Vulnerabilities > CVE-2016-4738 - Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in multiple products

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
debian
CWE-119
nessus

Summary

libxslt in Apple iOS before 10, OS X before 10.12, tvOS before 10, and watchOS before 3 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted web site.

Vulnerable Configurations

Part Description Count
OS
Apple
321
OS
Debian
2

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.

Nessus

  • NASL familyUbuntu Local Security Checks
    NASL idUBUNTU_USN-3271-1.NASL
    descriptionHolger Fuhrmannek discovered an integer overflow in the xsltAddTextString() function in Libxslt. An attacker could use this to craft a malicious document that, when opened, could cause a denial of service (application crash) or possible execute arbitrary code. (CVE-2017-5029) Nicolas Gregoire discovered that Libxslt mishandled namespace nodes. An attacker could use this to craft a malicious document that, when opened, could cause a denial of service (application crash) or possibly execute arbtrary code. This issue only affected Ubuntu 16.04 LTS, Ubuntu 14.04 LTS, and Ubuntu 12.04 LTS. (CVE-2016-1683) Sebastian Apelt discovered that a use-after-error existed in the xsltDocumentFunctionLoadDocument() function in Libxslt. An attacker could use this to craft a malicious document that, when opened, could cause a denial of service (application crash) or possibly execute arbitrary code. This issue only affected Ubuntu 16.04 LTS, Ubuntu 14.04 LTS, and Ubuntu 12.04 LTS. (CVE-2016-1841) It was discovered that a type confusion error existed in the xsltStylePreCompute() function in Libxslt. An attacker could use this to craft a malicious XML file that, when opened, caused a denial of service (application crash). This issue only affected Ubuntu 14.04 LTS and Ubuntu 12.04 LTS. (CVE-2015-7995) Nicolas Gregoire discovered the Libxslt mishandled the
    last seen2020-06-01
    modified2020-06-02
    plugin id99725
    published2017-04-28
    reporterUbuntu Security Notice (C) 2017-2019 Canonical, Inc. / NASL script (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/99725
    titleUbuntu 12.04 LTS / 14.04 LTS / 16.04 LTS / 16.10 / 17.04 : libxslt vulnerabilities (USN-3271-1)
    code
    #
    # (C) Tenable Network Security, Inc.
    #
    # The descriptive text and package checks in this plugin were
    # extracted from Ubuntu Security Notice USN-3271-1. The text 
    # itself is copyright (C) Canonical, Inc. See 
    # <http://www.ubuntu.com/usn/>. Ubuntu(R) is a registered 
    # trademark of Canonical, Inc.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(99725);
      script_version("3.6");
      script_cvs_date("Date: 2019/09/18 12:31:47");
    
      script_cve_id("CVE-2015-7995", "CVE-2016-1683", "CVE-2016-1684", "CVE-2016-1841", "CVE-2016-4738", "CVE-2017-5029");
      script_xref(name:"USN", value:"3271-1");
    
      script_name(english:"Ubuntu 12.04 LTS / 14.04 LTS / 16.04 LTS / 16.10 / 17.04 : libxslt vulnerabilities (USN-3271-1)");
      script_summary(english:"Checks dpkg output for updated package.");
    
      script_set_attribute(
        attribute:"synopsis", 
        value:"The remote Ubuntu host is missing a security-related patch."
      );
      script_set_attribute(
        attribute:"description", 
        value:
    "Holger Fuhrmannek discovered an integer overflow in the
    xsltAddTextString() function in Libxslt. An attacker could use this to
    craft a malicious document that, when opened, could cause a denial of
    service (application crash) or possible execute arbitrary code.
    (CVE-2017-5029)
    
    Nicolas Gregoire discovered that Libxslt mishandled namespace nodes.
    An attacker could use this to craft a malicious document that, when
    opened, could cause a denial of service (application crash) or
    possibly execute arbtrary code. This issue only affected Ubuntu 16.04
    LTS, Ubuntu 14.04 LTS, and Ubuntu 12.04 LTS. (CVE-2016-1683)
    
    Sebastian Apelt discovered that a use-after-error existed in the
    xsltDocumentFunctionLoadDocument() function in Libxslt. An attacker
    could use this to craft a malicious document that, when opened, could
    cause a denial of service (application crash) or possibly execute
    arbitrary code. This issue only affected Ubuntu 16.04 LTS, Ubuntu
    14.04 LTS, and Ubuntu 12.04 LTS. (CVE-2016-1841)
    
    It was discovered that a type confusion error existed in the
    xsltStylePreCompute() function in Libxslt. An attacker could use this
    to craft a malicious XML file that, when opened, caused a denial of
    service (application crash). This issue only affected Ubuntu 14.04 LTS
    and Ubuntu 12.04 LTS. (CVE-2015-7995)
    
    Nicolas Gregoire discovered the Libxslt mishandled the 'i' and 'a'
    format tokens for xsl:number data. An attacker could use this to craft
    a malicious document that, when opened, could cause a denial of
    service (application crash). This issue only affected Ubuntu 16.04
    LTS, Ubuntu 14.04 LTS, and Ubuntu 12.04 LTS. (CVE-2016-1684)
    
    It was discovered that the xsltFormatNumberConversion() function in
    Libxslt did not properly handle empty decimal separators. An attacker
    could use this to craft a malicious document that, when opened, could
    cause a denial of service (application crash). This issue only
    affected Ubuntu 16.10, Ubuntu 16.04 LTS, Ubuntu 14.04 LTS, and Ubuntu
    12.04 LTS. (CVE-2016-4738).
    
    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."
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://usn.ubuntu.com/3271-1/"
      );
      script_set_attribute(
        attribute:"solution", 
        value:"Update the affected libxslt1.1 package."
      );
      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:U/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:U/RL:O/RC:C");
      script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
      script_set_attribute(attribute:"exploit_available", value:"false");
    
      script_set_attribute(attribute:"plugin_type", value:"local");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libxslt1.1");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:12.04:-:lts");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:14.04");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.04");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.10");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:17.04");
    
      script_set_attribute(attribute:"vuln_publication_date", value:"2015/11/17");
      script_set_attribute(attribute:"patch_publication_date", value:"2017/04/27");
      script_set_attribute(attribute:"plugin_publication_date", value:"2017/04/28");
      script_set_attribute(attribute:"generated_plugin", value:"current");
      script_end_attributes();
    
      script_category(ACT_GATHER_INFO);
      script_copyright(english:"Ubuntu Security Notice (C) 2017-2019 Canonical, Inc. / NASL script (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
      script_family(english:"Ubuntu Local Security Checks");
    
      script_dependencies("ssh_get_info.nasl");
      script_require_keys("Host/cpu", "Host/Ubuntu", "Host/Ubuntu/release", "Host/Debian/dpkg-l");
    
      exit(0);
    }
    
    
    include("audit.inc");
    include("ubuntu.inc");
    include("misc_func.inc");
    
    if ( ! get_kb_item("Host/local_checks_enabled") ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
    release = get_kb_item("Host/Ubuntu/release");
    if ( isnull(release) ) audit(AUDIT_OS_NOT, "Ubuntu");
    release = chomp(release);
    if (! preg(pattern:"^(12\.04|14\.04|16\.04|16\.10|17\.04)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 12.04 / 14.04 / 16.04 / 16.10 / 17.04", "Ubuntu " + release);
    if ( ! get_kb_item("Host/Debian/dpkg-l") ) 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, "Ubuntu", cpu);
    
    flag = 0;
    
    if (ubuntu_check(osver:"12.04", pkgname:"libxslt1.1", pkgver:"1.1.26-8ubuntu1.4")) flag++;
    if (ubuntu_check(osver:"14.04", pkgname:"libxslt1.1", pkgver:"1.1.28-2ubuntu0.1")) flag++;
    if (ubuntu_check(osver:"16.04", pkgname:"libxslt1.1", pkgver:"1.1.28-2.1ubuntu0.1")) flag++;
    if (ubuntu_check(osver:"16.10", pkgname:"libxslt1.1", pkgver:"1.1.29-1ubuntu0.1")) flag++;
    if (ubuntu_check(osver:"17.04", pkgname:"libxslt1.1", pkgver:"1.1.29-2ubuntu0.1")) flag++;
    
    if (flag)
    {
      security_report_v4(
        port       : 0,
        severity   : SECURITY_HOLE,
        extra      : ubuntu_report_get()
      );
      exit(0);
    }
    else
    {
      tested = ubuntu_pkg_tests_get();
      if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
      else audit(AUDIT_PACKAGE_NOT_INSTALLED, "libxslt1.1");
    }
    
  • NASL familySuSE Local Security Checks
    NASL idSUSE_SU-2017-1282-1.NASL
    descriptionThis update for libxslt fixes the following issues : - CVE-2017-5029: The xsltAddTextString function in transform.c lacked a check for integer overflow during a size calculation, which allowed a remote attacker to perform an out of bounds memory write via a crafted HTML page (bsc#1035905). - CVE-2016-4738: Fix heap overread in xsltFormatNumberConversion: An empty decimal-separator could cause a heap overread. This can be exploited to leak a couple of bytes after the buffer that holds the pattern string (bsc#1005591). - CVE-2015-9019: Properly initialize random generator (bsc#934119). - CVE-2015-7995: Vulnerability in function xsltStylePreCompute
    last seen2020-06-01
    modified2020-06-02
    plugin id100208
    published2017-05-16
    reporterThis script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/100208
    titleSUSE SLES11 Security Update : libxslt (SUSE-SU-2017:1282-1)
  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2019-320D5295FC.NASL
    descriptionUpdate to 1.1.33 Fix CVE-2016-1841, CVE-2016-4607, CVE-2016-4608, CVE-2016-4610, CVE-2016-4609, CVE-2019-11068, CVE-2016-1684, CVE-2016-1683, CVE-2016-4738. 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 seen2020-06-01
    modified2020-06-02
    plugin id126015
    published2019-06-19
    reporterThis script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/126015
    titleFedora 30 : mingw-libxslt (2019-320d5295fc)
  • NASL familyDebian Local Security Checks
    NASL idDEBIAN_DLA-700.NASL
    descriptionA heap overread bug was found in libxslt, which can cause arbitrary code execution or denial of service. For Debian 7
    last seen2020-03-17
    modified2016-11-07
    plugin id94583
    published2016-11-07
    reporterThis script is Copyright (C) 2016-2020 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/94583
    titleDebian DLA-700-1 : libxslt security update
  • NASL familySuSE Local Security Checks
    NASL idOPENSUSE-2017-609.NASL
    descriptionThis update for libxslt fixes the following security issues : - CVE-2017-5029: The xsltAddTextString function in transform.c lacked a check for integer overflow during a size calculation, which allowed a remote attacker to perform an out of bounds memory write via a crafted HTML page (bsc#1035905). - CVE-2016-4738: Fix heap overread in xsltFormatNumberConversion: An empty decimal-separator could cause a heap overread. This can be exploited to leak a couple of bytes after the buffer that holds the pattern string (bsc#1005591). - CVE-2015-9019: Properly initialize random generator (bsc#934119). - CVE-2015-7995: Vulnerability in function xsltStylePreCompute
    last seen2020-06-05
    modified2017-05-24
    plugin id100367
    published2017-05-24
    reporterThis script is Copyright (C) 2017-2020 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/100367
    titleopenSUSE Security Update : libxslt (openSUSE-2017-609)
  • NASL familyMacOS X Local Security Checks
    NASL idMACOS_10_12.NASL
    descriptionThe remote host is running a version of Mac OS X that is prior to 10.10.5, 10.11.x prior to 10.11.6, or is not macOS 10.12. It is, therefore, affected by multiple vulnerabilities in the following components : - apache - apache_mod_php - Apple HSSPI Support - AppleEFIRuntime - AppleMobileFileIntegrity - AppleUCC - Application Firewall - ATS - Audio - Bluetooth - cd9660 - CFNetwork - CommonCrypto - CoreCrypto - CoreDisplay - curl - Date & Time Pref Pane - DiskArbitration - File Bookmark - FontParser - IDS - Connectivity - ImageIO - Intel Graphics Driver - IOAcceleratorFamily - IOThunderboltFamily - Kerberos v5 PAM module - Kernel - libarchive - libxml2 - libxpc - libxslt - mDNSResponder - NSSecureTextField - Perl - S2 Camera - Security - Terminal - WindowServer Note that successful exploitation of the most serious issues can result in arbitrary code execution.
    last seen2020-06-01
    modified2020-06-02
    plugin id93685
    published2016-09-23
    reporterThis script is Copyright (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/93685
    titlemacOS < 10.12 Multiple Vulnerabilities
  • NASL familyDebian Local Security Checks
    NASL idDEBIAN_DSA-3709.NASL
    descriptionNick Wellnhofer discovered that the xsltFormatNumberConversion function in libxslt, an XSLT processing runtime library, does not properly check for a zero byte terminating the pattern string. This flaw can be exploited to leak a couple of bytes after the buffer that holds the pattern string.
    last seen2020-06-01
    modified2020-06-02
    plugin id94645
    published2016-11-09
    reporterThis script is Copyright (C) 2016-2018 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/94645
    titleDebian DSA-3709-1 : libxslt - security update
  • NASL familyFreeBSD Local Security Checks
    NASL idFREEBSD_PKG_6A177C87993311E793F7D43D7E971A1B.NASL
    descriptionGitLab reports : Please reference CVE/URL list for details
    last seen2020-06-01
    modified2020-06-02
    plugin id103237
    published2017-09-15
    reporterThis script is Copyright (C) 2017-2018 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/103237
    titleFreeBSD : GitLab -- multiple vulnerabilities (6a177c87-9933-11e7-93f7-d43d7e971a1b)
  • NASL familySuSE Local Security Checks
    NASL idSUSE_SU-2017-1313-1.NASL
    descriptionThis update for libxslt fixes the following issues : - CVE-2017-5029: The xsltAddTextString function in transform.c lacked a check for integer overflow during a size calculation, which allowed a remote attacker to perform an out of bounds memory write via a crafted HTML page (bsc#1035905). - CVE-2016-4738: Fix heap overread in xsltFormatNumberConversion: An empty decimal-separator could cause a heap overread. This can be exploited to leak a couple of bytes after the buffer that holds the pattern string (bsc#1005591). - CVE-2015-9019: Properly initialize random generator (bsc#934119). - CVE-2015-7995: Vulnerability in function xsltStylePreCompute
    last seen2020-06-01
    modified2020-06-02
    plugin id100243
    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/100243
    titleSUSE SLED12 / SLES12 Security Update : libxslt (SUSE-SU-2017:1313-1)
  • NASL familyGentoo Local Security Checks
    NASL idGENTOO_GLSA-201804-01.NASL
    descriptionThe remote host is affected by the vulnerability described in GLSA-201804-01 (libxslt: Multiple vulnerabilities) Multiple vulnerabilities have been discovered in libxslt. Please review the CVE identifiers referenced below for details. Impact : A remote attacker, via a crafted HTML page, could possibly execute arbitrary code, cause a Denial of Service condition or leak information. Workaround : There is no known workaround at this time.
    last seen2020-06-01
    modified2020-06-02
    plugin id108821
    published2018-04-04
    reporterThis script is Copyright (C) 2018 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/108821
    titleGLSA-201804-01 : libxslt: Multiple vulnerabilities
  • NASL familyMisc.
    NASL idAPPLETV_10.NASL
    descriptionAccording to its banner, the version of Apple TV on the remote device is prior to 10. It is, therefore, affected by multiple vulnerabilities in the following components : - Audio - CFNetwork - CoreCrypto - FontParser - IOAcceleratorFamily - Kernel - libxml2 - libxslt - Security - WebKit Note that only 4th generation models are affected by these vulnerabilities.
    last seen2020-06-01
    modified2020-06-02
    plugin id93776
    published2016-09-28
    reporterThis script is Copyright (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/93776
    titleApple TV < 10 Multiple Vulnerabilities