Vulnerabilities > CVE-2019-8606 - Race Condition vulnerability in Apple mac OS X

047910
CVSS 6.9 - MEDIUM
Attack vector
LOCAL
Attack complexity
MEDIUM
Privileges required
NONE
Confidentiality impact
COMPLETE
Integrity impact
COMPLETE
Availability impact
COMPLETE
local
apple
CWE-362
nessus

Summary

A validation issue existed in the handling of symlinks. This issue was addressed with improved validation of symlinks. This issue is fixed in macOS Mojave 10.14.5. A local user may be able to load unsigned kernel extensions.

Vulnerable Configurations

Part Description Count
OS
Apple
122

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Leveraging Race Conditions
    This attack targets a race condition occurring when multiple processes access and manipulate the same resource concurrently and the outcome of the execution depends on the particular order in which the access takes place. The attacker can leverage a race condition by "running the race", modifying the resource and modifying the normal execution flow. For instance a race condition can occur while accessing a file, the attacker can trick the system by replacing the original file with his version and cause the system to read the malicious file.
  • Leveraging Time-of-Check and Time-of-Use (TOCTOU) Race Conditions
    This attack targets a race condition occurring between the time of check (state) for a resource and the time of use of a resource. The typical example is the file access. The attacker can leverage a file access race condition by "running the race", meaning that he would modify the resource between the first time the target program accesses the file and the time the target program uses the file. During that period of time, the attacker could do something such as replace the file and cause an escalation of privilege.

Nessus

  • NASL familyMacOS X Local Security Checks
    NASL idMACOSX_SECUPD2019-003.NASL
    descriptionThe remote host is running Mac OS X 10.12.6 or Mac OS X 10.13.6 and is missing a security update. It is, therefore, affected by multiple vulnerabilities : - An application may be able to read restricted memory (CVE-2019-8603, CVE-2019-8560) - An application may be able to execute arbitrary code with system privileges (CVE-2019-8635, CVE-2019-8616, CVE-2019-8629, CVE-2018-4456, CVE-2019-8604, CVE-2019-8574, CVE-2019-8569) - An application may be able to execute arbitrary code with kernel privileges (CVE-2019-8590) - Processing a maliciously crafted audio file may lead to arbitrary code execution (CVE-2019-8592) - Processing a maliciously crafted movie file may lead to arbitrary code execution (CVE-2019-8585) - A malicious application may bypass Gatekeeper checks (CVE-2019-8589) - A malicious application may be able to read restricted memory (CVE-2019-8560, CVE-2019-8598) - A user may be unexpectedly logged in to another users account (CVE-2019-8634) - A local user may be able to load unsigned kernel extensions (CVE-2019-8606) - A malicious application may be able to execute arbitrary code with system privileges (CVE-2019-8605) - A local user may be able to cause unexpected system termination or read kernel memory (CVE-2019-8576) - An application may be able to cause unexpected system termination or write kernel memory (CVE-2019-8591) - An application may be able to gain elevated privileges (CVE-2019-8577) - A maliciously crafted SQL query may lead to arbitrary code execution (CVE-2019-8600) - A malicious application may be able to elevate privileges (CVE-2019-8602) - A local user may be able to modify protected parts of the file system (CVE-2019-8568) - Processing maliciously crafted web content may lead to arbitrary code execution (CVE-2019-6237, CVE-2019-8571, CVE-2019-8583, CVE-2019-8584, CVE-2019-8586, CVE-2019-8587, CVE-2019-8594, CVE-2019-8595, CVE-2019-8596, CVE-2019-8597, CVE-2019-8601,CVE-2019-8608, CVE-2019-8609, CVE-2019-8610, CVE-2019-8611, CVE-2019-8615, CVE-2019-8619, CVE-2019-8622, CVE-2019-8623, CVE-2019-8628) - Processing maliciously crafted web content may result in the disclosure of process memory (CVE-2019-8607) Note that Nessus has not tested for this issue but has instead relied only on the operating system
    last seen2020-06-01
    modified2020-06-02
    plugin id125151
    published2019-05-15
    reporterThis script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/125151
    titlemacOS and Mac OS X Multiple Vulnerabilities (Security Update 2019-003)
    code
    #
    # (C) Tenable Network Security, Inc.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(125151);
      script_version("1.7");
      script_cvs_date("Date: 2019/12/13");
    
      script_cve_id(
        "CVE-2018-4456",
        "CVE-2019-6237",
        "CVE-2019-8560",
        "CVE-2019-8568",
        "CVE-2019-8569",
        "CVE-2019-8571",
        "CVE-2019-8574",
        "CVE-2019-8576",
        "CVE-2019-8577",
        "CVE-2019-8583",
        "CVE-2019-8584",
        "CVE-2019-8585",
        "CVE-2019-8586",
        "CVE-2019-8587",
        "CVE-2019-8589",
        "CVE-2019-8590",
        "CVE-2019-8591",
        "CVE-2019-8592",
        "CVE-2019-8594",
        "CVE-2019-8595",
        "CVE-2019-8596",
        "CVE-2019-8597",
        "CVE-2019-8598",
        "CVE-2019-8600",
        "CVE-2019-8601",
        "CVE-2019-8602",
        "CVE-2019-8603",
        "CVE-2019-8604",
        "CVE-2019-8605",
        "CVE-2019-8606",
        "CVE-2019-8607",
        "CVE-2019-8608",
        "CVE-2019-8609",
        "CVE-2019-8610",
        "CVE-2019-8611",
        "CVE-2019-8615",
        "CVE-2019-8616",
        "CVE-2019-8619",
        "CVE-2019-8622",
        "CVE-2019-8623",
        "CVE-2019-8628",
        "CVE-2019-8629",
        "CVE-2019-8634",
        "CVE-2019-8635"
      );
      script_xref(name:"APPLE-SA", value:"HT210119");
      script_xref(name:"APPLE-SA", value:"APPLE-SA-2019-05-09");
    
      script_name(english:"macOS and Mac OS X Multiple Vulnerabilities (Security Update 2019-003)");
      script_summary(english:"Checks the presence of Security Update 2019-003.");
    
      script_set_attribute(attribute:"synopsis", value:
    "The remote host is missing a macOS or Mac OS X security update that fixes multiple vulnerabilities");
      script_set_attribute(attribute:"description", value:
    "The remote host is running Mac OS X 10.12.6 or Mac OS X 10.13.6 and is missing a security update. It is, therefore,
    affected by multiple vulnerabilities :
    
      - An application may be able to read restricted memory (CVE-2019-8603, CVE-2019-8560)
    
      - An application may be able to execute arbitrary code with system privileges (CVE-2019-8635, CVE-2019-8616,
        CVE-2019-8629, CVE-2018-4456, CVE-2019-8604, CVE-2019-8574, CVE-2019-8569)
    
      - An application may be able to execute arbitrary code with kernel privileges (CVE-2019-8590)
    
      - Processing a maliciously crafted audio file may lead to arbitrary code execution (CVE-2019-8592)
    
      - Processing a maliciously crafted movie file may lead to arbitrary code execution (CVE-2019-8585)
    
      - A malicious application may bypass Gatekeeper checks (CVE-2019-8589)
    
      - A malicious application may be able to read restricted memory (CVE-2019-8560, CVE-2019-8598)
    
      - A user may be unexpectedly logged in to another users account (CVE-2019-8634)
    
      - A local user may be able to load unsigned kernel extensions (CVE-2019-8606)
    
      - A malicious application may be able to execute arbitrary code with system privileges (CVE-2019-8605)
    
      - A local user may be able to cause unexpected system termination or read kernel memory (CVE-2019-8576)
    
      - An application may be able to cause unexpected system termination or write kernel memory (CVE-2019-8591)
    
      - An application may be able to gain elevated privileges (CVE-2019-8577)
    
      - A maliciously crafted SQL query may lead to arbitrary code execution (CVE-2019-8600)
    
      - A malicious application may be able to elevate privileges (CVE-2019-8602)
    
      - A local user may be able to modify protected parts of the file system (CVE-2019-8568)
    
      - Processing maliciously crafted web content may lead to arbitrary code execution (CVE-2019-6237, CVE-2019-8571,
        CVE-2019-8583, CVE-2019-8584, CVE-2019-8586, CVE-2019-8587, CVE-2019-8594, CVE-2019-8595, CVE-2019-8596,
        CVE-2019-8597, CVE-2019-8601,CVE-2019-8608, CVE-2019-8609, CVE-2019-8610, CVE-2019-8611, CVE-2019-8615,
        CVE-2019-8619, CVE-2019-8622, CVE-2019-8623, CVE-2019-8628)
    
      - Processing maliciously crafted web content may result in the disclosure of process memory (CVE-2019-8607)
    
    Note that Nessus has not tested for this issue but has instead relied
    only on the operating system's self-reported version number.");
      script_set_attribute(attribute:"see_also", value:"https://support.apple.com/en-us/HT210119");
      script_set_attribute(attribute:"solution", value:"Install Security Update 2019-003 or later for 10.12.x or Security
    Update 2019-003 or later for 10.13.x");
      script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:C/I:C/A:C");
      script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
      script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H");
      script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
      script_set_attribute(attribute:"cvss_score_source", value:"CVE-2018-4456");
      script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
      script_set_attribute(attribute:"exploit_available", value:"true");
    
      script_set_attribute(attribute:"vuln_publication_date", value:"2019/04/03");
      script_set_attribute(attribute:"patch_publication_date", value:"2019/05/09");
      script_set_attribute(attribute:"plugin_publication_date", value:"2019/05/15");
    
      script_set_attribute(attribute:"plugin_type", value:"local");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:apple:mac_os_x");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:apple:macos");
      script_end_attributes();
    
      script_category(ACT_GATHER_INFO);
      script_family(english:"MacOS X Local Security Checks");
    
      script_copyright(english:"This script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
    
      script_dependencies("ssh_get_info.nasl");
      script_require_ports("Host/local_checks_enabled", "Host/MacOSX/Version", "Host/MacOSX/packages/boms");
    
      exit(0);
    }
    
    include("audit.inc");
    include("global_settings.inc");
    include("misc_func.inc");
    
    
    
    # Compare 2 patch numbers to determine if patch requirements are satisfied.
    # Return true if this patch or a later patch is applied
    # Return false otherwise
    function check_patch(year, number)
    {
      local_var p_split = split(patch, sep:"-");
      local_var p_year  = int( p_split[0]);
      local_var p_num   = int( p_split[1]);
    
      if (year >  p_year) return TRUE;
      else if (year <  p_year) return FALSE;
      else if (number >=  p_num) return TRUE;
      else return FALSE;
    }
    
    get_kb_item_or_exit("Host/local_checks_enabled");
    os = get_kb_item_or_exit("Host/MacOSX/Version");
    
    if (!preg(pattern:"Mac OS X 10\.1[2-3]\.", string:os))
      audit(AUDIT_OS_NOT, "Mac OS X 10.12.x / 10.13.x");
    
    patch = "2019-003";
    
    packages = get_kb_item_or_exit("Host/MacOSX/packages/boms", exit_code:1);
    sec_boms_report = pgrep(
      pattern:"^com\.apple\.pkg\.update\.(security\.|os\.SecUpd).*bom$",
      string:packages
    );
    sec_boms = split(sec_boms_report, sep:'\n');
    
    foreach package (sec_boms)
    {
      # Grab patch year and number
      matches = pregmatch(pattern:"[^0-9](20[0-9][0-9])[-.]([0-9]{3})[^0-9]", string:package);
      if (empty_or_null(matches)) continue;
      if (empty_or_null(matches[1]) || empty_or_null(matches[2]))
        continue;
    
      patch_found = check_patch(year:int(matches[1]), number:int(matches[2]));
      if (patch_found) exit(0, "The host has Security Update " + patch + " or later installed and is therefore not affected.");
    }
    
    report =  '\n  Missing security update : ' + patch;
    report += '\n  Installed security BOMs : ';
    if (sec_boms_report) report += str_replace(find:'\n', replace:'\n                            ', string:sec_boms_report);
    else report += 'n/a';
    report += '\n';
    
    security_report_v4(port:0, severity:SECURITY_HOLE, extra:report);
    
  • NASL familyMacOS X Local Security Checks
    NASL idMACOS_10_14_5.NASL
    descriptionThe remote host is running a version of macOS / Mac OS X that is 10.14.x prior to 10.14.5. It is, therefore, affected by multiple vulnerabilities : - An application may be able to read restricted memory (CVE-2019-8603, CVE-2019-8560) - An application may be able to execute arbitrary code with system privileges (CVE-2019-8635, CVE-2019-8616, CVE-2019-8629, CVE-2018-4456, CVE-2019-8604,CVE-2019-8574, CVE-2019-8569) - An application may be able to execute arbitrary code with kernel privileges (CVE-2019-8590) - Processing a maliciously crafted audio file may lead to arbitrary code execution (CVE-2019-8592) - Processing a maliciously crafted movie file may lead to arbitrary code execution (CVE-2019-8585) - A malicious application may bypass Gatekeeper checks (CVE-2019-8589) - A malicious application may be able to read restricted memory (CVE-2019-8560, CVE-2019-8598) - A user may be unexpectedly logged in to another users account (CVE-2019-8634) - A local user may be able to load unsigned kernel extensions (CVE-2019-8606) - A malicious application may be able to execute arbitrary code with system privileges (CVE-2019-8605) - A local user may be able to cause unexpected system termination or read kernel memory (CVE-2019-8576) - An application may be able to cause unexpected system termination or write kernel memory (CVE-2019-8591) - An application may be able to gain elevated privileges (CVE-2019-8577) - A maliciously crafted SQL query may lead to arbitrary code execution (CVE-2019-8600) - A malicious application may be able to elevate privileges (CVE-2019-8602) - A local user may be able to modify protected parts of the file system (CVE-2019-8568) - Processing maliciously crafted web content may lead to arbitrary code execution (CVE-2019-6237, CVE-2019-8571, CVE-2019-8583, CVE-2019-8584, CVE-2019-8586, CVE-2019-8587, CVE-2019-8594, CVE-2019-8595, CVE-2019-8596, CVE-2019-8597, CVE-2019-8601, CVE-2019-8608, CVE-2019-8609, CVE-2019-8610, CVE-2019-8611, CVE-2019-8615, CVE-2019-8619, CVE-2019-8622, CVE-2019-8623, CVE-2019-8628) - Processing maliciously crafted web content may result in the disclosure of process memory (CVE-2019-8607) Note that Nessus has not tested for this issue but has instead relied only on the operating system
    last seen2020-06-01
    modified2020-06-02
    plugin id125150
    published2019-05-15
    reporterThis script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/125150
    titlemacOS 10.14.x < 10.14.5 Multiple Vulnerabilities