Vulnerabilities > CVE-2019-9898 - Use of Insufficiently Random Values vulnerability in multiple products
Attack vector
NETWORK Attack complexity
LOW Privileges required
NONE Confidentiality impact
HIGH Integrity impact
HIGH Availability impact
HIGH Summary
Potential recycling of random numbers used in cryptography exists within PuTTY before 0.71.
Vulnerable Configurations
Part | Description | Count |
---|---|---|
Application | Putty
| 28 |
Application | 1 | |
OS | 2 | |
OS | 2 | |
OS | 1 |
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Brute Force In this attack, some asset (information, functionality, identity, etc.) is protected by a finite secret value. The attacker attempts to gain access to this asset by using trial-and-error to exhaustively explore all the possible secret values in the hope of finding the secret (or a value that is functionally equivalent) that will unlock the asset. Examples of secrets can include, but are not limited to, passwords, encryption keys, database lookup keys, and initial values to one-way functions. The key factor in this attack is the attackers' ability to explore the possible secret space rapidly. This, in turn, is a function of the size of the secret space and the computational power the attacker is able to bring to bear on the problem. If the attacker has modest resources and the secret space is large, the challenge facing the attacker is intractable. While the defender cannot control the resources available to an attacker, they can control the size of the secret space. Creating a large secret space involves selecting one's secret from as large a field of equally likely alternative secrets as possible and ensuring that an attacker is unable to reduce the size of this field using available clues or cryptanalysis. Doing this is more difficult than it sounds since elimination of patterns (which, in turn, would provide an attacker clues that would help them reduce the space of potential secrets) is difficult to do using deterministic machines, such as computers. Assuming a finite secret space, a brute force attack will eventually succeed. The defender must rely on making sure that the time and resources necessary to do so will exceed the value of the information. For example, a secret space that will likely take hundreds of years to explore is likely safe from raw-brute force attacks.
- Signature Spoofing by Key Recreation An attacker obtains an authoritative or reputable signer's private signature key by exploiting a cryptographic weakness in the signature algorithm or pseudorandom number generation and then uses this key to forge signatures from the original signer to mislead a victim into performing actions that benefit the attacker.
- Session Credential Falsification through Prediction This attack targets predictable session ID in order to gain privileges. The attacker can predict the session ID used during a transaction to perform spoofing and session hijacking.
Nessus
NASL family Fedora Local Security Checks NASL id FEDORA_2019-5776DFE300.NASL description This is new version of putty. 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 2020-06-01 modified 2020-06-02 plugin id 123139 published 2019-03-27 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/123139 title Fedora 29 : putty (2019-5776dfe300) code # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from Fedora Security Advisory FEDORA-2019-5776dfe300. # include("compat.inc"); if (description) { script_id(123139); script_version("1.4"); script_cvs_date("Date: 2020/02/03"); script_cve_id("CVE-2019-9894", "CVE-2019-9895", "CVE-2019-9897", "CVE-2019-9898"); script_xref(name:"FEDORA", value:"2019-5776dfe300"); script_name(english:"Fedora 29 : putty (2019-5776dfe300)"); 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: "This is new version of putty. Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues." ); script_set_attribute( attribute:"see_also", value:"https://bodhi.fedoraproject.org/updates/FEDORA-2019-5776dfe300" ); script_set_attribute(attribute:"solution", value:"Update the affected putty package."); script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P"); script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C"); script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"); script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C"); script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fedoraproject:fedora:putty"); script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:29"); script_set_attribute(attribute:"vuln_publication_date", value:"2019/03/21"); script_set_attribute(attribute:"patch_publication_date", value:"2019/03/27"); script_set_attribute(attribute:"plugin_publication_date", value:"2019/03/27"); script_set_attribute(attribute:"generated_plugin", value:"current"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 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:"putty-0.71-1.fc29")) flag++; if (flag) { security_report_v4( port : 0, severity : SECURITY_HOLE, extra : rpm_report_get() ); exit(0); } else { tested = pkg_tests_get(); if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested); else audit(AUDIT_PACKAGE_NOT_INSTALLED, "putty"); }
NASL family SuSE Local Security Checks NASL id OPENSUSE-2019-1113.NASL description This update for putty fixes the following issues : Update to new upstream release 0.71 [boo#1129633] - CVE-2019-9894: Fixed a remotely triggerable memory overwrite in RSA key exchange, which can occur before host key verification potential recycling of random numbers used in cryptography. - CVE-2019-9895: Fixed a remotely triggerable buffer overflow in any kind of server-to-client forwarding. - CVE-2019-9897: Fixed multiple denial-of-service attacks that can be triggered by writing to the terminal. - CVE-2019-9898: Fixed potential recycling of random numbers used in cryptography - CVE-2019-9896 (Windows only): Fixed hijacking by a malicious help file in the same directory as the executable - Major rewrite of the crypto code to remove cache and timing side channels. last seen 2020-06-01 modified 2020-06-02 plugin id 123660 published 2019-04-03 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/123660 title openSUSE Security Update : putty (openSUSE-2019-1113) code # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from openSUSE Security Update openSUSE-2019-1113. # # The text description of this plugin is (C) SUSE LLC. # include("compat.inc"); if (description) { script_id(123660); script_version("1.2"); script_cvs_date("Date: 2020/01/27"); script_cve_id("CVE-2019-9894", "CVE-2019-9895", "CVE-2019-9896", "CVE-2019-9897", "CVE-2019-9898"); script_name(english:"openSUSE Security Update : putty (openSUSE-2019-1113)"); script_summary(english:"Check for the openSUSE-2019-1113 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 putty fixes the following issues : Update to new upstream release 0.71 [boo#1129633] - CVE-2019-9894: Fixed a remotely triggerable memory overwrite in RSA key exchange, which can occur before host key verification potential recycling of random numbers used in cryptography. - CVE-2019-9895: Fixed a remotely triggerable buffer overflow in any kind of server-to-client forwarding. - CVE-2019-9897: Fixed multiple denial-of-service attacks that can be triggered by writing to the terminal. - CVE-2019-9898: Fixed potential recycling of random numbers used in cryptography - CVE-2019-9896 (Windows only): Fixed hijacking by a malicious help file in the same directory as the executable - Major rewrite of the crypto code to remove cache and timing side channels." ); script_set_attribute( attribute:"see_also", value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1129633" ); script_set_attribute( attribute:"solution", value:"Update the affected putty packages." ); script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P"); script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C"); script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"); script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C"); script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:putty"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:putty-debuginfo"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:putty-debugsource"); script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:opensuse:15.0"); script_set_attribute(attribute:"vuln_publication_date", value:"2019/03/21"); script_set_attribute(attribute:"patch_publication_date", value:"2019/04/02"); script_set_attribute(attribute:"plugin_publication_date", value:"2019/04/03"); 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:"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\.0)$") audit(AUDIT_OS_RELEASE_NOT, "openSUSE", "15.0", release); if (!get_kb_item("Host/SuSE/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING); ourarch = get_kb_item("Host/cpu"); if (!ourarch) audit(AUDIT_UNKNOWN_ARCH); if (ourarch !~ "^(x86_64)$") audit(AUDIT_ARCH_NOT, "x86_64", ourarch); flag = 0; if ( rpm_check(release:"SUSE15.0", reference:"putty-0.71-lp150.9.1") ) flag++; if ( rpm_check(release:"SUSE15.0", reference:"putty-debuginfo-0.71-lp150.9.1") ) flag++; if ( rpm_check(release:"SUSE15.0", reference:"putty-debugsource-0.71-lp150.9.1") ) 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, "putty / putty-debuginfo / putty-debugsource"); }
NASL family Debian Local Security Checks NASL id DEBIAN_DSA-4423.NASL description Multiple vulnerabilities were found in the PuTTY SSH client, which could result in denial of service and potentially the execution of arbitrary code. In addition, in some situations random numbers could potentially be re-used. last seen 2020-06-01 modified 2020-06-02 plugin id 123692 published 2019-04-04 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/123692 title Debian DSA-4423-1 : putty - security update code # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from Debian Security Advisory DSA-4423. The text # itself is copyright (C) Software in the Public Interest, Inc. # include("compat.inc"); if (description) { script_id(123692); script_version("1.2"); script_cvs_date("Date: 2020/01/27"); script_cve_id("CVE-2019-9894", "CVE-2019-9895", "CVE-2019-9897", "CVE-2019-9898"); script_xref(name:"DSA", value:"4423"); script_name(english:"Debian DSA-4423-1 : putty - 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: "Multiple vulnerabilities were found in the PuTTY SSH client, which could result in denial of service and potentially the execution of arbitrary code. In addition, in some situations random numbers could potentially be re-used." ); script_set_attribute( attribute:"see_also", value:"https://security-tracker.debian.org/tracker/source-package/putty" ); script_set_attribute( attribute:"see_also", value:"https://packages.debian.org/source/stretch/putty" ); script_set_attribute( attribute:"see_also", value:"https://www.debian.org/security/2019/dsa-4423" ); script_set_attribute( attribute:"solution", value: "Upgrade the putty packages. For the stable distribution (stretch), these problems have been fixed in version 0.67-3+deb9u1." ); script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P"); script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C"); script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"); script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C"); script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:putty"); script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:9.0"); script_set_attribute(attribute:"vuln_publication_date", value:"2019/03/21"); script_set_attribute(attribute:"patch_publication_date", value:"2019/04/03"); script_set_attribute(attribute:"plugin_publication_date", value:"2019/04/04"); 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:"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:"pterm", reference:"0.67-3+deb9u1")) flag++; if (deb_check(release:"9.0", prefix:"putty", reference:"0.67-3+deb9u1")) flag++; if (deb_check(release:"9.0", prefix:"putty-doc", reference:"0.67-3+deb9u1")) flag++; if (deb_check(release:"9.0", prefix:"putty-tools", reference:"0.67-3+deb9u1")) 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 family Fedora Local Security Checks NASL id FEDORA_2019-9E1A1CD634.NASL description This is new version of putty fixing few security vulnerabilities. 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 2020-06-01 modified 2020-06-02 plugin id 123479 published 2019-03-29 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/123479 title Fedora 28 : putty (2019-9e1a1cd634) code # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from Fedora Security Advisory FEDORA-2019-9e1a1cd634. # include("compat.inc"); if (description) { script_id(123479); script_version("1.4"); script_cvs_date("Date: 2020/01/27"); script_cve_id("CVE-2019-9894", "CVE-2019-9895", "CVE-2019-9897", "CVE-2019-9898"); script_xref(name:"FEDORA", value:"2019-9e1a1cd634"); script_name(english:"Fedora 28 : putty (2019-9e1a1cd634)"); 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: "This is new version of putty fixing few security vulnerabilities. Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues." ); script_set_attribute( attribute:"see_also", value:"https://bodhi.fedoraproject.org/updates/FEDORA-2019-9e1a1cd634" ); script_set_attribute(attribute:"solution", value:"Update the affected putty package."); script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P"); script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C"); script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"); script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C"); script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fedoraproject:fedora:putty"); script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:28"); script_set_attribute(attribute:"vuln_publication_date", value:"2019/03/21"); script_set_attribute(attribute:"patch_publication_date", value:"2019/03/29"); script_set_attribute(attribute:"plugin_publication_date", value:"2019/03/29"); 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:"^28([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Fedora 28", "Fedora " + os_ver); if (!get_kb_item("Host/RedHat/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING); cpu = get_kb_item("Host/cpu"); if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH); if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Fedora", cpu); flag = 0; if (rpm_check(release:"FC28", reference:"putty-0.71-1.fc28")) flag++; if (flag) { security_report_v4( port : 0, severity : SECURITY_HOLE, extra : rpm_report_get() ); exit(0); } else { tested = pkg_tests_get(); if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested); else audit(AUDIT_PACKAGE_NOT_INSTALLED, "putty"); }
NASL family Debian Local Security Checks NASL id DEBIAN_DLA-1763.NASL description Multiple vulnerabilities were found in the PuTTY SSH client, which could result in denial of service and potentially the execution of arbitrary code. In addition, in some situations random numbers could potentially be re-used. For Debian 8 last seen 2020-06-01 modified 2020-06-02 plugin id 124283 published 2019-04-25 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/124283 title Debian DLA-1763-1 : putty security update code # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from Debian Security Advisory DLA-1763-1. The text # itself is copyright (C) Software in the Public Interest, Inc. # include("compat.inc"); if (description) { script_id(124283); script_version("1.2"); script_cvs_date("Date: 2020/01/23"); script_cve_id("CVE-2019-9894", "CVE-2019-9897", "CVE-2019-9898"); script_name(english:"Debian DLA-1763-1 : putty 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: "Multiple vulnerabilities were found in the PuTTY SSH client, which could result in denial of service and potentially the execution of arbitrary code. In addition, in some situations random numbers could potentially be re-used. For Debian 8 'Jessie', these problems have been fixed in version 0.63-10+deb8u2. We recommend that you upgrade your putty 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/2019/04/msg00023.html" ); script_set_attribute( attribute:"see_also", value:"https://packages.debian.org/source/jessie/putty" ); script_set_attribute(attribute:"solution", value:"Upgrade the affected packages."); script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P"); script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C"); script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"); script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C"); script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:pterm"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:putty"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:putty-doc"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:putty-tools"); script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:8.0"); script_set_attribute(attribute:"vuln_publication_date", value:"2019/03/21"); script_set_attribute(attribute:"patch_publication_date", value:"2019/04/24"); script_set_attribute(attribute:"plugin_publication_date", value:"2019/04/25"); 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:"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:"pterm", reference:"0.63-10+deb8u2")) flag++; if (deb_check(release:"8.0", prefix:"putty", reference:"0.63-10+deb8u2")) flag++; if (deb_check(release:"8.0", prefix:"putty-doc", reference:"0.63-10+deb8u2")) flag++; if (deb_check(release:"8.0", prefix:"putty-tools", reference:"0.63-10+deb8u2")) 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 family Windows NASL id PUTTY_071.NASL description The remote host has a version of PuTTY installed that is prior to 0.71. It is, therefore, affected by multiple vulnerabilities including: - A remotely triggerable buffer overflow in any kind of server-to-client forwarding. (CVE-2019-9895) - Potential recycling of random numbers used in cryptography. (CVE-2019-9898) - A remotely triggerable memory overwrite in RSA key exchange can occur before host key verification. (CVE-2019-9894) last seen 2020-06-01 modified 2020-06-02 plugin id 123418 published 2019-03-27 reporter This script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/123418 title PuTTY < 0.71 Multiple Vulnerabilities code # # (C) Tenable Network Security, Inc. # include("compat.inc"); if (description) { script_id(123418); script_version("1.2"); script_cvs_date("Date: 2019/10/30 13:24:47"); script_cve_id( "CVE-2019-9894", "CVE-2019-9895", "CVE-2019-9896", "CVE-2019-9897", "CVE-2019-9898" ); script_bugtraq_id( 107484, 107523 ); script_name(english:"PuTTY < 0.71 Multiple Vulnerabilities"); script_summary(english:"Checks the version of PuTTY."); script_set_attribute(attribute:"synopsis", value: "The remote Windows host has an SSH client that is affected by multiple vulnerabilities."); script_set_attribute(attribute:"description", value: "The remote host has a version of PuTTY installed that is prior to 0.71. It is, therefore, affected by multiple vulnerabilities including: - A remotely triggerable buffer overflow in any kind of server-to-client forwarding. (CVE-2019-9895) - Potential recycling of random numbers used in cryptography. (CVE-2019-9898) - A remotely triggerable memory overwrite in RSA key exchange can occur before host key verification. (CVE-2019-9894)"); # https://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-auth-prompt-spoofing.html script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?fc188a9c"); # https://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-chm-hijack.html script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?cd82820f"); # https://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-fd-set-overflow.html script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?e116cf63"); # https://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-rng-reuse.html script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?39988fba"); # https://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-rsa-kex-integer-overflow.html script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?50d03d73"); # https://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-terminal-dos-combining-chars.html script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?dc4b5e69"); # https://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-terminal-dos-combining-chars-double-width-gtk.html script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?d52aebfd"); # https://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-terminal-dos-one-column-cjk.html script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?819250a8"); script_set_attribute(attribute:"see_also", value:"http://www.chiark.greenend.org.uk/~sgtatham/putty/changes.html"); script_set_attribute(attribute:"solution", value:"Upgrade to PuTTY version 0.71 or later."); script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P"); script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C"); script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"); script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C"); script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-9895"); script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available"); script_set_attribute(attribute:"vuln_publication_date", value:"2019/03/16"); script_set_attribute(attribute:"patch_publication_date", value:"2019/03/16"); script_set_attribute(attribute:"plugin_publication_date", value:"2019/03/27"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"cpe:/a:simon_tatham:putty"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_family(english:"Windows"); script_copyright(english:"This script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof."); script_dependencies("putty_installed.nasl"); script_require_keys("installed_sw/PuTTY", "SMB/Registry/Enumerated"); exit(0); } include("vcf.inc"); get_kb_item_or_exit("SMB/Registry/Enumerated"); app_info = vcf::get_app_info(app:"PuTTY", win_local:TRUE); constraints = [ { "fixed_version" : "0.71" } ]; vcf::check_version_and_report(app_info:app_info, constraints:constraints, severity:SECURITY_HOLE);
References
- https://www.chiark.greenend.org.uk/~sgtatham/putty/changes.html
- http://www.securityfocus.com/bid/107523
- https://security.netapp.com/advisory/ntap-20190401-0002/
- https://security.netapp.com/advisory/ntap-20190329-0002/
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00004.html
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00020.html
- https://seclists.org/bugtraq/2019/Apr/6
- https://www.debian.org/security/2019/dsa-4423
- https://lists.debian.org/debian-lts-announce/2019/04/msg00023.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LDO3F267P347E6U2IILFCYW7JPTLCCES/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/36LWQ3NPFIV7DC7TC4KFPRYRH2OR7SZ2/