Vulnerabilities > CVE-2007-5395 - Improper Restriction of Operations Within the Bounds of A Memory Buffer vulnerability in multiple products

047910
CVSS 10.0 - CRITICAL
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
COMPLETE
Integrity impact
COMPLETE
Availability impact
COMPLETE
network
low complexity
link-grammar
abiword
CWE-119
critical
nessus
NVD
Published: 2007-11-08
Updated: 2018-10-15

Summary

Stack-based buffer overflow in the separate_word function in tokenize.c in Link Grammar 4.1b and possibly other versions, as used in AbiWord Link Grammar 4.2.4, allows remote attackers to execute arbitrary code via a long word, as reachable through the separate_sentence function.

Vulnerable Configurations

Part Description Count
Application
Link_Grammar
1
Application
Abiword
1

Common Weakness Enumeration (CWE)

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 familyDebian Local Security Checks
    NASL idDEBIAN_DSA-1432.NASL
    descriptionAlin Rad Pop discovered that link-grammar, Carnegie Mellon University
    last seen2020-06-01
    modified2020-06-02
    plugin id29705
    published2007-12-17
    reporterThis script is Copyright (C) 2007-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/29705
    titleDebian DSA-1432-1 : link-grammar - buffer overflow
    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 DSA-1432. The text 
# itself is copyright (C) Software in the Public Interest, Inc.
#

include("compat.inc");

if (description)
{
  script_id(29705);
  script_version("1.14");
  script_cvs_date("Date: 2019/08/02 13:32:20");

  script_cve_id("CVE-2007-5395");
  script_xref(name:"DSA", value:"1432");

  script_name(english:"Debian DSA-1432-1 : link-grammar - buffer overflow");
  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:
"Alin Rad Pop discovered that link-grammar, Carnegie Mellon
University's link grammar parser for English, performed insufficient
validation within its tokenizer, which could allow a malicious input
file to execute arbitrary code."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=450695"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.debian.org/security/2007/dsa-1432"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"Upgrade the link-grammar package.

For the old stable distribution (sarge), this package is not present.

For the stable distribution (etch), this problem has been fixed in
version 4.2.2-4etch1."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
  script_cwe_id(119);

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:link-grammar");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:4.0");

  script_set_attribute(attribute:"patch_publication_date", value:"2007/12/16");
  script_set_attribute(attribute:"plugin_publication_date", value:"2007/12/17");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2007-2019 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:"4.0", prefix:"liblink-grammar4", reference:"4.2.2-4etch1")) flag++;
if (deb_check(release:"4.0", prefix:"liblink-grammar4-dev", reference:"4.2.2-4etch1")) flag++;
if (deb_check(release:"4.0", prefix:"link-grammar", reference:"4.2.2-4etch1")) flag++;
if (deb_check(release:"4.0", prefix:"link-grammar-dictionaries-en", reference:"4.2.2-4etch1")) flag++;

if (flag)
{
  if (report_verbosity > 0) security_hole(port:0, extra:deb_report_get());
  else security_hole(0);
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");
  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2007-3339.NASL
    descriptionCVE-2007-5395 is fixed in this release Note that Tenable Network Security has extracted the preceding description block directly from the Fedora 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 id28214
    published2007-11-15
    reporterThis script is Copyright (C) 2007-2019 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/28214
    titleFedora 7 : link-grammar-4.2.5-1.fc7 (2007-3339)
    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 2007-3339.
#

include("compat.inc");

if (description)
{
  script_id(28214);
  script_version ("1.13");
  script_cvs_date("Date: 2019/08/02 13:32:25");

  script_cve_id("CVE-2007-5395");
  script_xref(name:"FEDORA", value:"2007-3339");

  script_name(english:"Fedora 7 : link-grammar-4.2.5-1.fc7 (2007-3339)");
  script_summary(english:"Checks rpm output for the updated packages.");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Fedora host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"CVE-2007-5395 is fixed in this release

Note that Tenable Network Security has extracted the preceding
description block directly from the Fedora 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://bugzilla.redhat.com/show_bug.cgi?id=371221"
  );
  # https://lists.fedoraproject.org/pipermail/package-announce/2007-November/004815.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?3b0cd9f1"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"Update the affected link-grammar, link-grammar-debuginfo and / or
link-grammar-devel packages."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
  script_cwe_id(119);

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fedoraproject:fedora:link-grammar");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fedoraproject:fedora:link-grammar-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fedoraproject:fedora:link-grammar-devel");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:7");

  script_set_attribute(attribute:"patch_publication_date", value:"2007/11/15");
  script_set_attribute(attribute:"plugin_publication_date", value:"2007/11/15");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2007-2019 Tenable Network Security, Inc.");
  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 = eregmatch(pattern: "Fedora.*release ([0-9]+)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Fedora");
os_ver = os_ver[1];
if (! ereg(pattern:"^7([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Fedora 7.x", "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:"FC7", reference:"link-grammar-4.2.5-1.fc7")) flag++;
if (rpm_check(release:"FC7", reference:"link-grammar-debuginfo-4.2.5-1.fc7")) flag++;
if (rpm_check(release:"FC7", reference:"link-grammar-devel-4.2.5-1.fc7")) flag++;


if (flag)
{
  if (report_verbosity > 0) security_hole(port:0, extra:rpm_report_get());
  else security_hole(0);
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "link-grammar / link-grammar-debuginfo / link-grammar-devel");
}
  • NASL familyUbuntu Local Security Checks
    NASL idUBUNTU_USN-545-1.NASL
    descriptionAlin Rad Pop discovered that AbiWord
    last seen2020-06-01
    modified2020-06-02
    plugin id28357
    published2007-11-29
    reporterUbuntu Security Notice (C) 2007-2019 Canonical, Inc. / NASL script (C) 2018 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/28357
    titleUbuntu 7.10 : link-grammar vulnerability (USN-545-1)
    code
    #%NASL_MIN_LEVEL 80502
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-545-1. 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(28357);
  script_version("1.14");
  script_cvs_date("Date: 2019/08/02 13:33:01");

  script_cve_id("CVE-2007-5395");
  script_xref(name:"USN", value:"545-1");

  script_name(english:"Ubuntu 7.10 : link-grammar vulnerability (USN-545-1)");
  script_summary(english:"Checks dpkg output for updated packages.");

  script_set_attribute(
    attribute:"synopsis", 
    value:
"The remote Ubuntu host is missing one or more security-related
patches."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"Alin Rad Pop discovered that AbiWord's Link Grammar parser did not
correctly handle overly-long words. If a user were tricked into
opening a specially crafted document, AbiWord, or other applications
using Link Grammar, could be made to crash.

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/545-1/"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
  script_cwe_id(119);

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:liblink-grammar4");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:liblink-grammar4-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:link-grammar");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:link-grammar-dictionaries-en");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:7.10");

  script_set_attribute(attribute:"patch_publication_date", value:"2007/11/26");
  script_set_attribute(attribute:"plugin_publication_date", value:"2007/11/29");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"Ubuntu Security Notice (C) 2007-2019 Canonical, Inc. / NASL script (C) 2018 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 (! ereg(pattern:"^(7\.10)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 7.10", "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:"7.10", pkgname:"liblink-grammar4", pkgver:"4.2.2-4ubuntu0.7.10.1")) flag++;
if (ubuntu_check(osver:"7.10", pkgname:"liblink-grammar4-dev", pkgver:"4.2.2-4ubuntu0.7.10.1")) flag++;
if (ubuntu_check(osver:"7.10", pkgname:"link-grammar", pkgver:"4.2.2-4ubuntu0.7.10.1")) flag++;
if (ubuntu_check(osver:"7.10", pkgname:"link-grammar-dictionaries-en", pkgver:"4.2.2-4ubuntu0.7.10.1")) 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, "liblink-grammar4 / liblink-grammar4-dev / link-grammar / etc");
}
  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2007-3235.NASL
    descriptionCVE-2007-5395 is fixed in this release Note that Tenable Network Security has extracted the preceding description block directly from the Fedora 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 id28189
    published2007-11-14
    reporterThis script is Copyright (C) 2007-2019 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/28189
    titleFedora 8 : link-grammar-4.2.5-1.fc8 (2007-3235)
    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 2007-3235.
#

include("compat.inc");

if (description)
{
  script_id(28189);
  script_version ("1.13");
  script_cvs_date("Date: 2019/08/02 13:32:25");

  script_cve_id("CVE-2007-5395");
  script_xref(name:"FEDORA", value:"2007-3235");

  script_name(english:"Fedora 8 : link-grammar-4.2.5-1.fc8 (2007-3235)");
  script_summary(english:"Checks rpm output for the updated packages.");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Fedora host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"CVE-2007-5395 is fixed in this release

Note that Tenable Network Security has extracted the preceding
description block directly from the Fedora 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://bugzilla.redhat.com/show_bug.cgi?id=371221"
  );
  # https://lists.fedoraproject.org/pipermail/package-announce/2007-November/004742.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?f24e9333"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"Update the affected link-grammar, link-grammar-debuginfo and / or
link-grammar-devel packages."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
  script_cwe_id(119);

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fedoraproject:fedora:link-grammar");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fedoraproject:fedora:link-grammar-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fedoraproject:fedora:link-grammar-devel");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:8");

  script_set_attribute(attribute:"patch_publication_date", value:"2007/11/13");
  script_set_attribute(attribute:"plugin_publication_date", value:"2007/11/14");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2007-2019 Tenable Network Security, Inc.");
  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 = eregmatch(pattern: "Fedora.*release ([0-9]+)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Fedora");
os_ver = os_ver[1];
if (! ereg(pattern:"^8([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Fedora 8.x", "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:"FC8", reference:"link-grammar-4.2.5-1.fc8")) flag++;
if (rpm_check(release:"FC8", reference:"link-grammar-debuginfo-4.2.5-1.fc8")) flag++;
if (rpm_check(release:"FC8", reference:"link-grammar-devel-4.2.5-1.fc8")) flag++;


if (flag)
{
  if (report_verbosity > 0) security_hole(port:0, extra:rpm_report_get());
  else security_hole(0);
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "link-grammar / link-grammar-debuginfo / link-grammar-devel");
}
  • NASL familyGentoo Local Security Checks
    NASL idGENTOO_GLSA-200711-27.NASL
    descriptionThe remote host is affected by the vulnerability described in GLSA-200711-27 (Link Grammar: User-assisted execution of arbitrary code) Alin Rad Pop from Secunia Research discovered a boundary error in the function separate_sentence() in file tokenize.c when processing an overly long word which might lead to a stack-based buffer overflow. Impact : A remote attacker could entice a user to parse a specially crafted sentence, resulting in the remote execution of arbitrary code with the privileges of the user running the application. Note that this vulnerability may be triggered by an application using Link Grammar to parse sentences (e.g. AbiWord). Workaround : There is no known workaround at this time.
    last seen2020-06-01
    modified2020-06-02
    plugin id28266
    published2007-11-20
    reporterThis script is Copyright (C) 2007-2019 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/28266
    titleGLSA-200711-27 : Link Grammar: User-assisted execution of arbitrary code
    code
    #%NASL_MIN_LEVEL 80502
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Gentoo Linux Security Advisory GLSA 200711-27.
#
# The advisory text is Copyright (C) 2001-2015 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(28266);
  script_version("1.14");
  script_cvs_date("Date: 2019/08/02 13:32:44");

  script_cve_id("CVE-2007-5395");
  script_xref(name:"GLSA", value:"200711-27");

  script_name(english:"GLSA-200711-27 : Link Grammar: User-assisted execution of arbitrary code");
  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-200711-27
(Link Grammar: User-assisted execution of arbitrary code)

    Alin Rad Pop from Secunia Research discovered a boundary error in the
    function separate_sentence() in file tokenize.c when processing an
    overly long word which might lead to a stack-based buffer overflow.
  
Impact :

    A remote attacker could entice a user to parse a specially crafted
    sentence, resulting in the remote execution of arbitrary code with the
    privileges of the user running the application. Note that this
    vulnerability may be triggered by an application using Link Grammar to
    parse sentences (e.g. AbiWord).
  
Workaround :

    There is no known workaround at this time."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security.gentoo.org/glsa/200711-27"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"All Link Grammar users should upgrade to the latest version:
    # emerge --sync
    # emerge --ask --oneshot --verbose '>=dev-libs/link-grammar-4.2.4-r1'"
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
  script_cwe_id(119);

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:gentoo:linux:link-grammar");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:gentoo:linux");

  script_set_attribute(attribute:"patch_publication_date", value:"2007/11/18");
  script_set_attribute(attribute:"plugin_publication_date", value:"2007/11/20");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2007-2019 Tenable Network Security, Inc.");
  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:"dev-libs/link-grammar", unaffected:make_list("ge 4.2.4-r1"), vulnerable:make_list("lt 4.2.4-r1"))) 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, "Link Grammar");
}

References