Vulnerabilities > CVE-2015-3246 - Permissions, Privileges, and Access Controls vulnerability in Redhat Libuser
Attack vector
LOCAL Attack complexity
LOW Privileges required
NONE Confidentiality impact
COMPLETE Integrity impact
COMPLETE Availability impact
COMPLETE Summary
libuser before 0.56.13-8 and 0.60 before 0.60-7, as used in the userhelper program in the usermode package, directly modifies /etc/passwd, which allows local users to cause a denial of service (inconsistent file state) by causing an error during the modification. NOTE: this issue can be combined with CVE-2015-3245 to gain privileges.
Vulnerable Configurations
| Part | Description | Count |
|---|---|---|
| Application | 7 |
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Accessing, Modifying or Executing Executable Files An attack of this type exploits a system's configuration that allows an attacker to either directly access an executable file, for example through shell access; or in a possible worst case allows an attacker to upload a file and then execute it. Web servers, ftp servers, and message oriented middleware systems which have many integration points are particularly vulnerable, because both the programmers and the administrators must be in synch regarding the interfaces and the correct privileges for each interface.
- Leverage Executable Code in Non-Executable Files An attack of this type exploits a system's trust in configuration and resource files, when the executable loads the resource (such as an image file or configuration file) the attacker has modified the file to either execute malicious code directly or manipulate the target process (e.g. application server) to execute based on the malicious configuration parameters. Since systems are increasingly interrelated mashing up resources from local and remote sources the possibility of this attack occurring is high. The attack can be directed at a client system, such as causing buffer overrun through loading seemingly benign image files, as in Microsoft Security Bulletin MS04-028 where specially crafted JPEG files could cause a buffer overrun once loaded into the browser. Another example targets clients reading pdf files. In this case the attacker simply appends javascript to the end of a legitimate url for a pdf (http://www.gnucitizen.org/blog/danger-danger-danger/) http://path/to/pdf/file.pdf#whatever_name_you_want=javascript:your_code_here The client assumes that they are reading a pdf, but the attacker has modified the resource and loaded executable javascript into the client's browser process. The attack can also target server processes. The attacker edits the resource or configuration file, for example a web.xml file used to configure security permissions for a J2EE app server, adding role name "public" grants all users with the public role the ability to use the administration functionality. The server trusts its configuration file to be correct, but when they are manipulated, the attacker gains full control.
- Blue Boxing This type of attack against older telephone switches and trunks has been around for decades. A tone is sent by an adversary to impersonate a supervisor signal which has the effect of rerouting or usurping command of the line. While the US infrastructure proper may not contain widespread vulnerabilities to this type of attack, many companies are connected globally through call centers and business process outsourcing. These international systems may be operated in countries which have not upgraded Telco infrastructure and so are vulnerable to Blue boxing. Blue boxing is a result of failure on the part of the system to enforce strong authorization for administrative functions. While the infrastructure is different than standard current applications like web applications, there are historical lessons to be learned to upgrade the access control for administrative functions.
- Restful Privilege Elevation Rest uses standard HTTP (Get, Put, Delete) style permissions methods, but these are not necessarily correlated generally with back end programs. Strict interpretation of HTTP get methods means that these HTTP Get services should not be used to delete information on the server, but there is no access control mechanism to back up this logic. This means that unless the services are properly ACL'd and the application's service implementation are following these guidelines then an HTTP request can easily execute a delete or update on the server side. The attacker identifies a HTTP Get URL such as http://victimsite/updateOrder, which calls out to a program to update orders on a database or other resource. The URL is not idempotent so the request can be submitted multiple times by the attacker, additionally, the attacker may be able to exploit the URL published as a Get method that actually performs updates (instead of merely retrieving data). This may result in malicious or inadvertent altering of data on the server.
- Target Programs with Elevated Privileges This attack targets programs running with elevated privileges. The attacker would try to leverage a bug in the running program and get arbitrary code to execute with elevated privileges. For instance an attacker would look for programs that write to the system directories or registry keys (such as HKLM, which stores a number of critical Windows environment variables). These programs are typically running with elevated privileges and have usually not been designed with security in mind. Such programs are excellent exploit targets because they yield lots of power when they break. The malicious user try to execute its code at the same level as a privileged system call.
Exploit-Db
description Libuser - 'roothelper' Privilege Escalation (Metasploit). CVE-2015-3245,CVE-2015-3246. Local exploit for Linux platform. Tags: Metasploit Framework (MSF), Local file exploits/linux/local/44633.rb id EDB-ID:44633 last seen 2018-05-24 modified 2018-05-16 platform linux port published 2018-05-16 reporter Exploit-DB source https://www.exploit-db.com/download/44633/ title Libuser - 'roothelper' Privilege Escalation (Metasploit) type local description Libuser Library - Multiple Vulnerabilities. CVE-2015-3245,CVE-2015-3246. Dos exploit for linux platform id EDB-ID:37706 last seen 2016-02-04 modified 2015-07-27 published 2015-07-27 reporter Qualys Corporation source https://www.exploit-db.com/download/37706/ title Libuser Library - Multiple Vulnerabilities
Metasploit
| description | This module attempts to gain root privileges on Red Hat based Linux systems, including RHEL, Fedora and CentOS, by exploiting a newline injection vulnerability in libuser and userhelper versions prior to 0.56.13-8 and version 0.60 before 0.60-7. This module makes use of the roothelper.c exploit from Qualys to insert a new user with UID=0 in /etc/passwd. Note, the password for the current user is required by userhelper. Note, on some systems, such as Fedora 11, the user entry for the current user in /etc/passwd will become corrupted and exploitation will fail. This module has been tested successfully on libuser packaged versions 0.56.13-4.el6 on CentOS 6.0 (x86_64); 0.56.13-5.el6 on CentOS 6.5 (x86_64); 0.60-5.el7 on CentOS 7.1-1503 (x86_64); 0.56.16-1.fc13 on Fedora 13 (i686); 0.59-1.fc19 on Fedora Desktop 19 (x86_64); 0.60-3.fc20 on Fedora Desktop 20 (x86_64); 0.60-6.fc21 on Fedora Desktop 21 (x86_64); 0.60-6.fc22 on Fedora Desktop 22 (x86_64); 0.56.13-5.el6 on Red Hat 6.6 (x86_64); and 0.60-5.el7 on Red Hat 7.0 (x86_64). RHEL 5 is vulnerable, however the installed version of glibc (2.5) is missing various functions required by roothelper.c. |
| id | MSF:EXPLOIT/LINUX/LOCAL/LIBUSER_ROOTHELPER_PRIV_ESC |
| last seen | 2020-05-29 |
| modified | 2020-01-16 |
| published | 2018-04-23 |
| references | |
| reporter | Rapid7 |
| source | https://github.com/rapid7/metasploit-framework/blob/master//modules/exploits/linux/local/libuser_roothelper_priv_esc.rb |
| title | Libuser roothelper Privilege Escalation |
Nessus
NASL family SuSE Local Security Checks NASL id OPENSUSE-2015-529.NASL description libuser was updated to fix on security issue. The following vulnerability was fixed : - CVE-2015-3246: local root exploit through passwd file handling (boo#937533) last seen 2020-06-05 modified 2015-08-04 plugin id 85186 published 2015-08-04 reporter This script is Copyright (C) 2015-2020 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/85186 title openSUSE Security Update : libuser (openSUSE-2015-529) code #%NASL_MIN_LEVEL 80502 # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from openSUSE Security Update openSUSE-2015-529. # # The text description of this plugin is (C) SUSE LLC. # include("compat.inc"); if (description) { script_id(85186); script_version("2.11"); script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/04"); script_cve_id("CVE-2015-3246"); script_xref(name:"IAVA", value:"2015-A-0179"); script_name(english:"openSUSE Security Update : libuser (openSUSE-2015-529)"); script_summary(english:"Check for the openSUSE-2015-529 patch"); script_set_attribute( attribute:"synopsis", value:"The remote openSUSE host is missing a security update." ); script_set_attribute( attribute:"description", value: "libuser was updated to fix on security issue. The following vulnerability was fixed : - CVE-2015-3246: local root exploit through passwd file handling (boo#937533)" ); script_set_attribute( attribute:"see_also", value:"https://bugzilla.opensuse.org/show_bug.cgi?id=937533" ); script_set_attribute( attribute:"solution", value:"Update the affected libuser packages." ); script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C"); script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available"); script_set_attribute(attribute:"exploit_available", value:"true"); script_set_attribute(attribute:"exploit_framework_core", value:"true"); script_set_attribute(attribute:"exploited_by_malware", value:"true"); script_set_attribute(attribute:"metasploit_name", value:'Libuser roothelper Privilege Escalation'); script_set_attribute(attribute:"exploit_framework_metasploit", value:"true"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libuser"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libuser-debuginfo"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libuser-debugsource"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libuser-devel"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libuser-lang"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libuser-python"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libuser-python-debuginfo"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libuser1"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libuser1-debuginfo"); script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:opensuse:13.2"); script_set_attribute(attribute:"patch_publication_date", value:"2015/07/24"); script_set_attribute(attribute:"plugin_publication_date", value:"2015/08/04"); script_set_attribute(attribute:"stig_severity", value:"I"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2015-2020 Tenable Network Security, Inc."); 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 !~ "^(SUSE13\.2)$") audit(AUDIT_OS_RELEASE_NOT, "openSUSE", "13.2", release); if (!get_kb_item("Host/SuSE/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING); ourarch = get_kb_item("Host/cpu"); if (!ourarch) audit(AUDIT_UNKNOWN_ARCH); if (ourarch !~ "^(i586|i686|x86_64)$") audit(AUDIT_ARCH_NOT, "i586 / i686 / x86_64", ourarch); flag = 0; if ( rpm_check(release:"SUSE13.2", reference:"libuser-0.60-3.3.1") ) flag++; if ( rpm_check(release:"SUSE13.2", reference:"libuser-debuginfo-0.60-3.3.1") ) flag++; if ( rpm_check(release:"SUSE13.2", reference:"libuser-debugsource-0.60-3.3.1") ) flag++; if ( rpm_check(release:"SUSE13.2", reference:"libuser-devel-0.60-3.3.1") ) flag++; if ( rpm_check(release:"SUSE13.2", reference:"libuser-lang-0.60-3.3.1") ) flag++; if ( rpm_check(release:"SUSE13.2", reference:"libuser-python-0.60-3.3.1") ) flag++; if ( rpm_check(release:"SUSE13.2", reference:"libuser-python-debuginfo-0.60-3.3.1") ) flag++; if ( rpm_check(release:"SUSE13.2", reference:"libuser1-0.60-3.3.1") ) flag++; if ( rpm_check(release:"SUSE13.2", reference:"libuser1-debuginfo-0.60-3.3.1") ) 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, "libuser / libuser-debuginfo / libuser-debugsource / libuser-devel / etc"); }NASL family Oracle Linux Local Security Checks NASL id ORACLELINUX_ELSA-2015-1483.NASL description From Red Hat Security Advisory 2015:1483 : Updated libuser packages that fix two security issues are now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having Important security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section. The libuser library implements a standardized interface for manipulating and administering user and group accounts. Sample applications that are modeled after applications from the shadow password suite (shadow-utils) are included in these packages. Two flaws were found in the way the libuser library handled the /etc/passwd file. A local attacker could use an application compiled against libuser (for example, userhelper) to manipulate the /etc/passwd file, which could result in a denial of service or possibly allow the attacker to escalate their privileges to root. (CVE-2015-3245, CVE-2015-3246) Red Hat would like to thank Qualys for reporting these issues. All libuser users are advised to upgrade to these updated packages, which contain a backported patch to correct this issue. last seen 2020-06-01 modified 2020-06-02 plugin id 84975 published 2015-07-24 reporter This script is Copyright (C) 2015-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/84975 title Oracle Linux 7 : libuser (ELSA-2015-1483) code # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from Red Hat Security Advisory RHSA-2015:1483 and # Oracle Linux Security Advisory ELSA-2015-1483 respectively. # include("compat.inc"); if (description) { script_id(84975); script_version("2.18"); script_cvs_date("Date: 2019/09/27 13:00:36"); script_cve_id("CVE-2015-3245", "CVE-2015-3246"); script_xref(name:"RHSA", value:"2015:1483"); script_xref(name:"IAVA", value:"2015-A-0179"); script_name(english:"Oracle Linux 7 : libuser (ELSA-2015-1483)"); 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 2015:1483 : Updated libuser packages that fix two security issues are now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having Important security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section. The libuser library implements a standardized interface for manipulating and administering user and group accounts. Sample applications that are modeled after applications from the shadow password suite (shadow-utils) are included in these packages. Two flaws were found in the way the libuser library handled the /etc/passwd file. A local attacker could use an application compiled against libuser (for example, userhelper) to manipulate the /etc/passwd file, which could result in a denial of service or possibly allow the attacker to escalate their privileges to root. (CVE-2015-3245, CVE-2015-3246) Red Hat would like to thank Qualys for reporting these issues. All libuser users are advised to upgrade to these updated packages, which contain a backported patch to correct this issue." ); script_set_attribute( attribute:"see_also", value:"https://oss.oracle.com/pipermail/el-errata/2015-July/005220.html" ); script_set_attribute( attribute:"solution", value:"Update the affected libuser 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:H/RL:OF/RC:C"); script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available"); script_set_attribute(attribute:"exploit_available", value:"true"); script_set_attribute(attribute:"exploit_framework_core", value:"true"); script_set_attribute(attribute:"exploited_by_malware", value:"true"); script_set_attribute(attribute:"metasploit_name", value:'Libuser roothelper Privilege Escalation'); script_set_attribute(attribute:"exploit_framework_metasploit", value:"true"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:libuser"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:libuser-devel"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:libuser-python"); script_set_attribute(attribute:"cpe", value:"cpe:/o:oracle:linux:7"); script_set_attribute(attribute:"vuln_publication_date", value:"2015/08/11"); script_set_attribute(attribute:"patch_publication_date", value:"2015/07/23"); script_set_attribute(attribute:"plugin_publication_date", value:"2015/07/24"); 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) 2015-2019 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:"^7([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Oracle Linux 7", "Oracle Linux " + os_ver); if (!get_kb_item("Host/RedHat/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING); cpu = get_kb_item("Host/cpu"); if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH); if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Oracle Linux", cpu); if ("x86_64" >!< cpu) audit(AUDIT_ARCH_NOT, "x86_64", cpu); flag = 0; if (rpm_check(release:"EL7", cpu:"x86_64", reference:"libuser-0.60-7.el7_1")) flag++; if (rpm_check(release:"EL7", cpu:"x86_64", reference:"libuser-devel-0.60-7.el7_1")) flag++; if (rpm_check(release:"EL7", cpu:"x86_64", reference:"libuser-python-0.60-7.el7_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, "libuser / libuser-devel / libuser-python"); }NASL family Red Hat Local Security Checks NASL id REDHAT-RHSA-2015-1482.NASL description Updated libuser packages that fix two security issues are now available for Red Hat Enterprise Linux 6. Red Hat Product Security has rated this update as having Important security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section. The libuser library implements a standardized interface for manipulating and administering user and group accounts. Sample applications that are modeled after applications from the shadow password suite (shadow-utils) are included in these packages. Two flaws were found in the way the libuser library handled the /etc/passwd file. A local attacker could use an application compiled against libuser (for example, userhelper) to manipulate the /etc/passwd file, which could result in a denial of service or possibly allow the attacker to escalate their privileges to root. (CVE-2015-3245, CVE-2015-3246) Red Hat would like to thank Qualys for reporting these issues. All libuser users are advised to upgrade to these updated packages, which contain a backported patch to correct this issue. last seen 2020-06-01 modified 2020-06-02 plugin id 84976 published 2015-07-24 reporter This script is Copyright (C) 2015-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/84976 title RHEL 6 : libuser (RHSA-2015:1482) NASL family Amazon Linux Local Security Checks NASL id ALA_ALAS-2015-572.NASL description It was found that libuser, as used in the chfn userhelper functionality, does not properly filter out newline characters, which allows an authenticated local attacker to corrupt the /etc/passwd file and cause denial-of-service against the system. (CVE-2015-3245) A flaw was found in the way the libuser library handled the /etc/passwd file. A local attacker could use an application compiled against libuser (for example, userhelper) to manipulate the /etc/passwd file, which could result in a denial of service or possibly allow the attacker to escalate their privileges to root. (CVE-2015-3246) last seen 2020-06-01 modified 2020-06-02 plugin id 84964 published 2015-07-24 reporter This script is Copyright (C) 2015-2018 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/84964 title Amazon Linux AMI : usermode / libuser (ALAS-2015-572) NASL family CentOS Local Security Checks NASL id CENTOS_RHSA-2015-1483.NASL description Updated libuser packages that fix two security issues are now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having Important security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section. The libuser library implements a standardized interface for manipulating and administering user and group accounts. Sample applications that are modeled after applications from the shadow password suite (shadow-utils) are included in these packages. Two flaws were found in the way the libuser library handled the /etc/passwd file. A local attacker could use an application compiled against libuser (for example, userhelper) to manipulate the /etc/passwd file, which could result in a denial of service or possibly allow the attacker to escalate their privileges to root. (CVE-2015-3245, CVE-2015-3246) Red Hat would like to thank Qualys for reporting these issues. All libuser users are advised to upgrade to these updated packages, which contain a backported patch to correct this issue. last seen 2020-06-01 modified 2020-06-02 plugin id 84988 published 2015-07-27 reporter This script is Copyright (C) 2015-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/84988 title CentOS 7 : libuser (CESA-2015:1483) NASL family F5 Networks Local Security Checks NASL id F5_BIGIP_SOL05770600.NASL description libuser before 0.56.13-8 and 0.60 before 0.60-7, as used in the userhelper program in the usermode package, directly modifies /etc/passwd, which allows local users to cause a denial of service (inconsistent file state) by causing an error during the modification. NOTE: this issue can be combined with CVE-2015-3245 to gain privileges. last seen 2020-06-01 modified 2020-06-02 plugin id 91327 published 2016-05-26 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/91327 title F5 Networks BIG-IP : Linux libuser vulnerability (SOL05770600) NASL family Scientific Linux Local Security Checks NASL id SL_20150723_LIBUSER_ON_SL6_X.NASL description Two flaws were found in the way the libuser library handled the /etc/passwd file. A local attacker could use an application compiled against libuser (for example, userhelper) to manipulate the /etc/passwd file, which could result in a denial of service or possibly allow the attacker to escalate their privileges to root. (CVE-2015-3245, CVE-2015-3246) last seen 2020-03-18 modified 2015-08-04 plugin id 85210 published 2015-08-04 reporter This script is Copyright (C) 2015-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/85210 title Scientific Linux Security Update : libuser on SL6.x i386/x86_64 (20150723) NASL family CentOS Local Security Checks NASL id CENTOS_RHSA-2015-1482.NASL description Updated libuser packages that fix two security issues are now available for Red Hat Enterprise Linux 6. Red Hat Product Security has rated this update as having Important security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section. The libuser library implements a standardized interface for manipulating and administering user and group accounts. Sample applications that are modeled after applications from the shadow password suite (shadow-utils) are included in these packages. Two flaws were found in the way the libuser library handled the /etc/passwd file. A local attacker could use an application compiled against libuser (for example, userhelper) to manipulate the /etc/passwd file, which could result in a denial of service or possibly allow the attacker to escalate their privileges to root. (CVE-2015-3245, CVE-2015-3246) Red Hat would like to thank Qualys for reporting these issues. All libuser users are advised to upgrade to these updated packages, which contain a backported patch to correct this issue. last seen 2020-06-01 modified 2020-06-02 plugin id 85029 published 2015-07-28 reporter This script is Copyright (C) 2015-2018 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/85029 title CentOS 6 : libuser (CESA-2015:1482) NASL family Scientific Linux Local Security Checks NASL id SL_20150723_LIBUSER_ON_SL7_X.NASL description Two flaws were found in the way the libuser library handled the /etc/passwd file. A local attacker could use an application compiled against libuser (for example, userhelper) to manipulate the /etc/passwd file, which could result in a denial of service or possibly allow the attacker to escalate their privileges to root. (CVE-2015-3245, CVE-2015-3246) last seen 2020-03-18 modified 2015-07-27 plugin id 85004 published 2015-07-27 reporter This script is Copyright (C) 2015-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/85004 title Scientific Linux Security Update : libuser on SL7.x x86_64 (20150723) NASL family Fedora Local Security Checks NASL id FEDORA_2015-12301.NASL description Security fix for CVE-2015-3245, CVE-2015-3246 Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-06-05 modified 2015-07-31 plugin id 85134 published 2015-07-31 reporter This script is Copyright (C) 2015-2020 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/85134 title Fedora 22 : libuser-0.62-1.fc22 (2015-12301) NASL family OracleVM Local Security Checks NASL id ORACLEVM_OVMSA-2015-0106.NASL description The remote OracleVM system is missing necessary patches to address critical security updates : - Update CVE-2015-3246 patch based on review comments Resolves: #1235518 - Don&rsquo t use 512-bit RSA private keys in tests Related: #1235518 - Fix testsuite failures if more than one architecture is building concurrently Related: #1235518 - Fix (CVE-2015-3246) Resolves: #1235518 last seen 2020-06-01 modified 2020-06-02 plugin id 85147 published 2015-07-31 reporter This script is Copyright (C) 2015-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/85147 title OracleVM 3.3 : libuser (OVMSA-2015-0106) NASL family Fedora Local Security Checks NASL id FEDORA_2015-12064.NASL description Security fix for CVE-2015-3245, CVE-2015-3246 Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-06-05 modified 2015-08-03 plugin id 85167 published 2015-08-03 reporter This script is Copyright (C) 2015-2020 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/85167 title Fedora 21 : libuser-0.62-1.fc21 (2015-12064) NASL family Red Hat Local Security Checks NASL id REDHAT-RHSA-2015-1483.NASL description Updated libuser packages that fix two security issues are now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having Important security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section. The libuser library implements a standardized interface for manipulating and administering user and group accounts. Sample applications that are modeled after applications from the shadow password suite (shadow-utils) are included in these packages. Two flaws were found in the way the libuser library handled the /etc/passwd file. A local attacker could use an application compiled against libuser (for example, userhelper) to manipulate the /etc/passwd file, which could result in a denial of service or possibly allow the attacker to escalate their privileges to root. (CVE-2015-3245, CVE-2015-3246) Red Hat would like to thank Qualys for reporting these issues. All libuser users are advised to upgrade to these updated packages, which contain a backported patch to correct this issue. last seen 2020-06-01 modified 2020-06-02 plugin id 84977 published 2015-07-24 reporter This script is Copyright (C) 2015-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/84977 title RHEL 7 : libuser (RHSA-2015:1483) NASL family Oracle Linux Local Security Checks NASL id ORACLELINUX_ELSA-2015-1482.NASL description From Red Hat Security Advisory 2015:1482 : Updated libuser packages that fix two security issues are now available for Red Hat Enterprise Linux 6. Red Hat Product Security has rated this update as having Important security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section. The libuser library implements a standardized interface for manipulating and administering user and group accounts. Sample applications that are modeled after applications from the shadow password suite (shadow-utils) are included in these packages. Two flaws were found in the way the libuser library handled the /etc/passwd file. A local attacker could use an application compiled against libuser (for example, userhelper) to manipulate the /etc/passwd file, which could result in a denial of service or possibly allow the attacker to escalate their privileges to root. (CVE-2015-3245, CVE-2015-3246) Red Hat would like to thank Qualys for reporting these issues. All libuser users are advised to upgrade to these updated packages, which contain a backported patch to correct this issue. last seen 2020-06-01 modified 2020-06-02 plugin id 85115 published 2015-07-30 reporter This script is Copyright (C) 2015-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/85115 title Oracle Linux 6 : libuser (ELSA-2015-1482) NASL family Debian Local Security Checks NASL id DEBIAN_DLA-468.NASL description Two security vulnerabilities were discovered in libuser, a library that implements a standardized interface for manipulating and administering user and group accounts, that could lead to a denial of service or privilege escalation by local users. CVE-2015-3245 Incomplete blacklist vulnerability in the chfn function in libuser before 0.56.13-8 and 0.60 before 0.60-7, as used in the userhelper program in the usermode package, allows local users to cause a denial of service (/etc/passwd corruption) via a newline character in the GECOS field. CVE-2015-3246 libuser before 0.56.13-8 and 0.60 before 0.60-7, as used in the userhelper program in the usermode package, directly modifies /etc/passwd, which allows local users to cause a denial of service (inconsistent file state) by causing an error during the modification. NOTE: this issue can be combined with CVE-2015-3245 to gain privileges. In addition the usermode package, which depends on libuser, was rebuilt against the updated version. For Debian 7 last seen 2020-03-17 modified 2016-05-13 plugin id 91108 published 2016-05-13 reporter This script is Copyright (C) 2016-2020 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/91108 title Debian DLA-468-1 : libuser security update
Packetstorm
data source https://packetstormsecurity.com/files/download/132820/QSA-20150723.txt id PACKETSTORM:132820 last seen 2016-12-05 published 2015-07-23 reporter Qualys Security Advisory source https://packetstormsecurity.com/files/132820/Qualys-Security-Advisory-userhelper-libuser.html title Qualys Security Advisory - userhelper / libuser data source https://packetstormsecurity.com/files/download/147599/libuser_roothelper_priv_esc.rb.txt id PACKETSTORM:147599 last seen 2018-05-14 published 2018-05-13 reporter Brendan Coles source https://packetstormsecurity.com/files/147599/Libuser-roothelper-Privilege-Escalation.html title Libuser roothelper Privilege Escalation
Redhat
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References
- http://lists.fedoraproject.org/pipermail/package-announce/2015-August/163044.html
- http://lists.fedoraproject.org/pipermail/package-announce/2015-July/162947.html
- http://lists.opensuse.org/opensuse-security-announce/2015-08/msg00000.html
- http://rhn.redhat.com/errata/RHSA-2015-1482.html
- http://rhn.redhat.com/errata/RHSA-2015-1483.html
- http://www.securityfocus.com/bid/76022
- http://www.securitytracker.com/id/1033040
- https://access.redhat.com/articles/1537873
- https://www.exploit-db.com/exploits/44633/
- https://www.qualys.com/2015/07/23/cve-2015-3245-cve-2015-3246/cve-2015-3245-cve-2015-3246.txt