Vulnerabilities > CVE-2018-20430 - Out-of-bounds Read vulnerability in multiple products
Attack vector
NETWORK Attack complexity
LOW Privileges required
NONE Confidentiality impact
NONE Integrity impact
NONE Availability impact
HIGH Summary
GNU Libextractor through 1.8 has an out-of-bounds read vulnerability in the function history_extract() in plugins/ole2_extractor.c, related to EXTRACTOR_common_convert_to_utf8 in common/convert.c.
Vulnerable Configurations
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 family Debian Local Security Checks NASL id DEBIAN_DLA-1616.NASL description Two security issues were discovered in libextractor, a library for extracting meta data from files of arbitrary type. An out-of-bounds read in common/convert.c and a NULL pointer Dereference in the OLE2 extractor may lead to a denial of service (application crash). For Debian 8 last seen 2020-03-26 modified 2018-12-27 plugin id 119876 published 2018-12-27 reporter This script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/119876 title Debian DLA-1616-1 : libextractor security update code # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from Debian Security Advisory DLA-1616-1. The text # itself is copyright (C) Software in the Public Interest, Inc. # include("compat.inc"); if (description) { script_id(119876); script_version("1.3"); script_set_attribute(attribute:"plugin_modification_date", value:"2020/03/25"); script_cve_id("CVE-2018-20430", "CVE-2018-20431"); script_name(english:"Debian DLA-1616-1 : libextractor 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: "Two security issues were discovered in libextractor, a library for extracting meta data from files of arbitrary type. An out-of-bounds read in common/convert.c and a NULL pointer Dereference in the OLE2 extractor may lead to a denial of service (application crash). For Debian 8 'Jessie', these problems have been fixed in version 1:1.3-2+deb8u4. We recommend that you upgrade your libextractor 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/2018/12/msg00015.html" ); script_set_attribute( attribute:"see_also", value:"https://packages.debian.org/source/jessie/libextractor" ); script_set_attribute(attribute:"solution", value:"Upgrade the affected packages."); 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:debian:debian_linux:extract"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libextractor-dbg"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libextractor-dev"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libextractor3"); script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:8.0"); script_set_attribute(attribute:"vuln_publication_date", value:"2018/12/24"); script_set_attribute(attribute:"patch_publication_date", value:"2018/12/24"); script_set_attribute(attribute:"plugin_publication_date", value:"2018/12/27"); 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:"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:"extract", reference:"1:1.3-2+deb8u4")) flag++; if (deb_check(release:"8.0", prefix:"libextractor-dbg", reference:"1:1.3-2+deb8u4")) flag++; if (deb_check(release:"8.0", prefix:"libextractor-dev", reference:"1:1.3-2+deb8u4")) flag++; if (deb_check(release:"8.0", prefix:"libextractor3", reference:"1:1.3-2+deb8u4")) 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 family Debian Local Security Checks NASL id DEBIAN_DSA-4361.NASL description Several vulnerabilities were discovered in libextractor, a library to extract arbitrary meta-data from files, which may lead to denial of service or memory disclosure if a malformed OLE file is processed. last seen 2020-03-23 modified 2018-12-31 plugin id 119943 published 2018-12-31 reporter This script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/119943 title Debian DSA-4361-1 : libextractor - security update code # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from Debian Security Advisory DSA-4361. The text # itself is copyright (C) Software in the Public Interest, Inc. # include("compat.inc"); if (description) { script_id(119943); script_version("1.3"); script_set_attribute(attribute:"plugin_modification_date", value:"2020/03/23"); script_cve_id("CVE-2018-20430", "CVE-2018-20431"); script_xref(name:"DSA", value:"4361"); script_name(english:"Debian DSA-4361-1 : libextractor - 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 vulnerabilities were discovered in libextractor, a library to extract arbitrary meta-data from files, which may lead to denial of service or memory disclosure if a malformed OLE file is processed." ); # https://security-tracker.debian.org/tracker/source-package/libextractor script_set_attribute( attribute:"see_also", value:"http://www.nessus.org/u?bd14df80" ); script_set_attribute( attribute:"see_also", value:"https://packages.debian.org/source/stretch/libextractor" ); script_set_attribute( attribute:"see_also", value:"https://www.debian.org/security/2018/dsa-4361" ); script_set_attribute( attribute:"solution", value: "Upgrade the libextractor packages. For the stable distribution (stretch), these problems have been fixed in version 1:1.3-4+deb9u3." ); 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:debian:debian_linux:libextractor"); script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:9.0"); script_set_attribute(attribute:"vuln_publication_date", value:"2018/12/24"); script_set_attribute(attribute:"patch_publication_date", value:"2018/12/28"); script_set_attribute(attribute:"plugin_publication_date", value:"2018/12/31"); 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:"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:"9.0", prefix:"extract", reference:"1:1.3-4+deb9u3")) flag++; if (deb_check(release:"9.0", prefix:"libextractor-dbg", reference:"1:1.3-4+deb9u3")) flag++; if (deb_check(release:"9.0", prefix:"libextractor-dev", reference:"1:1.3-4+deb9u3")) flag++; if (deb_check(release:"9.0", prefix:"libextractor3", reference:"1:1.3-4+deb9u3")) 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
- https://gnunet.org/git/libextractor.git/tree/ChangeLog
- https://gnunet.org/git/libextractor.git/commit/?id=b405d707b36e0654900cba78e89f49779efea110
- https://gnunet.org/bugs/view.php?id=5493
- https://lists.debian.org/debian-lts-announce/2018/12/msg00015.html
- http://www.securityfocus.com/bid/106300
- https://www.debian.org/security/2018/dsa-4361