of CVE-2017-1000117]
GitHub: https://github.com/nkoneko/CVE-2017-1000117
[CVE-2017-1000117: GitのCommand Injectionの脆弱性を利用してスクリプトを落として実行する例]
GitHub: https://github.com/rootclay/CVE-2017-1000117
[CVE-2017-1000117]
GitHub: https://github.com/Shadow5523/CVE-2017-1000117-test
[CVE-2017-1000117: CVE-2017-1000117の検証]
GitHub: https://github.com/timwr/CVE-2017-1000117
[CVE-2017-1000117: Proof of concept of CVE-2017-1000117]
GitHub: https://github.com/alilangtest/CVE-2017-1000117
[CVE-2017-1000117: Test]
GitHub: https://github.com/chenzhuo0618/test
[CVE-2017-1000117: Test for CVE-2017-1000117]

Before running any exploit against any system, make sure you are authorized by the owner of the target system(s) to perform such activity. In any other case, this would be considered as an illegal activity.

WARNING: Beware of using unverified exploits from sources such as GitHub or Exploit-DB. These exploits and PoCs could contain malware. For more information, see how to use exploits safely.

Risk Information

CVSS Score Source [?]: CVE-2017-1000117
CVSS V2 Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P/E:F/RL:OF/RC:C

CVSS Base Score:	6.8 (Medium)
Impact Subscore:	6.4
Exploitability Subscore:	8.6
CVSS Temporal Score:	5.6 (Medium)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	5.6 (Medium)

CVSS V3 Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C

CVSS Base Score:	8.8 (High)
Impact Subscore:	5.9
Exploitability Subscore:	2.8
CVSS Temporal Score:	8.2 (High)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	8.2 (High)

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Plugin Source

#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(102494);
  script_version("1.4");
  script_cvs_date("Date: 2019/11/12");

  script_cve_id("CVE-2017-1000117");

  script_name(english:"Git for Windows 2.7.x < 2.7.6 / 2.8.x < 2.8.6 / 2.9.x < 2.9.5 / 2.10.x < 2.10.4 / 2.11.x < 2.11.13 / 2.12.x < 2.12.4 / 2.13.x < 2.13.5 / 2.14.x < 2.14.1 Malicious SSH URL Command Execution");
  script_summary(english:"Checks the version of git.exe.");

  script_set_attribute(attribute:"synopsis", value:
"The remote Windows host has an application installed that is affected
by a command execution vulnerability.");
  script_set_attribute(attribute:"description", value:
"The version of Git for Windows installed on the remote host is version
2.7.x prior to 2.7.6, 2.8.x prior to 2.8.6, 2.9.x prior to 2.9.5,
2.10.x prior to 2.10.4, 2.11.x prior to 2.11.13, 2.12.x prior to
2.12.4, 2.13.x prior to 2.13.5, or 2.14.x prior to 2.14.1. It is,
therefore, affected by a command execution vulnerability due to a flaw
in the handling of 'ssh://' URLs that begin with a dash. A maliciously
crafted 'ssh://' URL causes Git clients to run an arbitrary shell
command. Such a URL could be placed in the .gitmodules file of a
malicious project, and an unsuspecting victim could be tricked into
running 'git clone --recurse-submodules' to trigger the vulnerability.");
  # https://public-inbox.org/git/[email protected]/T/#u
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?894dcb77");
  # https://github.com/git-for-windows/git/releases/tag/v2.14.1.windows.1
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?c0aca1c0");
  # https://github.com/git/git/blob/master/Documentation/RelNotes/2.7.6.txt
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?4798389e");
  # https://github.com/git/git/blob/master/Documentation/RelNotes/2.8.6.txt
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?a099ed51");
  # https://github.com/git/git/blob/master/Documentation/RelNotes/2.9.5.txt
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?4c6ad422");
  # https://github.com/git/git/blob/master/Documentation/RelNotes/2.10.4.txt
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?6a506ef2");
  # https://github.com/git/git/blob/master/Documentation/RelNotes/2.11.13.txt
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?0d9668c9");
  # https://github.com/git/git/blob/master/Documentation/RelNotes/2.12.4.txt
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?d38639e5");
  # https://github.com/git/git/blob/master/Documentation/RelNotes/2.13.5.txt
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?aea2c8f6");
  # https://github.com/git/git/blob/master/Documentation/RelNotes/2.14.1.txt
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?aafcb0d4");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Git for Windows 2.7.6 / 2.8.6 / 2.9.5 / 2.10.4 / 2.11.13 / 2.12.4 / 2.13.5 / 2.14.1 or later.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:F/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:F/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2017-1000117");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"metasploit_name", value:'Malicious Git HTTP Server For CVE-2017-1000117');
  script_set_attribute(attribute:"exploit_framework_metasploit", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/08/10");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/08/10");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/08/15");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:git_for_windows_project:git_for_windows");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Windows");

  script_copyright(english:"This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("git_for_windows_installed.nbin");
  script_require_keys("installed_sw/Git for Windows");

  exit(0);
}

include("vcf.inc");

app_name = "Git for Windows";

app_info = vcf::get_app_info(app:app_name, win_local:TRUE);

vcf::check_granularity(app_info:app_info, sig_segments:3);

constraints = [
  { "min_version" : "2.7", "fixed_version" : "2.7.6" },
  { "min_version" : "2.8", "fixed_version" : "2.8.6" },
  { "min_version" : "2.9", "fixed_version" : "2.9.5" },
  { "min_version" : "2.10", "fixed_version" : "2.10.4" },
  { "min_version" : "2.11", "fixed_version" : "2.11.13" },
  { "min_version" : "2.12", "fixed_version" : "2.12.4" },
  { "min_version" : "2.13", "fixed_version" : "2.13.5" },
  { "min_version" : "2.14", "fixed_version" : "2.14.1" }
];

vcf::check_version_and_report(app_info:app_info, constraints:constraints, severity:SECURITY_WARNING);

The latest version of this script can be found in these locations depending on your platform:

Linux / Unix:
/opt/nessus/lib/nessus/plugins/git_for_windows_2_14_1.nasl
Windows:
C:\ProgramData\Tenable\Nessus\nessus\plugins\git_for_windows_2_14_1.nasl
Mac OS X:
/Library/Nessus/run/lib/nessus/plugins/git_for_windows_2_14_1.nasl

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How to Run

Here is how to run the Git for Windows 2.7.x < 2.7.6 / 2.8.x < 2.8.6 / 2.9.x < 2.9.5 / 2.10.x < 2.10.4 / 2.11.x < 2.11.13 / 2.12.x < 2.12.4 / 2.13.x < 2.13.5 / 2.14.x < 2.14.1 Malicious SSH URL Command Execution as a standalone plugin via the Nessus web user interface (https://localhost:8834/):

Click to start a New Scan.
Select Advanced Scan.
Navigate to the Plugins tab.
On the top right corner click to Disable All plugins.
On the left side table select Windows plugin family.
On the right side table select Git for Windows 2.7.x < 2.7.6 / 2.8.x < 2.8.6 / 2.9.x < 2.9.5 / 2.10.x < 2.10.4 / 2.11.x < 2.11.13 / 2.12.x < 2.12.4 / 2.13.x < 2.13.5 / 2.14.x < 2.14.1 Malicious SSH URL Command Execution plugin ID 102494.
Specify the target on the Settings tab and click to Save the scan.
Run the scan.

Here are a few examples of how to run the plugin in the command line. Note that the examples below demonstrate the usage on the Linux / Unix platform.

Basic usage:

/opt/nessus/bin/nasl git_for_windows_2_14_1.nasl -t <IP/HOST>

Run the plugin with audit trail message on the console:

/opt/nessus/bin/nasl -a git_for_windows_2_14_1.nasl -t <IP/HOST>

Run the plugin with trace script execution written to the console (useful for debugging):

/opt/nessus/bin/nasl -T - git_for_windows_2_14_1.nasl -t <IP/HOST>

Run the plugin with using a state file for the target and updating it (useful for running multiple plugins on the target):

/opt/nessus/bin/nasl -K /tmp/state git_for_windows_2_14_1.nasl -t <IP/HOST>

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References

See also:

Similar and related Nessus plugins:

102870 - Amazon Linux AMI : git (ALAS-2017-882)
102769 - CentOS 7 : git (CESA-2017:2484)
102549 - CentOS 6 : git (CESA-2017:2485)
102788 - Debian DLA-1068-1 : git security update
102374 - Debian DSA-3934-1 : git - security update
103025 - EulerOS 2.0 SP1 : git (EulerOS-SA-2017-1187)
103026 - EulerOS 2.0 SP2 : git (EulerOS-SA-2017-1188)
124888 - EulerOS Virtualization for ARM 64 3.0.1.0 : git (EulerOS-SA-2019-1385)
124923 - EulerOS Virtualization 3.0.1.0 : git (EulerOS-SA-2019-1420)
102458 - Fedora 25 : git (2017-8ba7572cfd)
102461 - Fedora 26 : git (2017-b1b3ae6666)
103278 - GLSA-201709-10 : Git: Command injection
103359 - Apple Xcode < 9.0 Multiple RCE (macOS)
127364 - NewStart CGSL MAIN 4.05 : git Vulnerability (NS-SA-2019-0120)
102558 - openSUSE Security Update : git (openSUSE-2017-939)
102943 - openSUSE Security Update : git (openSUSE-2017-988)
102534 - Oracle Linux 7 : git (ELSA-2017-2484)
102569 - Oracle Linux 6 : git (ELSA-2017-2485)
102537 - RHEL 7 : git (RHSA-2017:2484)
102538 - RHEL 6 : git (RHSA-2017:2485)
103349 - RHEL 7 : Mobile Application Platform (RHSA-2017:2674)
102576 - Scientific Linux Security Update : git on SL6.x i386/x86_64 (20170817)
102674 - Scientific Linux Security Update : git on SL7.x x86_64 (20170817)
102432 - Slackware 13.0 / 13.1 / 13.37 / 14.0 / 14.1 / 14.2 / current : git (SSA:2017-223-01)
102914 - SUSE SLES12 Security Update : git (SUSE-SU-2017:2320-1)
135580 - SUSE SLES12 Security Update : git (SUSE-SU-2020:0992-1)
102423 - Ubuntu 14.04 LTS / 16.04 LTS / 17.04 : git vulnerability (USN-3387-1)
119223 - Virtuozzo 6 : emacs-git / emacs-git-el / git / git-all / git-cvs / etc (VZLSA-2017-2485)
80306 - Git for Windows .git/config Command Execution
110270 - Git for Windows 2.13.x < 2.13.7 / 2.14.x < 2.14.4 / 2.15.x < 2.15.2 / 2.16.x < 2.16.4 / 2.17.x < 2.17.1 Remote Code Execution
51370 - Git gitweb Multiple Parameter XSS

Version

This page has been produced using Nessus Professional 10.1.2 (#68) LINUX, Plugin set 202205072148.
Plugin file git_for_windows_2_14_1.nasl version 1.4. For more plugins, visit the Nessus Plugin Library.

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Git for Windows 2.7.x < 2.7.6 / 2.8.x < 2.8.6 / 2.9.x < 2.9.5 / 2.10.x < 2.10.4 / 2.11.x < 2.11.13 / 2.12.x < 2.12.4 / 2.13.x < 2.13.5 / 2.14.x < 2.14.1 Malicious SSH URL Command Execution - Nessus

Plugin Overview

Vulnerability Information

Synopsis

Description

Solution

Public Exploits

Risk Information

Plugin Source

How to Run

References

Version

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