Fedora 26 : git (2017-b1b3ae6666) - Nessus

High Plugin ID: 102461

This page contains detailed information about the Fedora 26 : git (2017-b1b3ae6666) 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: 102461
Name: Fedora 26 : git (2017-b1b3ae6666)
Filename: fedora_2017-b1b3ae6666.nasl
Vulnerability Published: 2017-10-05
This Plugin Published: 2017-08-14
Last Modification Time: 2021-01-06
Plugin Version: 3.8
Plugin Type: local
Plugin Family: Fedora Local Security Checks
Dependencies: ssh_get_info.nasl
Required KB Items [?]: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list

Vulnerability Information

Severity: High
Vulnerability Published: 2017-10-05
Patch Published: 2017-08-13
CVE [?]: CVE-2017-1000117
CPE [?]: cpe:/o:fedoraproject:fedora:26, p-cpe:/a:fedoraproject:fedora:git

Synopsis

The remote Fedora host is missing a security update.

Description

Resolve an arbitrary code execution vulnerability via crafted 'ssh://' URL (CVE-2017-1000117).

From the [release announcement](https://public-inbox.org/git/[email protected] v.corp.google.com/) :

A malicious third-party can give a crafted 'ssh://...' URL to an unsuspecting victim, and an attempt to visit the URL can result in any program that exists on the victim's machine being executed. 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.

Credits to find and fix the issue go to Brian Neel at GitLab, Joern Schneeweisz of Recurity Labs and Jeff King at GitHub.

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Solution

Update the affected git package.

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 Fedora 26 : git (2017-b1b3ae6666) 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 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

#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Fedora Security Advisory FEDORA-2017-b1b3ae6666.
#

include('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(102461);
  script_version("3.8");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/06");

  script_cve_id("CVE-2017-1000117");
  script_xref(name:"FEDORA", value:"2017-b1b3ae6666");

  script_name(english:"Fedora 26 : git (2017-b1b3ae6666)");
  script_summary(english:"Checks rpm output for the updated package.");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Fedora host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"Resolve an arbitrary code execution vulnerability via crafted 'ssh://'
URL (CVE-2017-1000117).

From the [release
announcement](https://public-inbox.org/git/[email protected]
v.corp.google.com/) :

A malicious third-party can give a crafted 'ssh://...' URL to an
unsuspecting victim, and an attempt to visit the URL can result in any
program that exists on the victim's machine being executed. 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.

Credits to find and fix the issue go to Brian Neel at
GitLab, Joern Schneeweisz of Recurity Labs and Jeff King at
GitHub.

Note that Tenable Network Security has extracted the preceding
description block directly from the Fedora update system website.
Tenable has attempted to automatically clean and format it as much as
possible without introducing additional issues."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bodhi.fedoraproject.org/updates/FEDORA-2017-b1b3ae6666"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected git package.");
  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:"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:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fedoraproject:fedora:git");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:26");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/10/05");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/08/13");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/08/14");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2017-2021 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Fedora Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/RedHat/release", "Host/RedHat/rpm-list");

  exit(0);
}


include("audit.inc");
include("global_settings.inc");
include("rpm.inc");


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/RedHat/release");
if (isnull(release) || "Fedora" >!< release) audit(AUDIT_OS_NOT, "Fedora");
os_ver = pregmatch(pattern: "Fedora.*release ([0-9]+)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Fedora");
os_ver = os_ver[1];
if (! preg(pattern:"^26([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Fedora 26", "Fedora " + os_ver);

if (!get_kb_item("Host/RedHat/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);


cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Fedora", cpu);


flag = 0;
if (rpm_check(release:"FC26", reference:"git-2.13.5-1.fc26")) flag++;


if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    extra      : rpm_report_get()
  );
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "git");
}

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

Linux / Unix:
/opt/nessus/lib/nessus/plugins/fedora_2017-b1b3ae6666.nasl
Windows:
C:\ProgramData\Tenable\Nessus\nessus\plugins\fedora_2017-b1b3ae6666.nasl
Mac OS X:
/Library/Nessus/run/lib/nessus/plugins/fedora_2017-b1b3ae6666.nasl

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How to Run

Here is how to run the Fedora 26 : git (2017-b1b3ae6666) 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 Fedora Local Security Checks plugin family.
On the right side table select Fedora 26 : git (2017-b1b3ae6666) plugin ID 102461.
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 fedora_2017-b1b3ae6666.nasl -t <IP/HOST>

Run the plugin with audit trail message on the console:

/opt/nessus/bin/nasl -a fedora_2017-b1b3ae6666.nasl -t <IP/HOST>

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

/opt/nessus/bin/nasl -T - fedora_2017-b1b3ae6666.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 fedora_2017-b1b3ae6666.nasl -t <IP/HOST>

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References

Fedora Security Update:

2017-b1b3ae6666

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)
103278 - GLSA-201709-10 : Git: Command injection
102494 - 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
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)

Version

This page has been produced using Nessus Professional 10.1.2 (#68) LINUX, Plugin set 202205072148.
Plugin file fedora_2017-b1b3ae6666.nasl version 3.8. For more plugins, visit the Nessus Plugin Library.

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Fedora 26 : git (2017-b1b3ae6666) - Nessus

Plugin Overview

Vulnerability Information

Synopsis

Description

Solution

Public Exploits

Risk Information

Plugin Source

How to Run

References

Version

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