Vulnerabilities > CVE-2017-17512 - Injection vulnerability in Sensible-Utils Project Sensible-Utils

047910
CVSS 8.8 - HIGH
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
HIGH
Integrity impact
HIGH
Availability impact
HIGH
network
low complexity
sensible-utils-project
CWE-74
nessus

Summary

sensible-browser in sensible-utils before 0.0.11 does not validate strings before launching the program specified by the BROWSER environment variable, which allows remote attackers to conduct argument-injection attacks via a crafted URL, as demonstrated by a --proxy-pac-file argument.

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.
  • Server Side Include (SSI) Injection
    An attacker can use Server Side Include (SSI) Injection to send code to a web application that then gets executed by the web server. Doing so enables the attacker to achieve similar results to Cross Site Scripting, viz., arbitrary code execution and information disclosure, albeit on a more limited scale, since the SSI directives are nowhere near as powerful as a full-fledged scripting language. Nonetheless, the attacker can conveniently gain access to sensitive files, such as password files, and execute shell commands.
  • Cross Site Scripting through Log Files
    An attacker may leverage a system weakness where logs are susceptible to log injection to insert scripts into the system's logs. If these logs are later viewed by an administrator through a thin administrative interface and the log data is not properly HTML encoded before being written to the page, the attackers' scripts stored in the log will be executed in the administrative interface with potentially serious consequences. This attack pattern is really a combination of two other attack patterns: log injection and stored cross site scripting.
  • Command Line Execution through SQL Injection
    An attacker uses standard SQL injection methods to inject data into the command line for execution. This could be done directly through misuse of directives such as MSSQL_xp_cmdshell or indirectly through injection of data into the database that would be interpreted as shell commands. Sometime later, an unscrupulous backend application (or could be part of the functionality of the same application) fetches the injected data stored in the database and uses this data as command line arguments without performing proper validation. The malicious data escapes that data plane by spawning new commands to be executed on the host.
  • Subverting Environment Variable Values
    The attacker directly or indirectly modifies environment variables used by or controlling the target software. The attacker's goal is to cause the target software to deviate from its expected operation in a manner that benefits the attacker.

Nessus

  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2017-2FAB3F12C4.NASL
    descriptionUpdate to version 0.0.11, see http://metadata.ftp-master.debian.org/changelogs/main/s/sensible-utils /sensible-utils_0.0.11_changelog for details. 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.
    last seen2020-06-05
    modified2018-01-15
    plugin id105847
    published2018-01-15
    reporterThis script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/105847
    titleFedora 27 : sensible-utils (2017-2fab3f12c4)
    code
    #%NASL_MIN_LEVEL 80502
    #
    # (C) Tenable Network Security, Inc.
    #
    # The descriptive text and package checks in this plugin were  
    # extracted from Fedora Security Advisory FEDORA-2017-2fab3f12c4.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(105847);
      script_version("3.4");
      script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/04");
    
      script_cve_id("CVE-2017-17512");
      script_xref(name:"FEDORA", value:"2017-2fab3f12c4");
    
      script_name(english:"Fedora 27 : sensible-utils (2017-2fab3f12c4)");
      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:
    "Update to version 0.0.11, see
    http://metadata.ftp-master.debian.org/changelogs/main/s/sensible-utils
    /sensible-utils_0.0.11_changelog for details.
    
    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."
      );
      # http://metadata.ftp-master.debian.org/changelogs/main/s/sensible-utils/sensible-utils_0.0.11_changelog
      script_set_attribute(
        attribute:"see_also",
        value:"http://www.nessus.org/u?e16aa490"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://bodhi.fedoraproject.org/updates/FEDORA-2017-2fab3f12c4"
      );
      script_set_attribute(
        attribute:"solution", 
        value:"Update the affected sensible-utils package."
      );
      script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P");
      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_attribute(attribute:"plugin_type", value:"local");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fedoraproject:fedora:sensible-utils");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:27");
    
      script_set_attribute(attribute:"vuln_publication_date", value:"2017/12/11");
      script_set_attribute(attribute:"patch_publication_date", value:"2017/12/28");
      script_set_attribute(attribute:"plugin_publication_date", value:"2018/01/15");
      script_set_attribute(attribute:"generated_plugin", value:"current");
      script_end_attributes();
    
      script_category(ACT_GATHER_INFO);
      script_copyright(english:"This script is Copyright (C) 2018-2020 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:"^27([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Fedora 27", "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:"FC27", reference:"sensible-utils-0.0.11-1.fc27")) 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, "sensible-utils");
    }
    
  • NASL familyUbuntu Local Security Checks
    NASL idUBUNTU_USN-3584-1.NASL
    descriptionGabriel Corona discovered that sensible-utils incorrectly validated strings when launcher a browser with the sensible-browser tool. A remote attacker could possibly use this issue with a specially crafted URL to conduct an argument injection attack and execute arbitrary code. Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-06-01
    modified2020-06-02
    plugin id107023
    published2018-02-27
    reporterUbuntu Security Notice (C) 2018-2019 Canonical, Inc. / NASL script (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/107023
    titleUbuntu 14.04 LTS / 16.04 LTS / 17.10 : sensible-utils vulnerability (USN-3584-1)
  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2017-80C6B4D3BE.NASL
    descriptionUpdate to version 0.0.11, see http://metadata.ftp-master.debian.org/changelogs/main/s/sensible-utils /sensible-utils_0.0.11_changelog for details. 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.
    last seen2020-06-05
    modified2017-12-28
    plugin id105475
    published2017-12-28
    reporterThis script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/105475
    titleFedora 26 : sensible-utils (2017-80c6b4d3be)
  • NASL familyDebian Local Security Checks
    NASL idDEBIAN_DLA-1209.NASL
    descriptionIt was discovered that there was a vulnerability in sensible-browser, a utility to start the most suitable web browser based on your environment or configuration. Remote attackers could conduct argument-injection attacks via specially- crafted URIs. For Debian 7
    last seen2020-03-17
    modified2017-12-18
    plugin id105327
    published2017-12-18
    reporterThis script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/105327
    titleDebian DLA-1209-1 : sensible-utils security update
  • NASL familyDebian Local Security Checks
    NASL idDEBIAN_DSA-4071.NASL
    descriptionGabriel Corona reported that sensible-browser from sensible-utils, a collection of small utilities used to sensibly select and spawn an appropriate browser, editor or pager, does not validate strings before launching the program specified by the BROWSER environment variable, potentially allowing a remote attacker to conduct argument-injection attacks if a user is tricked into processing a specially crafted URL.
    last seen2020-06-01
    modified2020-06-02
    plugin id105431
    published2017-12-26
    reporterThis script is Copyright (C) 2017-2018 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/105431
    titleDebian DSA-4071-1 : sensible-utils - security update