Vulnerabilities > CVE-2020-1730 - NULL Pointer Dereference vulnerability in multiple products
Attack vector
NETWORK Attack complexity
LOW Privileges required
NONE Confidentiality impact
NONE Integrity impact
NONE Availability impact
LOW Summary
A flaw was found in libssh versions before 0.8.9 and before 0.9.4 in the way it handled AES-CTR (or DES ciphers if enabled) ciphers. The server or client could crash when the connection hasn't been fully initialized and the system tries to cleanup the ciphers when closing the connection. The biggest threat from this vulnerability is system availability.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
Nessus
NASL family Huawei Local Security Checks NASL id EULEROS_SA-2020-1509.NASL description According to the version of the libssh package installed, the EulerOS installation on the remote host is affected by the following vulnerability : - A flaw was found in libssh versions before 0.8.9 and before 0.9.4 in the way it handled AES-CTR (or DES ciphers if enabled) ciphers. The server or client could crash when the connection hasn last seen 2020-05-16 modified 2020-04-20 plugin id 135742 published 2020-04-20 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/135742 title EulerOS 2.0 SP8 : libssh (EulerOS-SA-2020-1509) code # # (C) Tenable Network Security, Inc. # include("compat.inc"); if (description) { script_id(135742); script_version("1.5"); script_set_attribute(attribute:"plugin_modification_date", value:"2020/07/14"); script_cve_id( "CVE-2020-1730" ); script_xref(name:"IAVA", value:"2020-A-0203"); script_name(english:"EulerOS 2.0 SP8 : libssh (EulerOS-SA-2020-1509)"); script_summary(english:"Checks the rpm output for the updated package."); script_set_attribute(attribute:"synopsis", value: "The remote EulerOS host is missing a security update."); script_set_attribute(attribute:"description", value: "According to the version of the libssh package installed, the EulerOS installation on the remote host is affected by the following vulnerability : - A flaw was found in libssh versions before 0.8.9 and before 0.9.4 in the way it handled AES-CTR (or DES ciphers if enabled) ciphers. The server or client could crash when the connection hasn't been fully initialized and the system tries to cleanup the ciphers when closing the connection. The biggest threat from this vulnerability is system availability.(CVE-2020-1730) Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues."); # https://developer.huaweicloud.com/ict/en/site-euleros/euleros/security-advisories/EulerOS-SA-2020-1509 script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?c6fd12b2"); script_set_attribute(attribute:"solution", value: "Update the affected libssh package."); script_set_cvss_base_vector("CVSS2#AV:N/AC:L/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:N/S:U/C:N/I:N/A:L"); script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C"); script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-1730"); script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available"); script_set_attribute(attribute:"patch_publication_date", value:"2020/04/20"); script_set_attribute(attribute:"plugin_publication_date", value:"2020/04/20"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:libssh"); script_set_attribute(attribute:"cpe", value:"cpe:/o:huawei:euleros:2.0"); script_set_attribute(attribute:"generated_plugin", value:"current"); script_set_attribute(attribute:"stig_severity", value:"I"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_family(english:"Huawei Local Security Checks"); script_copyright(english:"This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof."); script_dependencies("ssh_get_info.nasl"); script_require_keys("Host/local_checks_enabled", "Host/EulerOS/release", "Host/EulerOS/rpm-list", "Host/EulerOS/sp"); script_exclude_keys("Host/EulerOS/uvp_version"); 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/EulerOS/release"); if (isnull(release) || release !~ "^EulerOS") audit(AUDIT_OS_NOT, "EulerOS"); if (release !~ "^EulerOS release 2\.0(\D|$)") audit(AUDIT_OS_NOT, "EulerOS 2.0"); sp = get_kb_item("Host/EulerOS/sp"); if (isnull(sp) || sp !~ "^(8)$") audit(AUDIT_OS_NOT, "EulerOS 2.0 SP8"); uvp = get_kb_item("Host/EulerOS/uvp_version"); if (!empty_or_null(uvp)) audit(AUDIT_OS_NOT, "EulerOS 2.0 SP8", "EulerOS UVP " + uvp); if (!get_kb_item("Host/EulerOS/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$" && "aarch64" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "EulerOS", cpu); if ("aarch64" >!< cpu) audit(AUDIT_ARCH_NOT, "aarch64", cpu); flag = 0; pkgs = ["libssh-0.8.3-3.h4.eulerosv2r8"]; foreach (pkg in pkgs) if (rpm_check(release:"EulerOS-2.0", sp:"8", reference:pkg)) 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, "libssh"); }
NASL family Fedora Local Security Checks NASL id FEDORA_2020-5A77F0D68F.NASL description Fixes CVE-2020-1730 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 seen 2020-05-16 modified 2020-04-20 plugin id 135727 published 2020-04-20 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/135727 title Fedora 31 : libssh (2020-5a77f0d68f) code # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from Fedora Security Advisory FEDORA-2020-5a77f0d68f. # include("compat.inc"); if (description) { script_id(135727); script_version("1.4"); script_set_attribute(attribute:"plugin_modification_date", value:"2020/07/14"); script_cve_id("CVE-2020-1730"); script_xref(name:"FEDORA", value:"2020-5a77f0d68f"); script_xref(name:"IAVA", value:"2020-A-0203"); script_name(english:"Fedora 31 : libssh (2020-5a77f0d68f)"); 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: "Fixes CVE-2020-1730 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-2020-5a77f0d68f" ); script_set_attribute( attribute:"solution", value:"Update the affected libssh package." ); script_set_cvss_base_vector("CVSS2#AV:N/AC:L/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:N/S:U/C:N/I:N/A:L"); script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C"); script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-1730"); 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:libssh"); script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:31"); script_set_attribute(attribute:"vuln_publication_date", value:"2020/04/13"); script_set_attribute(attribute:"patch_publication_date", value:"2020/04/18"); script_set_attribute(attribute:"plugin_publication_date", value:"2020/04/20"); script_set_attribute(attribute:"generated_plugin", value:"current"); script_set_attribute(attribute:"stig_severity", value:"I"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 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:"^31([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Fedora 31", "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:"FC31", reference:"libssh-0.9.4-2.fc31")) 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, "libssh"); }
NASL family Gentoo Local Security Checks NASL id GENTOO_GLSA-202004-08.NASL description The remote host is affected by the vulnerability described in GLSA-202004-08 (libssh: Denial of Service) It was discovered that libssh could crash when AES-CTR ciphers are used. Impact : A remote attacker running a malicious client or server could possibly crash the counterpart implemented with libssh and cause a Denial of Service condition. Workaround : Disable AES-CTR ciphers. If you implement a server using libssh it is recommended to use a prefork model so each session runs in an own process. last seen 2020-05-16 modified 2020-04-14 plugin id 135426 published 2020-04-14 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/135426 title GLSA-202004-08 : libssh: Denial of Service code # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from Gentoo Linux Security Advisory GLSA 202004-08. # # The advisory text is Copyright (C) 2001-2020 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(135426); script_version("1.4"); script_set_attribute(attribute:"plugin_modification_date", value:"2020/07/14"); script_cve_id("CVE-2020-1730"); script_xref(name:"GLSA", value:"202004-08"); script_xref(name:"IAVA", value:"2020-A-0203"); script_name(english:"GLSA-202004-08 : libssh: Denial of Service"); 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-202004-08 (libssh: Denial of Service) It was discovered that libssh could crash when AES-CTR ciphers are used. Impact : A remote attacker running a malicious client or server could possibly crash the counterpart implemented with libssh and cause a Denial of Service condition. Workaround : Disable AES-CTR ciphers. If you implement a server using libssh it is recommended to use a prefork model so each session runs in an own process." ); script_set_attribute( attribute:"see_also", value:"https://security.gentoo.org/glsa/202004-08" ); script_set_attribute( attribute:"solution", value: "All libssh users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose '>=net-libs/libssh-0.9.4'" ); script_set_cvss_base_vector("CVSS2#AV:N/AC:L/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:N/S:U/C:N/I:N/A:L"); script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C"); script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-1730"); 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:gentoo:linux:libssh"); script_set_attribute(attribute:"cpe", value:"cpe:/o:gentoo:linux"); script_set_attribute(attribute:"vuln_publication_date", value:"2020/04/13"); script_set_attribute(attribute:"patch_publication_date", value:"2020/04/10"); script_set_attribute(attribute:"plugin_publication_date", value:"2020/04/14"); script_set_attribute(attribute:"generated_plugin", value:"current"); script_set_attribute(attribute:"stig_severity", value:"I"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof."); 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:"net-libs/libssh", unaffected:make_list("ge 0.9.4"), vulnerable:make_list("lt 0.9.4"))) flag++; if (flag) { if (report_verbosity > 0) security_warning(port:0, extra:qpkg_report_get()); else security_warning(0); exit(0); } else { tested = qpkg_tests_get(); if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested); else audit(AUDIT_PACKAGE_NOT_INSTALLED, "libssh"); }
NASL family SuSE Local Security Checks NASL id SUSE_SU-2020-0967-1.NASL description This update for libssh fixes the following issues : CVE-2020-1730: Fixed a possible denial of service when using AES-CTR (bsc#1168699). 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 seen 2020-05-16 modified 2020-04-10 plugin id 135392 published 2020-04-10 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/135392 title SUSE SLED15 / SLES15 Security Update : libssh (SUSE-SU-2020:0967-1) code # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from SUSE update advisory SUSE-SU-2020:0967-1. # The text itself is copyright (C) SUSE. # include("compat.inc"); if (description) { script_id(135392); script_version("1.5"); script_set_attribute(attribute:"plugin_modification_date", value:"2020/07/14"); script_cve_id("CVE-2020-1730"); script_xref(name:"IAVA", value:"2020-A-0203"); script_name(english:"SUSE SLED15 / SLES15 Security Update : libssh (SUSE-SU-2020:0967-1)"); script_summary(english:"Checks rpm output for the updated packages."); script_set_attribute( attribute:"synopsis", value:"The remote SUSE host is missing one or more security updates." ); script_set_attribute( attribute:"description", value: "This update for libssh fixes the following issues : CVE-2020-1730: Fixed a possible denial of service when using AES-CTR (bsc#1168699). 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." ); script_set_attribute( attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1168699" ); script_set_attribute( attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2020-1730/" ); # https://www.suse.com/support/update/announcement/2020/suse-su-20200967-1/ script_set_attribute( attribute:"see_also", value:"http://www.nessus.org/u?3fd6862e" ); script_set_attribute( attribute:"solution", value: "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or 'zypper patch'. Alternatively you can run the command listed for your product : SUSE Linux Enterprise Module for Open Buildservice Development Tools 15-SP1:zypper in -t patch SUSE-SLE-Module-Development-Tools-OBS-15-SP1-2020-967=1 SUSE Linux Enterprise Module for Basesystem 15-SP1:zypper in -t patch SUSE-SLE-Module-Basesystem-15-SP1-2020-967=1" ); script_set_cvss_base_vector("CVSS2#AV:N/AC:L/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:N/S:U/C:N/I:N/A:L"); script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C"); script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-1730"); 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:novell:suse_linux:libssh-debugsource"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:libssh-devel"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:libssh4"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:libssh4-32bit-debuginfo"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:libssh4-debuginfo"); script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:suse_linux:15"); script_set_attribute(attribute:"vuln_publication_date", value:"2020/04/13"); script_set_attribute(attribute:"patch_publication_date", value:"2020/04/09"); script_set_attribute(attribute:"plugin_publication_date", value:"2020/04/10"); script_set_attribute(attribute:"generated_plugin", value:"current"); script_set_attribute(attribute:"stig_severity", value:"I"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof."); script_family(english:"SuSE Local Security Checks"); script_dependencies("ssh_get_info.nasl"); script_require_keys("Host/local_checks_enabled", "Host/cpu", "Host/SuSE/release", "Host/SuSE/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/SuSE/release"); if (isnull(release) || release !~ "^(SLED|SLES)") audit(AUDIT_OS_NOT, "SUSE"); os_ver = pregmatch(pattern: "^(SLE(S|D)\d+)", string:release); if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "SUSE"); os_ver = os_ver[1]; if (! preg(pattern:"^(SLED15|SLES15)$", string:os_ver)) audit(AUDIT_OS_NOT, "SUSE SLED15 / SLES15", "SUSE " + os_ver); if (!get_kb_item("Host/SuSE/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING); cpu = get_kb_item("Host/cpu"); if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH); if (cpu !~ "^i[3-6]86$" && "x86_64" >!< cpu && "s390x" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "SUSE " + os_ver, cpu); sp = get_kb_item("Host/SuSE/patchlevel"); if (isnull(sp)) sp = "0"; if (os_ver == "SLES15" && (! preg(pattern:"^(1)$", string:sp))) audit(AUDIT_OS_NOT, "SLES15 SP1", os_ver + " SP" + sp); if (os_ver == "SLED15" && (! preg(pattern:"^(1)$", string:sp))) audit(AUDIT_OS_NOT, "SLED15 SP1", os_ver + " SP" + sp); flag = 0; if (rpm_check(release:"SLES15", sp:"1", cpu:"x86_64", reference:"libssh4-32bit-0.8.7-10.12.1")) flag++; if (rpm_check(release:"SLES15", sp:"1", cpu:"x86_64", reference:"libssh4-32bit-debuginfo-0.8.7-10.12.1")) flag++; if (rpm_check(release:"SLES15", sp:"1", reference:"libssh-debugsource-0.8.7-10.12.1")) flag++; if (rpm_check(release:"SLES15", sp:"1", reference:"libssh-debugsource-0.8.7-10.12.1")) flag++; if (rpm_check(release:"SLES15", sp:"1", reference:"libssh-devel-0.8.7-10.12.1")) flag++; if (rpm_check(release:"SLES15", sp:"1", reference:"libssh4-0.8.7-10.12.1")) flag++; if (rpm_check(release:"SLES15", sp:"1", reference:"libssh4-debuginfo-0.8.7-10.12.1")) flag++; if (rpm_check(release:"SLED15", sp:"1", cpu:"x86_64", reference:"libssh4-32bit-0.8.7-10.12.1")) flag++; if (rpm_check(release:"SLED15", sp:"1", cpu:"x86_64", reference:"libssh4-32bit-debuginfo-0.8.7-10.12.1")) flag++; if (rpm_check(release:"SLED15", sp:"1", reference:"libssh-debugsource-0.8.7-10.12.1")) flag++; if (rpm_check(release:"SLED15", sp:"1", reference:"libssh-debugsource-0.8.7-10.12.1")) flag++; if (rpm_check(release:"SLED15", sp:"1", reference:"libssh-devel-0.8.7-10.12.1")) flag++; if (rpm_check(release:"SLED15", sp:"1", reference:"libssh4-0.8.7-10.12.1")) flag++; if (rpm_check(release:"SLED15", sp:"1", reference:"libssh4-debuginfo-0.8.7-10.12.1")) flag++; if (flag) { if (report_verbosity > 0) security_warning(port:0, extra:rpm_report_get()); else security_warning(0); exit(0); } else { tested = pkg_tests_get(); if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested); else audit(AUDIT_PACKAGE_NOT_INSTALLED, "libssh"); }
NASL family SuSE Local Security Checks NASL id OPENSUSE-2020-510.NASL description This update for libssh fixes the following issues : - CVE-2020-1730: Fixed a possible denial of service when using AES-CTR (bsc#1168699). This update was imported from the SUSE:SLE-15-SP1:Update update project. last seen 2020-05-16 modified 2020-04-14 plugin id 135452 published 2020-04-14 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/135452 title openSUSE Security Update : libssh (openSUSE-2020-510) code # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from openSUSE Security Update openSUSE-2020-510. # # The text description of this plugin is (C) SUSE LLC. # include("compat.inc"); if (description) { script_id(135452); script_version("1.4"); script_set_attribute(attribute:"plugin_modification_date", value:"2020/07/14"); script_cve_id("CVE-2020-1730"); script_xref(name:"IAVA", value:"2020-A-0203"); script_name(english:"openSUSE Security Update : libssh (openSUSE-2020-510)"); script_summary(english:"Check for the openSUSE-2020-510 patch"); script_set_attribute( attribute:"synopsis", value:"The remote openSUSE host is missing a security update." ); script_set_attribute( attribute:"description", value: "This update for libssh fixes the following issues : - CVE-2020-1730: Fixed a possible denial of service when using AES-CTR (bsc#1168699). This update was imported from the SUSE:SLE-15-SP1:Update update project." ); script_set_attribute( attribute:"see_also", value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1168699" ); script_set_attribute( attribute:"solution", value:"Update the affected libssh packages." ); script_set_cvss_base_vector("CVSS2#AV:N/AC:L/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:N/S:U/C:N/I:N/A:L"); script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C"); script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-1730"); 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:novell:opensuse:libssh-debugsource"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libssh-devel"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libssh4"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libssh4-32bit"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libssh4-32bit-debuginfo"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libssh4-debuginfo"); script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:opensuse:15.1"); script_set_attribute(attribute:"vuln_publication_date", value:"2020/04/13"); script_set_attribute(attribute:"patch_publication_date", value:"2020/04/12"); script_set_attribute(attribute:"plugin_publication_date", value:"2020/04/14"); script_set_attribute(attribute:"generated_plugin", value:"current"); script_set_attribute(attribute:"stig_severity", value:"I"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof."); script_family(english:"SuSE Local Security Checks"); script_dependencies("ssh_get_info.nasl"); script_require_keys("Host/local_checks_enabled", "Host/SuSE/release", "Host/SuSE/rpm-list", "Host/cpu"); 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/SuSE/release"); if (isnull(release) || release =~ "^(SLED|SLES)") audit(AUDIT_OS_NOT, "openSUSE"); if (release !~ "^(SUSE15\.1)$") audit(AUDIT_OS_RELEASE_NOT, "openSUSE", "15.1", release); if (!get_kb_item("Host/SuSE/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING); ourarch = get_kb_item("Host/cpu"); if (!ourarch) audit(AUDIT_UNKNOWN_ARCH); if (ourarch !~ "^(i586|i686|x86_64)$") audit(AUDIT_ARCH_NOT, "i586 / i686 / x86_64", ourarch); flag = 0; if ( rpm_check(release:"SUSE15.1", reference:"libssh-debugsource-0.8.7-lp151.2.12.1") ) flag++; if ( rpm_check(release:"SUSE15.1", reference:"libssh-devel-0.8.7-lp151.2.12.1") ) flag++; if ( rpm_check(release:"SUSE15.1", reference:"libssh4-0.8.7-lp151.2.12.1") ) flag++; if ( rpm_check(release:"SUSE15.1", reference:"libssh4-debuginfo-0.8.7-lp151.2.12.1") ) flag++; if ( rpm_check(release:"SUSE15.1", cpu:"x86_64", reference:"libssh4-32bit-0.8.7-lp151.2.12.1") ) flag++; if ( rpm_check(release:"SUSE15.1", cpu:"x86_64", reference:"libssh4-32bit-debuginfo-0.8.7-lp151.2.12.1") ) flag++; if (flag) { if (report_verbosity > 0) security_warning(port:0, extra:rpm_report_get()); else security_warning(0); exit(0); } else { tested = pkg_tests_get(); if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested); else audit(AUDIT_PACKAGE_NOT_INSTALLED, "libssh-debugsource / libssh-devel / libssh4 / libssh4-debuginfo / etc"); }
NASL family Ubuntu Local Security Checks NASL id UBUNTU_USN-4327-1.NASL description Yasheng Yang discovered that libssh incorrectly handled AES-CTR ciphers. A remote attacker could possibly use this issue to cause libssh to crash, resulting in a denial of service. 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 seen 2020-05-16 modified 2020-04-10 plugin id 135399 published 2020-04-10 reporter Ubuntu Security Notice (C) 2020 Canonical, Inc. / NASL script (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/135399 title Ubuntu 18.04 LTS / 19.10 : libssh vulnerability (USN-4327-1) code # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from Ubuntu Security Notice USN-4327-1. 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(135399); script_version("1.5"); script_set_attribute(attribute:"plugin_modification_date", value:"2020/07/14"); script_cve_id("CVE-2020-1730"); script_xref(name:"USN", value:"4327-1"); script_xref(name:"IAVA", value:"2020-A-0203"); script_name(english:"Ubuntu 18.04 LTS / 19.10 : libssh vulnerability (USN-4327-1)"); 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: "Yasheng Yang discovered that libssh incorrectly handled AES-CTR ciphers. A remote attacker could possibly use this issue to cause libssh to crash, resulting in a denial of service. 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/4327-1/" ); script_set_attribute( attribute:"solution", value:"Update the affected libssh-4 package." ); script_set_cvss_base_vector("CVSS2#AV:N/AC:L/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:N/S:U/C:N/I:N/A:L"); script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C"); script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-1730"); 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:canonical:ubuntu_linux:libssh-4"); script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:18.04:-:lts"); script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:19.10"); script_set_attribute(attribute:"vuln_publication_date", value:"2020/04/13"); script_set_attribute(attribute:"patch_publication_date", value:"2020/04/09"); script_set_attribute(attribute:"plugin_publication_date", value:"2020/04/10"); script_set_attribute(attribute:"generated_plugin", value:"current"); script_set_attribute(attribute:"stig_severity", value:"I"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"Ubuntu Security Notice (C) 2020 Canonical, Inc. / NASL script (C) 2020 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:"^(18\.04|19\.10)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 18.04 / 19.10", "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:"18.04", pkgname:"libssh-4", pkgver:"0.8.0~20170825.94fa1e38-1ubuntu0.6")) flag++; if (ubuntu_check(osver:"19.10", pkgname:"libssh-4", pkgver:"0.9.0-1ubuntu1.4")) 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, "libssh-4"); }
NASL family SuSE Local Security Checks NASL id SUSE_SU-2020-0968-1.NASL description This update for libssh fixes the following issues : CVE-2020-1730: Fixed a possible denial of service when using AES-CTR (bsc#1168699). 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 seen 2020-05-16 modified 2020-04-10 plugin id 135393 published 2020-04-10 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/135393 title SUSE SLES12 Security Update : libssh (SUSE-SU-2020:0968-1) code # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from SUSE update advisory SUSE-SU-2020:0968-1. # The text itself is copyright (C) SUSE. # include("compat.inc"); if (description) { script_id(135393); script_version("1.5"); script_set_attribute(attribute:"plugin_modification_date", value:"2020/07/14"); script_cve_id("CVE-2020-1730"); script_xref(name:"IAVA", value:"2020-A-0203"); script_name(english:"SUSE SLES12 Security Update : libssh (SUSE-SU-2020:0968-1)"); script_summary(english:"Checks rpm output for the updated packages."); script_set_attribute( attribute:"synopsis", value:"The remote SUSE host is missing one or more security updates." ); script_set_attribute( attribute:"description", value: "This update for libssh fixes the following issues : CVE-2020-1730: Fixed a possible denial of service when using AES-CTR (bsc#1168699). 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." ); script_set_attribute( attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1168699" ); script_set_attribute( attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2020-1730/" ); # https://www.suse.com/support/update/announcement/2020/suse-su-20200968-1/ script_set_attribute( attribute:"see_also", value:"http://www.nessus.org/u?3225abed" ); script_set_attribute( attribute:"solution", value: "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or 'zypper patch'. Alternatively you can run the command listed for your product : SUSE Linux Enterprise Software Development Kit 12-SP5:zypper in -t patch SUSE-SLE-SDK-12-SP5-2020-968=1 SUSE Linux Enterprise Server 12-SP5:zypper in -t patch SUSE-SLE-SERVER-12-SP5-2020-968=1" ); script_set_cvss_base_vector("CVSS2#AV:N/AC:L/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:N/S:U/C:N/I:N/A:L"); script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C"); script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-1730"); 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:novell:suse_linux:libssh-debugsource"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:libssh4"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:libssh4-debuginfo"); script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:suse_linux:12"); script_set_attribute(attribute:"vuln_publication_date", value:"2020/04/13"); script_set_attribute(attribute:"patch_publication_date", value:"2020/04/09"); script_set_attribute(attribute:"plugin_publication_date", value:"2020/04/10"); script_set_attribute(attribute:"generated_plugin", value:"current"); script_set_attribute(attribute:"stig_severity", value:"I"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof."); script_family(english:"SuSE Local Security Checks"); script_dependencies("ssh_get_info.nasl"); script_require_keys("Host/local_checks_enabled", "Host/cpu", "Host/SuSE/release", "Host/SuSE/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/SuSE/release"); if (isnull(release) || release !~ "^(SLED|SLES)") audit(AUDIT_OS_NOT, "SUSE"); os_ver = pregmatch(pattern: "^(SLE(S|D)\d+)", string:release); if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "SUSE"); os_ver = os_ver[1]; if (! preg(pattern:"^(SLES12)$", string:os_ver)) audit(AUDIT_OS_NOT, "SUSE SLES12", "SUSE " + os_ver); if (!get_kb_item("Host/SuSE/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING); cpu = get_kb_item("Host/cpu"); if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH); if (cpu !~ "^i[3-6]86$" && "x86_64" >!< cpu && "s390x" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "SUSE " + os_ver, cpu); sp = get_kb_item("Host/SuSE/patchlevel"); if (isnull(sp)) sp = "0"; if (os_ver == "SLES12" && (! preg(pattern:"^(5)$", string:sp))) audit(AUDIT_OS_NOT, "SLES12 SP5", os_ver + " SP" + sp); flag = 0; if (rpm_check(release:"SLES12", sp:"5", reference:"libssh-debugsource-0.8.7-3.9.1")) flag++; if (rpm_check(release:"SLES12", sp:"5", reference:"libssh4-0.8.7-3.9.1")) flag++; if (rpm_check(release:"SLES12", sp:"5", reference:"libssh4-debuginfo-0.8.7-3.9.1")) flag++; if (rpm_check(release:"SLES12", sp:"5", reference:"libssh4-32bit-0.8.7-3.9.1")) flag++; if (rpm_check(release:"SLES12", sp:"5", reference:"libssh4-debuginfo-32bit-0.8.7-3.9.1")) flag++; if (flag) { if (report_verbosity > 0) security_warning(port:0, extra:rpm_report_get()); else security_warning(0); exit(0); } else { tested = pkg_tests_get(); if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested); else audit(AUDIT_PACKAGE_NOT_INSTALLED, "libssh"); }
NASL family FreeBSD Local Security Checks NASL id FREEBSD_PKG_3D7DFD63823B11EAB3A8240A644DD835.NASL description The libssh team reports (originally reported by Yasheng Yang from Google) : A malicious client or server could crash the counterpart implemented with libssh AES-CTR ciphers are used and don last seen 2020-05-16 modified 2020-04-21 plugin id 135795 published 2020-04-21 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/135795 title FreeBSD : Client/server denial of service when handling AES-CTR ciphers (3d7dfd63-823b-11ea-b3a8-240a644dd835) code # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from the FreeBSD VuXML database : # # Copyright 2003-2020 Jacques Vidrine and contributors # # Redistribution and use in source (VuXML) and 'compiled' forms (SGML, # HTML, PDF, PostScript, RTF and so forth) with or without modification, # are permitted provided that the following conditions are met: # 1. Redistributions of source code (VuXML) must retain the above # copyright notice, this list of conditions and the following # disclaimer as the first lines of this file unmodified. # 2. Redistributions in compiled form (transformed to other DTDs, # published online in any format, converted to PDF, PostScript, # RTF and other formats) must reproduce the above copyright # notice, this list of conditions and the following disclaimer # in the documentation and/or other materials provided with the # distribution. # # THIS DOCUMENTATION IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "AS IS" # AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, # THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR # PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS # BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, # OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT # OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR # BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, # WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE # OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS DOCUMENTATION, # EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. # include("compat.inc"); if (description) { script_id(135795); script_version("1.4"); script_set_attribute(attribute:"plugin_modification_date", value:"2020/07/14"); script_cve_id("CVE-2020-1730"); script_xref(name:"IAVA", value:"2020-A-0203"); script_name(english:"FreeBSD : Client/server denial of service when handling AES-CTR ciphers (3d7dfd63-823b-11ea-b3a8-240a644dd835)"); script_summary(english:"Checks for updated packages in pkg_info output"); script_set_attribute( attribute:"synopsis", value: "The remote FreeBSD host is missing one or more security-related updates." ); script_set_attribute( attribute:"description", value: "The libssh team reports (originally reported by Yasheng Yang from Google) : A malicious client or server could crash the counterpart implemented with libssh AES-CTR ciphers are used and don't get fully initialized. It will crash when it tries to cleanup the AES-CTR ciphers when closing the connection." ); script_set_attribute( attribute:"see_also", value:"https://www.libssh.org/security/advisories/CVE-2020-1730.txt" ); # https://vuxml.freebsd.org/freebsd/3d7dfd63-823b-11ea-b3a8-240a644dd835.html script_set_attribute( attribute:"see_also", value:"http://www.nessus.org/u?fb05dade" ); script_set_attribute(attribute:"solution", value:"Update the affected packages."); script_set_cvss_base_vector("CVSS2#AV:N/AC:L/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:N/S:U/C:N/I:N/A:L"); script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C"); script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-1730"); 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:freebsd:freebsd:libssh"); script_set_attribute(attribute:"cpe", value:"cpe:/o:freebsd:freebsd"); script_set_attribute(attribute:"vuln_publication_date", value:"2020/01/25"); script_set_attribute(attribute:"patch_publication_date", value:"2020/04/19"); script_set_attribute(attribute:"plugin_publication_date", value:"2020/04/21"); script_set_attribute(attribute:"generated_plugin", value:"current"); script_set_attribute(attribute:"stig_severity", value:"I"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof."); script_family(english:"FreeBSD Local Security Checks"); script_dependencies("ssh_get_info.nasl"); script_require_keys("Host/local_checks_enabled", "Host/FreeBSD/release", "Host/FreeBSD/pkg_info"); exit(0); } include("audit.inc"); include("freebsd_package.inc"); if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED); if (!get_kb_item("Host/FreeBSD/release")) audit(AUDIT_OS_NOT, "FreeBSD"); if (!get_kb_item("Host/FreeBSD/pkg_info")) audit(AUDIT_PACKAGE_LIST_MISSING); flag = 0; if (pkg_test(save_report:TRUE, pkg:"libssh>=0.8.0<0.8.9")) flag++; if (pkg_test(save_report:TRUE, pkg:"libssh>=0.9.0<0.9.4")) flag++; if (flag) { if (report_verbosity > 0) security_warning(port:0, extra:pkg_report_get()); else security_warning(0); exit(0); } else audit(AUDIT_HOST_NOT, "affected");
References
- https://www.libssh.org/security/advisories/CVE-2020-1730.txt
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-1730
- https://usn.ubuntu.com/4327-1/
- https://security.netapp.com/advisory/ntap-20200424-0001/
- https://www.oracle.com/security-alerts/cpuoct2020.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VLSWHBQ3EPKGTGLQNH554Z746BJ3C554/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2A7BIFKUYIYKTY7FX4BEWVC2OHS5DPOU/