Vulnerabilities > CVE-2016-7076 - Command Injection vulnerability in Sudo Project Sudo
Attack vector
LOCAL Attack complexity
LOW Privileges required
LOW Confidentiality impact
HIGH Integrity impact
HIGH Availability impact
HIGH Summary
sudo before version 1.8.18p1 is vulnerable to a bypass in the sudo noexec restriction if application run via sudo executed wordexp() C library function with a user supplied argument. A local user permitted to run such application via sudo with noexec restriction could possibly use this flaw to execute arbitrary commands with elevated privileges.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Cause Web Server Misclassification An attack of this type exploits a Web server's decision to take action based on filename or file extension. Because different file types are handled by different server processes, misclassification may force the Web server to take unexpected action, or expected actions in an unexpected sequence. This may cause the server to exhaust resources, supply debug or system data to the attacker, or bind an attacker to a remote process. This type of vulnerability has been found in many widely used servers including IIS, Lotus Domino, and Orion. The attacker's job in this case is straightforward, standard communication protocols and methods are used and are generally appended with malicious information at the tail end of an otherwise legitimate request. The attack payload varies, but it could be special characters like a period or simply appending a tag that has a special meaning for operations on the server side like .jsp for a java application server. The essence of this attack is that the attacker deceives the server into executing functionality based on the name of the request, i.e. login.jsp, not the contents.
- LDAP Injection An attacker manipulates or crafts an LDAP query for the purpose of undermining the security of the target. Some applications use user input to create LDAP queries that are processed by an LDAP server. For example, a user might provide their username during authentication and the username might be inserted in an LDAP query during the authentication process. An attacker could use this input to inject additional commands into an LDAP query that could disclose sensitive information. For example, entering a * in the aforementioned query might return information about all users on the system. This attack is very similar to an SQL injection attack in that it manipulates a query to gather additional information or coerce a particular return value.
- Command Delimiters An attack of this type exploits a programs' vulnerabilities that allows an attacker's commands to be concatenated onto a legitimate command with the intent of targeting other resources such as the file system or database. The system that uses a filter or a blacklist input validation, as opposed to whitelist validation is vulnerable to an attacker who predicts delimiters (or combinations of delimiters) not present in the filter or blacklist. As with other injection attacks, the attacker uses the command delimiter payload as an entry point to tunnel through the application and activate additional attacks through SQL queries, shell commands, network scanning, and so on.
- File System Function Injection, Content Based An attack of this type exploits the host's trust in executing remote content including binary files. The files are poisoned with a malicious payload (targeting the file systems accessible by the target software) by the attacker and may be passed through standard channels such as via email, and standard web content like PDF and multimedia files. The attacker exploits known vulnerabilities or handling routines in the target processes. Vulnerabilities of this type have been found in a wide variety of commercial applications from Microsoft Office to Adobe Acrobat and Apple Safari web browser. When the attacker knows the standard handling routines and can identify vulnerabilities and entry points they can be exploited by otherwise seemingly normal content. Once the attack is executed, the attackers' program can access relative directories such as C:\Program Files or other standard system directories to launch further attacks. In a worst case scenario, these programs are combined with other propagation logic and work as a virus.
- Exploiting Multiple Input Interpretation Layers An attacker supplies the target software with input data that contains sequences of special characters designed to bypass input validation logic. This exploit relies on the target making multiples passes over the input data and processing a "layer" of special characters with each pass. In this manner, the attacker can disguise input that would otherwise be rejected as invalid by concealing it with layers of special/escape characters that are stripped off by subsequent processing steps. The goal is to first discover cases where the input validation layer executes before one or more parsing layers. That is, user input may go through the following logic in an application: In such cases, the attacker will need to provide input that will pass through the input validator, but after passing through parser2, will be converted into something that the input validator was supposed to stop.
Nessus
NASL family Virtuozzo Local Security Checks NASL id VIRTUOZZO_VZLSA-2016-2872.NASL description An update for sudo is now available for Red Hat Enterprise Linux 6 and Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. The sudo packages contain the sudo utility which allows system administrators to provide certain users with the permission to execute privileged commands, which are used for system management purposes, without having to log in as root. Security Fix(es) : * It was discovered that the sudo noexec restriction could have been bypassed if application run via sudo executed system(), popen(), or wordexp() C library functions with a user-supplied argument. A local user permitted to run such application via sudo with noexec restriction could use these flaws to execute arbitrary commands with elevated privileges. (CVE-2016-7032, CVE-2016-7076) These issues were discovered by Florian Weimer (Red Hat). Note that Tenable Network Security has attempted to extract the preceding description block directly from the corresponding Red Hat security advisory. Virtuozzo provides no description for VZLSA advisories. 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 101533 published 2017-07-14 reporter This script is Copyright (C) 2017-2018 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/101533 title Virtuozzo 7 : sudo / sudo-devel (VZLSA-2016-2872) code # # (C) Tenable Network Security, Inc. # include("compat.inc"); if (description) { script_id(101533); script_version("3.9"); script_cvs_date("Date: 2018/11/20 11:04:17"); script_cve_id( "CVE-2016-7032", "CVE-2016-7076" ); script_name(english:"Virtuozzo 7 : sudo / sudo-devel (VZLSA-2016-2872)"); script_summary(english:"Checks the rpm output for the updated package."); script_set_attribute(attribute:"synopsis", value: "The remote Virtuozzo host is missing a security update."); script_set_attribute(attribute:"description", value: "An update for sudo is now available for Red Hat Enterprise Linux 6 and Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. The sudo packages contain the sudo utility which allows system administrators to provide certain users with the permission to execute privileged commands, which are used for system management purposes, without having to log in as root. Security Fix(es) : * It was discovered that the sudo noexec restriction could have been bypassed if application run via sudo executed system(), popen(), or wordexp() C library functions with a user-supplied argument. A local user permitted to run such application via sudo with noexec restriction could use these flaws to execute arbitrary commands with elevated privileges. (CVE-2016-7032, CVE-2016-7076) These issues were discovered by Florian Weimer (Red Hat). Note that Tenable Network Security has attempted to extract the preceding description block directly from the corresponding Red Hat security advisory. Virtuozzo provides no description for VZLSA advisories. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues."); # http://repo.virtuozzo.com/vzlinux/announcements/json/VZLSA-2016-2872.json script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?b96edd6e"); script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/errata/RHSA-2016-2872"); script_set_attribute(attribute:"solution", value: "Update the affected sudo / sudo-devel package."); script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C"); script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C"); script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/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:"patch_publication_date", value:"2017/06/22"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:virtuozzo:virtuozzo:sudo"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:virtuozzo:virtuozzo:sudo-devel"); script_set_attribute(attribute:"cpe", value:"cpe:/o:virtuozzo:virtuozzo:7"); script_set_attribute(attribute:"plugin_publication_date", value:"2017/07/14"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_family(english:"Virtuozzo Local Security Checks"); script_copyright(english:"This script is Copyright (C) 2017-2018 and is owned by Tenable, Inc. or an Affiliate thereof."); script_dependencies("ssh_get_info.nasl"); script_require_keys("Host/local_checks_enabled", "Host/Virtuozzo/release", "Host/Virtuozzo/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/Virtuozzo/release"); if (isnull(release) || "Virtuozzo" >!< release) audit(AUDIT_OS_NOT, "Virtuozzo"); os_ver = pregmatch(pattern: "Virtuozzo Linux release ([0-9]+\.[0-9])(\D|$)", string:release); if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Virtuozzo"); os_ver = os_ver[1]; if (! preg(pattern:"^7([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Virtuozzo 7.x", "Virtuozzo " + os_ver); if (!get_kb_item("Host/Virtuozzo/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, "Virtuozzo", cpu); flag = 0; pkgs = ["sudo-1.8.6p7-21.vl7", "sudo-devel-1.8.6p7-21.vl7"]; foreach (pkg in pkgs) if (rpm_check(release:"Virtuozzo-7", reference:pkg)) 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, "sudo / sudo-devel"); }NASL family Huawei Local Security Checks NASL id EULEROS_SA-2017-1004.NASL description According to the versions of the sudo package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : - It was discovered that the sudo noexec restriction could have been bypassed if application run via sudo executed system(), popen(), or wordexp() C library functions with a user-supplied argument. A local user permitted to run such application via sudo with noexec restriction could use these flaws to execute arbitrary commands with elevated privileges. (CVE-2016-7032, CVE-2016-7076) 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. last seen 2020-05-06 modified 2017-05-01 plugin id 99851 published 2017-05-01 reporter This script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/99851 title EulerOS 2.0 SP1 : sudo (EulerOS-SA-2017-1004) code # # (C) Tenable Network Security, Inc. # include("compat.inc"); if (description) { script_id(99851); script_version("1.15"); script_set_attribute(attribute:"plugin_modification_date", value:"2020/05/04"); script_cve_id( "CVE-2016-7032", "CVE-2016-7076" ); script_name(english:"EulerOS 2.0 SP1 : sudo (EulerOS-SA-2017-1004)"); script_summary(english:"Checks the rpm output for the updated packages."); script_set_attribute(attribute:"synopsis", value: "The remote EulerOS host is missing multiple security updates."); script_set_attribute(attribute:"description", value: "According to the versions of the sudo package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : - It was discovered that the sudo noexec restriction could have been bypassed if application run via sudo executed system(), popen(), or wordexp() C library functions with a user-supplied argument. A local user permitted to run such application via sudo with noexec restriction could use these flaws to execute arbitrary commands with elevated privileges. (CVE-2016-7032, CVE-2016-7076) 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-2017-1004 script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?35ccf9f4"); script_set_attribute(attribute:"solution", value: "Update the affected sudo packages."); script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C"); script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C"); script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/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:"patch_publication_date", value:"2017/01/07"); script_set_attribute(attribute:"plugin_publication_date", value:"2017/05/01"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:sudo"); script_set_attribute(attribute:"cpe", value:"cpe:/o:huawei:euleros:2.0"); script_set_attribute(attribute:"generated_plugin", value:"current"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_family(english:"Huawei Local Security Checks"); script_copyright(english:"This script is Copyright (C) 2017-2020 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 !~ "^(1)$") audit(AUDIT_OS_NOT, "EulerOS 2.0 SP1"); uvp = get_kb_item("Host/EulerOS/uvp_version"); if (!empty_or_null(uvp)) audit(AUDIT_OS_NOT, "EulerOS 2.0 SP1", "EulerOS UVP " + uvp); if (!get_kb_item("Host/EulerOS/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING); cpu = get_kb_item("Host/cpu"); if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH); if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$" && "aarch64" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "EulerOS", cpu); if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_ARCH_NOT, "i686 / x86_64", cpu); flag = 0; pkgs = ["sudo-1.8.6p7-21.h2"]; foreach (pkg in pkgs) if (rpm_check(release:"EulerOS-2.0", sp:"1", reference:pkg)) 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, "sudo"); }NASL family Oracle Linux Local Security Checks NASL id ORACLELINUX_ELSA-2016-2872.NASL description From Red Hat Security Advisory 2016:2872 : An update for sudo is now available for Red Hat Enterprise Linux 6 and Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. The sudo packages contain the sudo utility which allows system administrators to provide certain users with the permission to execute privileged commands, which are used for system management purposes, without having to log in as root. Security Fix(es) : * It was discovered that the sudo noexec restriction could have been bypassed if application run via sudo executed system(), popen(), or wordexp() C library functions with a user-supplied argument. A local user permitted to run such application via sudo with noexec restriction could use these flaws to execute arbitrary commands with elevated privileges. (CVE-2016-7032, CVE-2016-7076) These issues were discovered by Florian Weimer (Red Hat). last seen 2020-06-01 modified 2020-06-02 plugin id 95598 published 2016-12-07 reporter This script is Copyright (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/95598 title Oracle Linux 6 / 7 : sudo (ELSA-2016-2872) code # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from Red Hat Security Advisory RHSA-2016:2872 and # Oracle Linux Security Advisory ELSA-2016-2872 respectively. # include("compat.inc"); if (description) { script_id(95598); script_version("3.7"); script_cvs_date("Date: 2019/09/27 13:00:37"); script_cve_id("CVE-2016-7032", "CVE-2016-7076"); script_xref(name:"RHSA", value:"2016:2872"); script_name(english:"Oracle Linux 6 / 7 : sudo (ELSA-2016-2872)"); script_summary(english:"Checks rpm output for the updated packages"); script_set_attribute( attribute:"synopsis", value:"The remote Oracle Linux host is missing one or more security updates." ); script_set_attribute( attribute:"description", value: "From Red Hat Security Advisory 2016:2872 : An update for sudo is now available for Red Hat Enterprise Linux 6 and Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. The sudo packages contain the sudo utility which allows system administrators to provide certain users with the permission to execute privileged commands, which are used for system management purposes, without having to log in as root. Security Fix(es) : * It was discovered that the sudo noexec restriction could have been bypassed if application run via sudo executed system(), popen(), or wordexp() C library functions with a user-supplied argument. A local user permitted to run such application via sudo with noexec restriction could use these flaws to execute arbitrary commands with elevated privileges. (CVE-2016-7032, CVE-2016-7076) These issues were discovered by Florian Weimer (Red Hat)." ); script_set_attribute( attribute:"see_also", value:"https://oss.oracle.com/pipermail/el-errata/2016-December/006553.html" ); script_set_attribute( attribute:"see_also", value:"https://oss.oracle.com/pipermail/el-errata/2016-December/006554.html" ); script_set_attribute(attribute:"solution", value:"Update the affected sudo packages."); script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C"); script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C"); script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/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:"exploit_available", value:"false"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:sudo"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:sudo-devel"); script_set_attribute(attribute:"cpe", value:"cpe:/o:oracle:linux:6"); script_set_attribute(attribute:"cpe", value:"cpe:/o:oracle:linux:7"); script_set_attribute(attribute:"vuln_publication_date", value:"2017/04/14"); script_set_attribute(attribute:"patch_publication_date", value:"2016/12/06"); script_set_attribute(attribute:"plugin_publication_date", value:"2016/12/07"); script_set_attribute(attribute:"generated_plugin", value:"current"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof."); script_family(english:"Oracle Linux Local Security Checks"); script_dependencies("ssh_get_info.nasl"); script_require_keys("Host/local_checks_enabled", "Host/OracleLinux", "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); if (!get_kb_item("Host/OracleLinux")) audit(AUDIT_OS_NOT, "Oracle Linux"); release = get_kb_item("Host/RedHat/release"); if (isnull(release) || !pregmatch(pattern: "Oracle (?:Linux Server|Enterprise Linux)", string:release)) audit(AUDIT_OS_NOT, "Oracle Linux"); os_ver = pregmatch(pattern: "Oracle (?:Linux Server|Enterprise Linux) .*release ([0-9]+(\.[0-9]+)?)", string:release); if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Oracle Linux"); os_ver = os_ver[1]; if (! preg(pattern:"^(6|7)([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Oracle Linux 6 / 7", "Oracle Linux " + 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, "Oracle Linux", cpu); flag = 0; if (rpm_check(release:"EL6", reference:"sudo-1.8.6p3-25.el6_8")) flag++; if (rpm_check(release:"EL6", reference:"sudo-devel-1.8.6p3-25.el6_8")) flag++; if (rpm_check(release:"EL7", cpu:"x86_64", reference:"sudo-1.8.6p7-21.el7_3")) flag++; if (rpm_check(release:"EL7", cpu:"x86_64", reference:"sudo-devel-1.8.6p7-21.el7_3")) 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, "sudo / sudo-devel"); }NASL family Debian Local Security Checks NASL id DEBIAN_DLA-707.NASL description It was discovered that the sudo noexec restriction could have been bypassed if application run via sudo executed system(), popen() or wordexp() C library functions with a user-supplied argument. A local user permitted to run such application via sudo with noexec restriction could possibly use this flaw to execute arbitrary commands with elevated privileges. CVE-2016-7032 noexec bypass via system() and popen() CVE-2016-7076 noexec bypass via wordexp() For Debian 7 last seen 2020-03-17 modified 2016-11-15 plugin id 94764 published 2016-11-15 reporter This script is Copyright (C) 2016-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/94764 title Debian DLA-707-1 : sudo security update code #%NASL_MIN_LEVEL 80502 # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from Debian Security Advisory DLA-707-1. The text # itself is copyright (C) Software in the Public Interest, Inc. # include("compat.inc"); if (description) { script_id(94764); script_version("2.12"); script_set_attribute(attribute:"plugin_modification_date", value:"2020/03/12"); script_cve_id("CVE-2016-7032", "CVE-2016-7076"); script_name(english:"Debian DLA-707-1 : sudo 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: "It was discovered that the sudo noexec restriction could have been bypassed if application run via sudo executed system(), popen() or wordexp() C library functions with a user-supplied argument. A local user permitted to run such application via sudo with noexec restriction could possibly use this flaw to execute arbitrary commands with elevated privileges. CVE-2016-7032 noexec bypass via system() and popen() CVE-2016-7076 noexec bypass via wordexp() For Debian 7 'Wheezy', these problems have been fixed in version 1.8.5p2-1+nmu3+deb7u2. We recommend that you upgrade your sudo 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/2016/11/msg00014.html" ); script_set_attribute( attribute:"see_also", value:"https://packages.debian.org/source/wheezy/sudo" ); script_set_attribute( attribute:"solution", value:"Upgrade the affected sudo, and sudo-ldap packages." ); script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C"); script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C"); script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/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:"exploit_available", value:"false"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:sudo"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:sudo-ldap"); script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:7.0"); script_set_attribute(attribute:"patch_publication_date", value:"2016/11/14"); script_set_attribute(attribute:"plugin_publication_date", value:"2016/11/15"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2016-2020 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:"7.0", prefix:"sudo", reference:"1.8.5p2-1+nmu3+deb7u2")) flag++; if (deb_check(release:"7.0", prefix:"sudo-ldap", reference:"1.8.5p2-1+nmu3+deb7u2")) 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_2016-3A0DF9E256.NASL description - update to 1.8.18p1 - fixes CVE-2016-7076 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 2020-06-05 modified 2016-11-21 plugin id 94998 published 2016-11-21 reporter This script is Copyright (C) 2016-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/94998 title Fedora 25 : sudo (2016-3a0df9e256) 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-2016-3a0df9e256. # include("compat.inc"); if (description) { script_id(94998); script_version("3.5"); script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/04"); script_cve_id("CVE-2016-7076"); script_xref(name:"FEDORA", value:"2016-3a0df9e256"); script_name(english:"Fedora 25 : sudo (2016-3a0df9e256)"); 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: " - update to 1.8.18p1 - fixes CVE-2016-7076 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-2016-3a0df9e256" ); script_set_attribute(attribute:"solution", value:"Update the affected sudo package."); script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C"); script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fedoraproject:fedora:sudo"); script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:25"); script_set_attribute(attribute:"vuln_publication_date", value:"2018/05/29"); script_set_attribute(attribute:"patch_publication_date", value:"2016/11/19"); script_set_attribute(attribute:"plugin_publication_date", value:"2016/11/21"); script_set_attribute(attribute:"generated_plugin", value:"current"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2016-2020 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:"^25([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Fedora 25", "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:"FC25", reference:"sudo-1.8.18p1-1.fc25")) 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, "sudo"); }NASL family Fedora Local Security Checks NASL id FEDORA_2016-48614C8B69.NASL description - update to 1.8.18p1 - fixes CVE-2016-7076 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 2020-06-05 modified 2016-11-29 plugin id 95375 published 2016-11-29 reporter This script is Copyright (C) 2016-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/95375 title Fedora 23 : sudo (2016-48614c8b69) NASL family Scientific Linux Local Security Checks NASL id SL_20161206_SUDO_ON_SL6_X.NASL description Security Fix(es) : - It was discovered that the sudo noexec restriction could have been bypassed if application run via sudo executed system(), popen(), or wordexp() C library functions with a user-supplied argument. A local user permitted to run such application via sudo with noexec restriction could use these flaws to execute arbitrary commands with elevated privileges. (CVE-2016-7032, CVE-2016-7076) These issues were discovered by Florian Weimer (Red Hat). last seen 2020-03-18 modified 2016-12-15 plugin id 95871 published 2016-12-15 reporter This script is Copyright (C) 2016-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/95871 title Scientific Linux Security Update : sudo on SL6.x, SL7.x i386/x86_64 (20161206) NASL family SuSE Local Security Checks NASL id OPENSUSE-2016-1402.NASL description This update for sudo fixes the following security issues : - Fix two security vulnerabilities that allowed users to bypass sudo last seen 2020-06-05 modified 2016-12-06 plugin id 95556 published 2016-12-06 reporter This script is Copyright (C) 2016-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/95556 title openSUSE Security Update : sudo (openSUSE-2016-1402) NASL family SuSE Local Security Checks NASL id SUSE_SU-2016-2891-1.NASL description This update for sudo fixes the following issues : - Fix two security vulnerabilities that allowed users to bypass sudo last seen 2020-06-01 modified 2020-06-02 plugin id 95312 published 2016-11-25 reporter This script is Copyright (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/95312 title SUSE SLES11 Security Update : sudo (SUSE-SU-2016:2891-1) NASL family OracleVM Local Security Checks NASL id ORACLEVM_OVMSA-2016-0170.NASL description The remote OracleVM system is missing necessary patches to address critical security updates : - Update noexec syscall blacklist - Fixes (CVE-2016-7032, CVE-2016-7076) Resolves: rhbz#1391937 - RHEL-6.8 erratum - fixed a bug causing that non-root users can list privileges of other users Resolves: rhbz#1312481 - RHEL-6.8 erratum - fixed handling of closefrom_override defaults option Resolves: rhbz#1309976 - RHEL-6.8 erratum - fixed potential getcwd failure, resulting in Null pointer exception Resolves: rhbz#1284886 - RHEL-6.8 erratum - fixed sssd last seen 2020-06-01 modified 2020-06-02 plugin id 95599 published 2016-12-07 reporter This script is Copyright (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/95599 title OracleVM 3.3 / 3.4 : sudo (OVMSA-2016-0170) NASL family Amazon Linux Local Security Checks NASL id ALA_ALAS-2017-780.NASL description It was discovered that the sudo noexec restriction could have been bypassed if application run via sudo executed system() or popen() C library functions with a user supplied argument. A local user permitted to run such application via sudo with noexec restriction could use this flaw to execute arbitrary commands with elevated privileges. (CVE-2016-7032) It was discovered that the sudo noexec restriction could have been bypassed if application run via sudo executed wordexp() C library function with a user supplied argument. A local user permitted to run such application via sudo with noexec restriction could possibly use this flaw to execute arbitrary commands with elevated privileges. (CVE-2016-7076) last seen 2020-06-01 modified 2020-06-02 plugin id 96282 published 2017-01-05 reporter This script is Copyright (C) 2017-2018 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/96282 title Amazon Linux AMI : sudo (ALAS-2017-780) NASL family SuSE Local Security Checks NASL id OPENSUSE-2016-1381.NASL description This update for sudo fixes the following issues : - fix two security vulnerabilities that allowed users to bypass sudo last seen 2020-06-05 modified 2016-12-05 plugin id 95533 published 2016-12-05 reporter This script is Copyright (C) 2016-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/95533 title openSUSE Security Update : sudo (openSUSE-2016-1381) NASL family CentOS Local Security Checks NASL id CENTOS_RHSA-2016-2872.NASL description An update for sudo is now available for Red Hat Enterprise Linux 6 and Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. The sudo packages contain the sudo utility which allows system administrators to provide certain users with the permission to execute privileged commands, which are used for system management purposes, without having to log in as root. Security Fix(es) : * It was discovered that the sudo noexec restriction could have been bypassed if application run via sudo executed system(), popen(), or wordexp() C library functions with a user-supplied argument. A local user permitted to run such application via sudo with noexec restriction could use these flaws to execute arbitrary commands with elevated privileges. (CVE-2016-7032, CVE-2016-7076) These issues were discovered by Florian Weimer (Red Hat). last seen 2020-06-01 modified 2020-06-02 plugin id 95577 published 2016-12-07 reporter This script is Copyright (C) 2016-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/95577 title CentOS 6 / 7 : sudo (CESA-2016:2872) NASL family Fedora Local Security Checks NASL id FEDORA_2016-112B333BDF.NASL description - update to 1.8.18p1 - fixes CVE-2016-7076 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 2020-06-05 modified 2016-11-14 plugin id 94746 published 2016-11-14 reporter This script is Copyright (C) 2016-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/94746 title Fedora 24 : sudo (2016-112b333bdf) NASL family OracleVM Local Security Checks NASL id ORACLEVM_OVMSA-2017-0110.NASL description The remote OracleVM system is missing necessary patches to address critical security updates : - Fixes (CVE-2017-1000367) Resolves: rhbz#1455399 - Update noexec syscall blacklist - Fixes (CVE-2016-7032, CVE-2016-7076) Resolves: rhbz#1391938 - RHEL-6.9 erratum - Fix race condition when creating /var/log/sudo-io direcotry Resolves: rhbz#1365156 last seen 2020-06-01 modified 2020-06-02 plugin id 100530 published 2017-05-31 reporter This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/100530 title OracleVM 3.3 / 3.4 : sudo (OVMSA-2017-0110) NASL family SuSE Local Security Checks NASL id SUSE_SU-2016-2904-1.NASL description This update for sudo fixes the following security issues : - Fix two security vulnerabilities that allowed users to bypass sudo last seen 2020-06-01 modified 2020-06-02 plugin id 95317 published 2016-11-25 reporter This script is Copyright (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/95317 title SUSE SLED12 / SLES12 Security Update : sudo (SUSE-SU-2016:2904-1) NASL family FreeBSD Local Security Checks NASL id FREEBSD_PKG_2E4FBC9A9D2311E6A29814DAE9D210B8.NASL description Todd C. Miller reports : A flaw exists in sudo last seen 2020-06-01 modified 2020-06-02 plugin id 94417 published 2016-10-31 reporter This script is Copyright (C) 2016-2018 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/94417 title FreeBSD : sudo -- Potential bypass of sudo_noexec.so via wordexp() (2e4fbc9a-9d23-11e6-a298-14dae9d210b8) NASL family Ubuntu Local Security Checks NASL id UBUNTU_USN-3968-1.NASL description Florian Weimer discovered that Sudo incorrectly handled the noexec restriction when used with certain applications. A local attacker could possibly use this issue to bypass configured restrictions and execute arbitrary commands. (CVE-2016-7076) It was discovered that Sudo did not properly parse the contents of /proc/[pid]/stat when attempting to determine its controlling tty. A local attacker in some configurations could possibly use this to overwrite any file on the filesystem, bypassing intended permissions. (CVE-2017-1000368). 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 2020-06-01 modified 2020-06-02 plugin id 124679 published 2019-05-07 reporter Ubuntu Security Notice (C) 2019-2020 Canonical, Inc. / NASL script (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/124679 title Ubuntu 16.04 LTS : sudo vulnerabilities (USN-3968-1) NASL family Red Hat Local Security Checks NASL id REDHAT-RHSA-2016-2872.NASL description An update for sudo is now available for Red Hat Enterprise Linux 6 and Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. The sudo packages contain the sudo utility which allows system administrators to provide certain users with the permission to execute privileged commands, which are used for system management purposes, without having to log in as root. Security Fix(es) : * It was discovered that the sudo noexec restriction could have been bypassed if application run via sudo executed system(), popen(), or wordexp() C library functions with a user-supplied argument. A local user permitted to run such application via sudo with noexec restriction could use these flaws to execute arbitrary commands with elevated privileges. (CVE-2016-7032, CVE-2016-7076) These issues were discovered by Florian Weimer (Red Hat). last seen 2020-06-01 modified 2020-06-02 plugin id 95600 published 2016-12-07 reporter This script is Copyright (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/95600 title RHEL 6 / 7 : sudo (RHSA-2016:2872) NASL family SuSE Local Security Checks NASL id OPENSUSE-2016-1343.NASL description This update for sudo fixes the following issues : - fix two security vulnerabilities that allowed users to bypass sudo last seen 2020-06-05 modified 2016-11-23 plugin id 95275 published 2016-11-23 reporter This script is Copyright (C) 2016-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/95275 title openSUSE Security Update : sudo (openSUSE-2016-1343) NASL family Huawei Local Security Checks NASL id EULEROS_SA-2018-1380.NASL description According to the version of the sudo package installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerability : - It was discovered that the sudo noexec restriction could have been bypassed if application run via sudo executed system(), popen(), or wordexp() C library functions with a user-supplied argument. A local user permitted to run such application via sudo with noexec restriction could use these flaws to execute arbitrary commands with elevated privileges. (CVE-2016-7076) 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. last seen 2020-06-01 modified 2020-06-02 plugin id 119071 published 2018-11-21 reporter This script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/119071 title EulerOS Virtualization 2.5.1 : sudo (EulerOS-SA-2018-1380) NASL family SuSE Local Security Checks NASL id SUSE_SU-2016-2893-1.NASL description This update for sudo fixes the following issues : - fix two security vulnerabilities that allowed users to bypass sudo last seen 2020-06-01 modified 2020-06-02 plugin id 95313 published 2016-11-25 reporter This script is Copyright (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/95313 title SUSE SLED12 / SLES12 Security Update : sudo (SUSE-SU-2016:2893-1)
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References
- https://www.sudo.ws/alerts/noexec_wordexp.html
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-7076
- http://www.securityfocus.com/bid/95778
- http://rhn.redhat.com/errata/RHSA-2016-2872.html
- https://security.netapp.com/advisory/ntap-20181127-0002/
- https://usn.ubuntu.com/3968-1/
- https://usn.ubuntu.com/3968-3/