Vulnerabilities > CVE-2017-15097 - Link Following vulnerability in Redhat products
Attack vector
LOCAL Attack complexity
LOW Privileges required
HIGH Confidentiality impact
HIGH Integrity impact
HIGH Availability impact
HIGH Summary
Privilege escalation flaws were found in the Red Hat initialization scripts of PostgreSQL. An attacker with access to the postgres user account could use these flaws to obtain root access on the server machine.
Vulnerable Configurations
| Part | Description | Count |
|---|---|---|
| OS | 6 |
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Symlink Attack An attacker positions a symbolic link in such a manner that the targeted user or application accesses the link's endpoint, assuming that it is accessing a file with the link's name. The endpoint file may be either output or input. If the file is output, the result is that the endpoint is modified, instead of a file at the intended location. Modifications to the endpoint file may include appending, overwriting, corrupting, changing permissions, or other modifications. In some variants of this attack the attacker may be able to control the change to a file while in other cases they cannot. The former is especially damaging since the attacker may be able to grant themselves increased privileges or insert false information, but the latter can also be damaging as it can expose sensitive information or corrupt or destroy vital system or application files. Alternatively, the endpoint file may serve as input to the targeted application. This can be used to feed malformed input into the target or to cause the target to process different information, possibly allowing the attacker to control the actions of the target or to cause the target to expose information to the attacker. Moreover, the actions taken on the endpoint file are undertaken with the permissions of the targeted user or application, which may exceed the permissions that the attacker would normally have.
- 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.
- Manipulating Input to File System Calls An attacker manipulates inputs to the target software which the target software passes to file system calls in the OS. The goal is to gain access to, and perhaps modify, areas of the file system that the target software did not intend to be accessible.
Nessus
NASL family Huawei Local Security Checks NASL id EULEROS_SA-2017-1341.NASL description According to the versions of the postgresql packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : - Privilege escalation flaws were found in the initialization scripts of PostgreSQL. An attacker with access to the postgres user account could use these flaws to obtain root access on the server machine. (CVE-2017-12172, CVE-2017-15097) 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 2017-12-18 plugin id 105322 published 2017-12-18 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/105322 title EulerOS 2.0 SP2 : postgresql (EulerOS-SA-2017-1341) code # # (C) Tenable Network Security, Inc. # include("compat.inc"); if (description) { script_id(105322); script_version("3.14"); script_set_attribute(attribute:"plugin_modification_date", value:"2020/05/04"); script_cve_id( "CVE-2017-12172", "CVE-2017-15097" ); script_name(english:"EulerOS 2.0 SP2 : postgresql (EulerOS-SA-2017-1341)"); 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 postgresql packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : - Privilege escalation flaws were found in the initialization scripts of PostgreSQL. An attacker with access to the postgres user account could use these flaws to obtain root access on the server machine. (CVE-2017-12172, CVE-2017-15097) 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-2017-1341 script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?06772c28"); script_set_attribute(attribute:"solution", value: "Update the affected postgresql 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:H/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:"2017/12/14"); script_set_attribute(attribute:"plugin_publication_date", value:"2017/12/18"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:postgresql"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:postgresql-contrib"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:postgresql-devel"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:postgresql-docs"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:postgresql-libs"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:postgresql-plperl"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:postgresql-plpython"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:postgresql-pltcl"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:postgresql-server"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:postgresql-test"); 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|$)") audit(AUDIT_OS_NOT, "EulerOS 2.0"); sp = get_kb_item("Host/EulerOS/sp"); if (isnull(sp) || sp !~ "^(2)$") audit(AUDIT_OS_NOT, "EulerOS 2.0 SP2"); uvp = get_kb_item("Host/EulerOS/uvp_version"); if (!empty_or_null(uvp)) audit(AUDIT_OS_NOT, "EulerOS 2.0 SP2", "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 = ["postgresql-9.2.23-3", "postgresql-contrib-9.2.23-3", "postgresql-devel-9.2.23-3", "postgresql-docs-9.2.23-3", "postgresql-libs-9.2.23-3", "postgresql-plperl-9.2.23-3", "postgresql-plpython-9.2.23-3", "postgresql-pltcl-9.2.23-3", "postgresql-server-9.2.23-3", "postgresql-test-9.2.23-3"]; foreach (pkg in pkgs) if (rpm_check(release:"EulerOS-2.0", sp:"2", 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, "postgresql"); }NASL family Huawei Local Security Checks NASL id EULEROS_SA-2017-1340.NASL description According to the versions of the postgresql packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : - Privilege escalation flaws were found in the initialization scripts of PostgreSQL. An attacker with access to the postgres user account could use these flaws to obtain root access on the server machine. (CVE-2017-12172, CVE-2017-15097) 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 2017-12-18 plugin id 105321 published 2017-12-18 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/105321 title EulerOS 2.0 SP1 : postgresql (EulerOS-SA-2017-1340) NASL family CentOS Local Security Checks NASL id CENTOS_RHSA-2017-3402.NASL description An update for postgresql is now available for 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. PostgreSQL is an advanced object-relational database management system (DBMS). Security Fix(es) : * Privilege escalation flaws were found in the initialization scripts of PostgreSQL. An attacker with access to the postgres user account could use these flaws to obtain root access on the server machine. (CVE-2017-12172, CVE-2017-15097) Note: This patch drops the script privileges from root to the postgres user. Therefore, this update works properly only if the postgres user has write access to the postgres last seen 2020-06-01 modified 2020-06-02 plugin id 105114 published 2017-12-11 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/105114 title CentOS 7 : postgresql (CESA-2017:3402) NASL family Scientific Linux Local Security Checks NASL id SL_20171219_POSTGRESQL_ON_SL7_X.NASL description Security Fix(es) : - Privilege escalation flaws were found in the initialization scripts of PostgreSQL. An attacker with access to the postgres user account could use these flaws to obtain root access on the server machine. (CVE-2017-12172, CVE-2017-15097) Note: This patch drops the script privileges from root to the postgres user. Therefore, this update works properly only if the postgres user has write access to the postgres last seen 2020-03-18 modified 2017-12-20 plugin id 105387 published 2017-12-20 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/105387 title Scientific Linux Security Update : postgresql on SL7.x x86_64 (20171219) NASL family Oracle Linux Local Security Checks NASL id ORACLELINUX_ELSA-2017-3402.NASL description From Red Hat Security Advisory 2017:3402 : An update for postgresql is now available for 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. PostgreSQL is an advanced object-relational database management system (DBMS). Security Fix(es) : * Privilege escalation flaws were found in the initialization scripts of PostgreSQL. An attacker with access to the postgres user account could use these flaws to obtain root access on the server machine. (CVE-2017-12172, CVE-2017-15097) Note: This patch drops the script privileges from root to the postgres user. Therefore, this update works properly only if the postgres user has write access to the postgres last seen 2020-06-01 modified 2020-06-02 plugin id 105142 published 2017-12-11 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/105142 title Oracle Linux 7 : postgresql (ELSA-2017-3402) NASL family NewStart CGSL Local Security Checks NASL id NEWSTART_CGSL_NS-SA-2019-0006_POSTGRESQL.NASL description The remote NewStart CGSL host, running version MAIN 5.04, has postgresql packages installed that are affected by multiple vulnerabilities: - Privilege escalation flaws were found in the Red Hat initialization scripts of PostgreSQL. An attacker with access to the postgres user account could use these flaws to obtain root access on the server machine. (CVE-2017-15097) - Privilege escalation flaws were found in the initialization scripts of PostgreSQL. An attacker with access to the postgres user account could use these flaws to obtain root access on the server machine. (CVE-2017-12172) Note that Nessus has not tested for this issue but has instead relied only on the application last seen 2020-06-01 modified 2020-06-02 plugin id 127150 published 2019-08-12 reporter This script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/127150 title NewStart CGSL MAIN 5.04 : postgresql Multiple Vulnerabilities (NS-SA-2019-0006) NASL family Red Hat Local Security Checks NASL id REDHAT-RHSA-2017-3402.NASL description An update for postgresql is now available for 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. PostgreSQL is an advanced object-relational database management system (DBMS). Security Fix(es) : * Privilege escalation flaws were found in the initialization scripts of PostgreSQL. An attacker with access to the postgres user account could use these flaws to obtain root access on the server machine. (CVE-2017-12172, CVE-2017-15097) Note: This patch drops the script privileges from root to the postgres user. Therefore, this update works properly only if the postgres user has write access to the postgres last seen 2020-06-01 modified 2020-06-02 plugin id 105092 published 2017-12-08 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/105092 title RHEL 7 : postgresql (RHSA-2017:3402)
Redhat
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