Scientific Linux Security Update : mercurial on SL6.x, SL7.x i386/x86_64 (20170627) - Nessus

High Plugin ID: 101079

This page contains detailed information about the Scientific Linux Security Update : mercurial on SL6.x, SL7.x i386/x86_64 (20170627) 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: 101079
Name: Scientific Linux Security Update : mercurial on SL6.x, SL7.x i386/x86_64 (20170627)
Filename: sl_20170627_mercurial_on_SL6_x.nasl
Vulnerability Published: 2017-06-06
This Plugin Published: 2017-06-28
Last Modification Time: 2021-01-14
Plugin Version: 3.7
Plugin Type: local
Plugin Family: Scientific Linux Local Security Checks
Dependencies: ssh_get_info.nasl
Required KB Items [?]: Host/cpu, Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list

Vulnerability Information

Severity: High
Vulnerability Published: 2017-06-06
Patch Published: 2017-06-27
CVE [?]: CVE-2017-9462
CPE [?]: p-cpe:/a:fermilab:scientific_linux:emacs-mercurial, p-cpe:/a:fermilab:scientific_linux:emacs-mercurial-el, p-cpe:/a:fermilab:scientific_linux:mercurial, p-cpe:/a:fermilab:scientific_linux:mercurial-debuginfo, p-cpe:/a:fermilab:scientific_linux:mercurial-hgk, x-cpe:/o:fermilab:scientific_linux

Synopsis

The remote Scientific Linux host is missing one or more security updates.

Description

Security Fix(es) :

- A flaw was found in the way 'hg serve --stdio' command in Mercurial handled command-line options. A remote, authenticated attacker could use this flaw to execute arbitrary code on the Mercurial server by using specially crafted command-line options. (CVE-2017-9462)

Solution

Update the affected packages.

Public Exploits

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

Here's the list of publicly known exploits and PoCs for verifying the Scientific Linux Security Update : mercurial on SL6.x, SL7.x i386/x86_64 (20170627) vulnerability:

Metasploit: exploit/linux/ssh/mercurial_ssh_exec
[Mercurial Custom hg-ssh Wrapper Remote Code Exec]

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.

Risk Information

CVSS V2 Vector [?]: AV:N/AC:L/Au:S/C:C/I:C/A:C/E:F/RL:OF/RC:C

CVSS Base Score:	9.0 (High)
Impact Subscore:	10.0
Exploitability Subscore:	8.0
CVSS Temporal Score:	7.4 (High)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	7.4 (High)

CVSS V3 Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/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 is (C) Scientific Linux.
#

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

if (description)
{
  script_id(101079);
  script_version("3.7");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/14");

  script_cve_id("CVE-2017-9462");

  script_name(english:"Scientific Linux Security Update : mercurial on SL6.x, SL7.x i386/x86_64 (20170627)");
  script_summary(english:"Checks rpm output for the updated packages");

  script_set_attribute(
    attribute:"synopsis", 
    value:
"The remote Scientific Linux host is missing one or more security
updates."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"Security Fix(es) :

  - A flaw was found in the way 'hg serve --stdio' command
    in Mercurial handled command-line options. A remote,
    authenticated attacker could use this flaw to execute
    arbitrary code on the Mercurial server by using
    specially crafted command-line options. (CVE-2017-9462)"
  );
  # https://listserv.fnal.gov/scripts/wa.exe?A2=ind1706&L=scientific-linux-errata&F=&S=&P=6137
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?cb9c3a3c"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:C");
  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:L/UI:N/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:'Mercurial Custom hg-ssh Wrapper Remote Code Exec');
  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:fermilab:scientific_linux:emacs-mercurial");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:emacs-mercurial-el");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:mercurial");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:mercurial-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:mercurial-hgk");
  script_set_attribute(attribute:"cpe", value:"x-cpe:/o:fermilab:scientific_linux");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/06/06");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/06/27");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/06/28");
  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:"Scientific Linux Local Security Checks");

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

  exit(0);
}


include("audit.inc");
include("global_settings.inc");
include("misc_func.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) || "Scientific Linux " >!< release) audit(AUDIT_HOST_NOT, "running Scientific Linux");
os_ver = pregmatch(pattern: "Scientific Linux.*release ([0-9]+(\.[0-9]+)?)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Scientific Linux");
os_ver = os_ver[1];
if (! preg(pattern:"^7([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Scientific Linux 7.x", "Scientific Linux " + 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 (cpu >!< "x86_64" && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Scientific Linux", cpu);


flag = 0;
if (rpm_check(release:"SL6", reference:"emacs-mercurial-1.4-5.el6_9")) flag++;
if (rpm_check(release:"SL6", reference:"emacs-mercurial-el-1.4-5.el6_9")) flag++;
if (rpm_check(release:"SL6", reference:"mercurial-1.4-5.el6_9")) flag++;
if (rpm_check(release:"SL6", reference:"mercurial-debuginfo-1.4-5.el6_9")) flag++;
if (rpm_check(release:"SL6", reference:"mercurial-hgk-1.4-5.el6_9")) flag++;

if (rpm_check(release:"SL7", cpu:"x86_64", reference:"emacs-mercurial-2.6.2-7.el7_3")) flag++;
if (rpm_check(release:"SL7", cpu:"x86_64", reference:"emacs-mercurial-el-2.6.2-7.el7_3")) flag++;
if (rpm_check(release:"SL7", cpu:"x86_64", reference:"mercurial-2.6.2-7.el7_3")) flag++;
if (rpm_check(release:"SL7", cpu:"x86_64", reference:"mercurial-debuginfo-2.6.2-7.el7_3")) flag++;
if (rpm_check(release:"SL7", cpu:"x86_64", reference:"mercurial-hgk-2.6.2-7.el7_3")) flag++;


if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    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, "emacs-mercurial / emacs-mercurial-el / mercurial / etc");
}

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

Linux / Unix:
/opt/nessus/lib/nessus/plugins/sl_20170627_mercurial_on_SL6_x.nasl
Windows:
C:\ProgramData\Tenable\Nessus\nessus\plugins\sl_20170627_mercurial_on_SL6_x.nasl
Mac OS X:
/Library/Nessus/run/lib/nessus/plugins/sl_20170627_mercurial_on_SL6_x.nasl

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How to Run

Here is how to run the Scientific Linux Security Update : mercurial on SL6.x, SL7.x i386/x86_64 (20170627) 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 Scientific Linux Local Security Checks plugin family.
On the right side table select Scientific Linux Security Update : mercurial on SL6.x, SL7.x i386/x86_64 (20170627) plugin ID 101079.
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 sl_20170627_mercurial_on_SL6_x.nasl -t <IP/HOST>

Run the plugin with audit trail message on the console:

/opt/nessus/bin/nasl -a sl_20170627_mercurial_on_SL6_x.nasl -t <IP/HOST>

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

/opt/nessus/bin/nasl -T - sl_20170627_mercurial_on_SL6_x.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 sl_20170627_mercurial_on_SL6_x.nasl -t <IP/HOST>

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References

See also:

Similar and related Nessus plugins:

101273 - Amazon Linux AMI : mercurial (ALAS-2017-856)
101091 - CentOS 6 / 7 : mercurial (CESA-2017:1576)
101121 - Debian DLA-1005-1 : mercurial security update
102930 - Debian DSA-3963-1 : mercurial - security update
102479 - EulerOS 2.0 SP1 : mercurial (EulerOS-SA-2017-1132)
102480 - EulerOS 2.0 SP2 : mercurial (EulerOS-SA-2017-1133)
101054 - Fedora 25 : mercurial (2017-62aacc1474)
101071 - Fedora 24 : mercurial (2017-b154ff2892)
103446 - GLSA-201709-18 : Mercurial: Multiple vulnerabilities
127335 - NewStart CGSL MAIN 4.05 : mercurial Vulnerability (NS-SA-2019-0104)
100830 - openSUSE Security Update : mercurial (openSUSE-2017-689)
101076 - Oracle Linux 6 / 7 : mercurial (ELSA-2017-1576)
101077 - RHEL 6 / 7 : mercurial (RHSA-2017:1576)
101487 - Virtuozzo 6 : emacs-mercurial / emacs-mercurial-el / mercurial / etc (VZLSA-2017-1576)

Version

This page has been produced using Nessus Professional 10.1.2 (#68) LINUX, Plugin set 202205072148.
Plugin file sl_20170627_mercurial_on_SL6_x.nasl version 3.7. For more plugins, visit the Nessus Plugin Library.

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Scientific Linux Security Update : mercurial on SL6.x, SL7.x i386/x86_64 (20170627) - Nessus

Plugin Overview

Vulnerability Information

Synopsis

Description

Solution

Public Exploits

Risk Information

Plugin Source

How to Run

References

Version

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