Vulnerabilities > CVE-2017-6802 - Out-of-bounds Read vulnerability in multiple products

047910
CVSS 7.5 - HIGH
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
NONE
Integrity impact
NONE
Availability impact
HIGH
network
low complexity
ytnef-project
debian
CWE-125
nessus
NVD
Published: 2017-03-10
Updated: 2023-11-07

Summary

An issue was discovered in ytnef before 1.9.2. There is a potential heap-based buffer over-read on incoming Compressed RTF Streams, related to DecompressRTF() in libytnef.

Vulnerable Configurations

Part Description Count
Application
Ytnef_Project
4
OS
Debian
2

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Overread Buffers
    An adversary attacks a target by providing input that causes an application to read beyond the boundary of a defined buffer. This typically occurs when a value influencing where to start or stop reading is set to reflect positions outside of the valid memory location of the buffer. This type of attack may result in exposure of sensitive information, a system crash, or arbitrary code execution.

Nessus

  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2019-7D7083B8BE.NASL
    descriptionytnef 1.9.3 release, fixing a number of security issues : - CVE-2017-9470 - CVE-2017-9471 - CVE-2017-9474 - CVE-2017-9058 - CVE-2017-12142 - CVE-2017-12141 - CVE-2017-12144 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 id125273
    published2019-05-20
    reporterThis script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/125273
    titleFedora 30 : 1:ytnef (2019-7d7083b8be)
    code
    #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Fedora Security Advisory FEDORA-2019-7d7083b8be.
#

include("compat.inc");

if (description)
{
  script_id(125273);
  script_version("1.4");
  script_cvs_date("Date: 2020/01/15");

  script_cve_id("CVE-2017-12141", "CVE-2017-12142", "CVE-2017-12144", "CVE-2017-6298", "CVE-2017-6299", "CVE-2017-6300", "CVE-2017-6301", "CVE-2017-6302", "CVE-2017-6303", "CVE-2017-6304", "CVE-2017-6305", "CVE-2017-6306", "CVE-2017-6800", "CVE-2017-6801", "CVE-2017-6802", "CVE-2017-9058", "CVE-2017-9146", "CVE-2017-9470", "CVE-2017-9471", "CVE-2017-9472", "CVE-2017-9473", "CVE-2017-9474");
  script_xref(name:"FEDORA", value:"2019-7d7083b8be");

  script_name(english:"Fedora 30 : 1:ytnef (2019-7d7083b8be)");
  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:
"ytnef 1.9.3 release, fixing a number of security issues :

  - CVE-2017-9470

  - CVE-2017-9471

  - CVE-2017-9474

  - CVE-2017-9058

  - CVE-2017-12142

  - CVE-2017-12141

  - CVE-2017-12144

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."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bodhi.fedoraproject.org/updates/FEDORA-2019-7d7083b8be"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected 1:ytnef package."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  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:N/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:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fedoraproject:fedora:1:ytnef");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:30");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/02/24");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/05/18");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/05/20");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2019-2020 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:"^30([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Fedora 30", "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:"FC30", reference:"ytnef-1.9.3-1.fc30", epoch:"1")) 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, "1:ytnef");
}
  • NASL familyUbuntu Local Security Checks
    NASL idUBUNTU_USN-3288-1.NASL
    descriptionIt was discovered that libytnef incorrectly handled malformed TNEF streams. If a user were tricked into opening a specially crafted TNEF attachment, an attacker could cause a denial of service or possibly 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 id100219
    published2017-05-16
    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/100219
    titleUbuntu 14.04 LTS : libytnef vulnerabilities (USN-3288-1)
    code
    #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-3288-1. 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(100219);
  script_version("3.7");
  script_cvs_date("Date: 2019/09/18 12:31:47");

  script_cve_id("CVE-2017-6298", "CVE-2017-6299", "CVE-2017-6300", "CVE-2017-6301", "CVE-2017-6302", "CVE-2017-6303", "CVE-2017-6304", "CVE-2017-6305", "CVE-2017-6306", "CVE-2017-6800", "CVE-2017-6801", "CVE-2017-6802");
  script_xref(name:"USN", value:"3288-1");

  script_name(english:"Ubuntu 14.04 LTS : libytnef vulnerabilities (USN-3288-1)");
  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:
"It was discovered that libytnef incorrectly handled malformed TNEF
streams. If a user were tricked into opening a specially crafted TNEF
attachment, an attacker could cause a denial of service or possibly
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."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://usn.ubuntu.com/3288-1/"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected libytnef0 package."
  );
  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:U/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: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:libytnef0");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:14.04");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/02/24");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/05/15");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/05/16");
  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:"^(14\.04)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 14.04", "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:"14.04", pkgname:"libytnef0", pkgver:"1.5-6ubuntu0.1")) flag++;

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    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, "libytnef0");
}
  • NASL familyDebian Local Security Checks
    NASL idDEBIAN_DLA-878.NASL
    descriptionCVE-2017-6298 NULL pointer Deref / calloc return value not checked CVE-2017-6299 Infinite Loop / DoS in the TNEFFillMapi function in lib/ytnef.c CVE-2017-6300 Buffer Overflow in version field in lib/tnef-types.h CVE-2017-6301 Out of Bounds Reads CVE-2017-6302 Integer Overflow CVE-2017-6303 Invalid Write and Integer Overflow CVE-2017-6304 Out of Bounds read CVE-2017-6305 Out of Bounds read and write CVE-2017-6801 Out-of-bounds access with fields of Size 0 in TNEFParse() in libytnef CVE-2017-6802 Heap-based buffer over-read on incoming Compressed RTF Streams, related to DecompressRTF() in libytnef For Debian 7
    last seen2020-03-17
    modified2017-03-30
    plugin id99044
    published2017-03-30
    reporterThis script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/99044
    titleDebian DLA-878-1 : libytnef security update
    code
    #%NASL_MIN_LEVEL 80502
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory DLA-878-1. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include("compat.inc");

if (description)
{
  script_id(99044);
  script_version("3.5");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/03/12");

  script_cve_id("CVE-2017-6298", "CVE-2017-6299", "CVE-2017-6300", "CVE-2017-6301", "CVE-2017-6302", "CVE-2017-6303", "CVE-2017-6304", "CVE-2017-6305", "CVE-2017-6801", "CVE-2017-6802");

  script_name(english:"Debian DLA-878-1 : libytnef security update");
  script_summary(english:"Checks dpkg output for the updated packages.");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Debian host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"CVE-2017-6298 NULL pointer Deref / calloc return value not checked

CVE-2017-6299 Infinite Loop / DoS in the TNEFFillMapi function in
lib/ytnef.c

CVE-2017-6300 Buffer Overflow in version field in lib/tnef-types.h

CVE-2017-6301 Out of Bounds Reads

CVE-2017-6302 Integer Overflow

CVE-2017-6303 Invalid Write and Integer Overflow

CVE-2017-6304 Out of Bounds read

CVE-2017-6305 Out of Bounds read and write

CVE-2017-6801 Out-of-bounds access with fields of Size 0 in
TNEFParse() in libytnef

CVE-2017-6802 Heap-based buffer over-read on incoming Compressed RTF
Streams, related to DecompressRTF() in libytnef

For Debian 7 'Wheezy', these problems have been fixed in version
1.5-4+deb7u1.

We recommend that you upgrade your libytnef packages.

NOTE: Tenable Network Security has extracted the preceding description
block directly from the DLA 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://lists.debian.org/debian-lts-announce/2017/03/msg00036.html"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/wheezy/libytnef"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Upgrade the affected libytnef0, and libytnef0-dev packages."
  );
  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:U/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: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:debian:debian_linux:libytnef0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libytnef0-dev");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:7.0");

  script_set_attribute(attribute:"patch_publication_date", value:"2017/03/28");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/03/30");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Debian Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Debian/release", "Host/Debian/dpkg-l");

  exit(0);
}


include("audit.inc");
include("debian_package.inc");


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Debian/release")) audit(AUDIT_OS_NOT, "Debian");
if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;
if (deb_check(release:"7.0", prefix:"libytnef0", reference:"1.5-4+deb7u1")) flag++;
if (deb_check(release:"7.0", prefix:"libytnef0-dev", reference:"1.5-4+deb7u1")) flag++;

if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:deb_report_get());
  else security_warning(0);
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");
  • NASL familyDebian Local Security Checks
    NASL idDEBIAN_DSA-3846.NASL
    descriptionSeveral issues were discovered in libytnef, a library used to decode application/ms-tnef e-mail attachments. Multiple heap overflows, out-of-bound writes and reads, NULL pointer dereferences and infinite loops could be exploited by tricking a user into opening a maliciously crafted winmail.dat file.
    last seen2020-06-01
    modified2020-06-02
    plugin id100070
    published2017-05-10
    reporterThis script is Copyright (C) 2017-2018 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/100070
    titleDebian DSA-3846-1 : libytnef - security update
    code
    #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Debian Security Advisory DSA-3846. The text 
# itself is copyright (C) Software in the Public Interest, Inc.
#

include("compat.inc");

if (description)
{
  script_id(100070);
  script_version("3.6");
  script_cvs_date("Date: 2018/11/10 11:49:38");

  script_cve_id("CVE-2017-6298", "CVE-2017-6299", "CVE-2017-6300", "CVE-2017-6301", "CVE-2017-6302", "CVE-2017-6303", "CVE-2017-6304", "CVE-2017-6305", "CVE-2017-6306", "CVE-2017-6800", "CVE-2017-6801", "CVE-2017-6802");
  script_xref(name:"DSA", value:"3846");

  script_name(english:"Debian DSA-3846-1 : libytnef - security update");
  script_summary(english:"Checks dpkg output for the updated package");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Debian host is missing a security-related update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"Several issues were discovered in libytnef, a library used to decode
application/ms-tnef e-mail attachments. Multiple heap overflows,
out-of-bound writes and reads, NULL pointer dereferences and infinite
loops could be exploited by tricking a user into opening a maliciously
crafted winmail.dat file."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/jessie/libytnef"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.debian.org/security/2017/dsa-3846"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"Upgrade the libytnef packages.

For the stable distribution (jessie), these problems have been fixed
in version 1.5-6+deb8u1.

For the upcoming stable (stretch) and unstable (sid) distributions,
these problems have been fixed in version 1.9.2-1."
  );
  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:U/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: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:debian:debian_linux:libytnef");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:8.0");

  script_set_attribute(attribute:"patch_publication_date", value:"2017/05/09");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/05/10");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2017-2018 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Debian Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Debian/release", "Host/Debian/dpkg-l");

  exit(0);
}


include("audit.inc");
include("debian_package.inc");


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Debian/release")) audit(AUDIT_OS_NOT, "Debian");
if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;
if (deb_check(release:"8.0", prefix:"libytnef0", reference:"1.5-6+deb8u1")) flag++;
if (deb_check(release:"8.0", prefix:"libytnef0-dev", reference:"1.5-6+deb8u1")) flag++;

if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:deb_report_get());
  else security_warning(0);
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");

References