Vulnerabilities > CVE-2018-17294 - Out-of-bounds Read vulnerability in multiple products

047910
CVSS 6.5 - MEDIUM
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
NONE
Integrity impact
NONE
Availability impact
HIGH
network
low complexity
liblouis
canonical
opensuse
CWE-125
nessus
NVD
Published: 2018-09-21
Updated: 2024-11-21

Summary

The matchCurrentInput function inside lou_translateString.c of Liblouis prior to 3.7 does not check the input string's length, allowing attackers to cause a denial of service (application crash via out-of-bounds read) by crafting an input file with certain translation dictionaries.

Vulnerable Configurations

Part Description Count
Application
Liblouis
37
OS
Canonical
3
OS
Opensuse
1

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_2018-E470C7F387.NASL
    descriptionSecurity fix for CVE-2018-17294 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 seen2020-06-05
    modified2019-01-03
    plugin id120863
    published2019-01-03
    reporterThis script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/120863
    titleFedora 29 : liblouis (2018-e470c7f387)
    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 FEDORA-2018-e470c7f387.
#

include("compat.inc");

if (description)
{
  script_id(120863);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/04");

  script_cve_id("CVE-2018-17294");
  script_xref(name:"FEDORA", value:"2018-e470c7f387");

  script_name(english:"Fedora 29 : liblouis (2018-e470c7f387)");
  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:
"Security fix for CVE-2018-17294

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-2018-e470c7f387"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected liblouis package."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:N/I:N/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:R/S:U/C:N/I:N/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:liblouis");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:29");

  script_set_attribute(attribute:"vuln_publication_date", value:"2018/09/21");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/10/02");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/01/03");
  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:"^29([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Fedora 29", "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:"FC29", reference:"liblouis-3.7.0-1.fc29")) flag++;


if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    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, "liblouis");
}
  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2018-9A09435935.NASL
    descriptionSecurity fix for CVE-2018-17294 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 seen2020-06-05
    modified2018-10-09
    plugin id117963
    published2018-10-09
    reporterThis script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/117963
    titleFedora 27 : liblouis (2018-9a09435935)
    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 FEDORA-2018-9a09435935.
#

include("compat.inc");

if (description)
{
  script_id(117963);
  script_version("1.6");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/04");

  script_cve_id("CVE-2018-17294");
  script_xref(name:"FEDORA", value:"2018-9a09435935");

  script_name(english:"Fedora 27 : liblouis (2018-9a09435935)");
  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:
"Security fix for CVE-2018-17294

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-2018-9a09435935"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected liblouis package."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:N/I:N/A:P");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fedoraproject:fedora:liblouis");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:27");

  script_set_attribute(attribute:"vuln_publication_date", value:"2018/09/21");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/10/07");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/10/09");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2018-2020 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:"^27([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Fedora 27", "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:"FC27", reference:"liblouis-2.6.2-13.fc27")) flag++;


if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    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, "liblouis");
}
  • NASL familySuSE Local Security Checks
    NASL idSUSE_SU-2019-13994-1.NASL
    descriptionThis update for liblouis and python-louis fixes the following issue : Security issue fixed : CVE-2018-17294: Fixed an out of bounds read in matchCurrentInput function which could allow a remote attacker to cause Denail of Service (bsc#1109319). Note that Tenable Network Security has extracted the preceding description block directly from the SUSE 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 id123552
    published2019-04-01
    reporterThis script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/123552
    titleSUSE SLES11 Security Update : liblouis (SUSE-SU-2019:13994-1)
  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2018-70FAC49405.NASL
    descriptionSecurity fix for CVE-2018-17294 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 seen2020-06-05
    modified2019-01-03
    plugin id120521
    published2019-01-03
    reporterThis script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/120521
    titleFedora 28 : liblouis (2018-70fac49405)
  • NASL familyUbuntu Local Security Checks
    NASL idUBUNTU_USN-3782-1.NASL
    descriptionHenri Salo discovered that Liblouis incorrectly handled certain files. An attacker could possibly use this issue to execute arbitrary code. (CVE-2018-12085) It was discovered that Liblouis incorrectly handled certain files. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 18.04 LTS. (CVE-2018-17294). 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 id117915
    published2018-10-04
    reporterUbuntu Security Notice (C) 2018-2019 Canonical, Inc. / NASL script (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/117915
    titleUbuntu 14.04 LTS / 16.04 LTS / 18.04 LTS : liblouis vulnerabilities (USN-3782-1)
  • NASL familySuSE Local Security Checks
    NASL idOPENSUSE-2019-1160.NASL
    descriptionThis update for liblouis fixes the following issues : Security issues fixed : - CVE-2018-17294: Fixed an out of bounds read in matchCurrentInput function which could allow a remote attacker to cause Denail of Service (bsc#1109319). - CVE-2018-11410: Fixed an invalid free in the compileRule function in compileTranslationTable.c (bsc#1094685) - CVE-2018-11440: Fixed a stack-based buffer overflow in the function parseChars() in compileTranslationTable.c (bsc#1095189) - CVE-2018-11577: Fixed a segmentation fault in lou_logPrint in logging.c (bsc#1095945) - CVE-2018-11683: Fixed a stack-based buffer overflow in the function parseChars() in compileTranslationTable.c (different vulnerability than CVE-2018-11440) (bsc#1095827) - CVE-2018-11684: Fixed stack-based buffer overflow in the function includeFile() in compileTranslationTable.c (bsc#1095826) - CVE-2018-11685: Fixed a stack-based buffer overflow in the function compileHyphenation() in compileTranslationTable.c (bsc#1095825) - CVE-2018-12085: Fixed a stack-based buffer overflow in the function parseChars() in compileTranslationTable.c (different vulnerability than CVE-2018-11440) (bsc#1097103) This update was imported from the SUSE:SLE-15:Update update project.
    last seen2020-06-01
    modified2020-06-02
    plugin id123815
    published2019-04-08
    reporterThis script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/123815
    titleopenSUSE Security Update : liblouis (openSUSE-2019-1160)
  • NASL familySuSE Local Security Checks
    NASL idSUSE_SU-2019-0795-1.NASL
    descriptionThis update for liblouis fixes the following issues : Security issues fixed : CVE-2018-17294: Fixed an out of bounds read in matchCurrentInput function which could allow a remote attacker to cause Denail of Service (bsc#1109319). CVE-2018-11410: Fixed an invalid free in the compileRule function in compileTranslationTable.c (bsc#1094685) CVE-2018-11440: Fixed a stack-based buffer overflow in the function parseChars() in compileTranslationTable.c (bsc#1095189) CVE-2018-11577: Fixed a segmentation fault in lou_logPrint in logging.c (bsc#1095945) CVE-2018-11683: Fixed a stack-based buffer overflow in the function parseChars() in compileTranslationTable.c (different vulnerability than CVE-2018-11440) (bsc#1095827) CVE-2018-11684: Fixed stack-based buffer overflow in the function includeFile() in compileTranslationTable.c (bsc#1095826) CVE-2018-11685: Fixed a stack-based buffer overflow in the function compileHyphenation() in compileTranslationTable.c (bsc#1095825) CVE-2018-12085: Fixed a stack-based buffer overflow in the function parseChars() in compileTranslationTable.c (different vulnerability than CVE-2018-11440) (bsc#1097103) Note that Tenable Network Security has extracted the preceding description block directly from the SUSE 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 id123501
    published2019-03-29
    reporterThis script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/123501
    titleSUSE SLED15 / SLES15 Security Update : liblouis (SUSE-SU-2019:0795-1)

References