Vulnerabilities > CVE-2017-7546 - Improper Authentication vulnerability in multiple products
Attack vector
NETWORK Attack complexity
LOW Privileges required
NONE Confidentiality impact
PARTIAL Integrity impact
PARTIAL Availability impact
PARTIAL Summary
PostgreSQL versions before 9.2.22, 9.3.18, 9.4.13, 9.5.8 and 9.6.4 are vulnerable to incorrect authentication flaw allowing remote attackers to gain access to database accounts with an empty password.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Authentication Abuse An attacker obtains unauthorized access to an application, service or device either through knowledge of the inherent weaknesses of an authentication mechanism, or by exploiting a flaw in the authentication scheme's implementation. In such an attack an authentication mechanism is functioning but a carefully controlled sequence of events causes the mechanism to grant access to the attacker. This attack may exploit assumptions made by the target's authentication procedures, such as assumptions regarding trust relationships or assumptions regarding the generation of secret values. This attack differs from Authentication Bypass attacks in that Authentication Abuse allows the attacker to be certified as a valid user through illegitimate means, while Authentication Bypass allows the user to access protected material without ever being certified as an authenticated user. This attack does not rely on prior sessions established by successfully authenticating users, as relied upon for the "Exploitation of Session Variables, Resource IDs and other Trusted Credentials" attack patterns.
- Exploiting Trust in Client (aka Make the Client Invisible) An attack of this type exploits a programs' vulnerabilities in client/server communication channel authentication and data integrity. It leverages the implicit trust a server places in the client, or more importantly, that which the server believes is the client. An attacker executes this type of attack by placing themselves in the communication channel between client and server such that communication directly to the server is possible where the server believes it is communicating only with a valid client. There are numerous variations of this type of attack.
- Utilizing REST's Trust in the System Resource to Register Man in the Middle This attack utilizes a REST(REpresentational State Transfer)-style applications' trust in the system resources and environment to place man in the middle once SSL is terminated. Rest applications premise is that they leverage existing infrastructure to deliver web services functionality. An example of this is a Rest application that uses HTTP Get methods and receives a HTTP response with an XML document. These Rest style web services are deployed on existing infrastructure such as Apache and IIS web servers with no SOAP stack required. Unfortunately from a security standpoint, there frequently is no interoperable identity security mechanism deployed, so Rest developers often fall back to SSL to deliver security. In large data centers, SSL is typically terminated at the edge of the network - at the firewall, load balancer, or router. Once the SSL is terminated the HTTP request is in the clear (unless developers have hashed or encrypted the values, but this is rare). The attacker can utilize a sniffer such as Wireshark to snapshot the credentials, such as username and password that are passed in the clear once SSL is terminated. Once the attacker gathers these credentials, they can submit requests to the web service provider just as authorized user do. There is not typically an authentication on the client side, beyond what is passed in the request itself so once this is compromised, then this is generally sufficient to compromise the service's authentication scheme.
- Man in the Middle Attack This type of attack targets the communication between two components (typically client and server). The attacker places himself in the communication channel between the two components. Whenever one component attempts to communicate with the other (data flow, authentication challenges, etc.), the data first goes to the attacker, who has the opportunity to observe or alter it, and it is then passed on to the other component as if it was never intercepted. This interposition is transparent leaving the two compromised components unaware of the potential corruption or leakage of their communications. The potential for Man-in-the-Middle attacks yields an implicit lack of trust in communication or identify between two components.
Nessus
NASL family Scientific Linux Local Security Checks NASL id SL_20170914_POSTGRESQL_ON_SL7_X.NASL description The following packages have been upgraded to a later upstream version: postgresql (9.2.23). Security Fix(es) : - It was found that authenticating to a PostgreSQL database account with an empty password was possible despite libpq last seen 2020-03-18 modified 2017-09-15 plugin id 103244 published 2017-09-15 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/103244 title Scientific Linux Security Update : postgresql on SL7.x x86_64 (20170914) NASL family Fedora Local Security Checks NASL id FEDORA_2017-F9E66916EC.NASL description https://www.postgresql.org/docs/9.6/static/release-9-6-4.html 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 2017-08-21 plugin id 102614 published 2017-08-21 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/102614 title Fedora 26 : mingw-postgresql (2017-f9e66916ec) NASL family SuSE Local Security Checks NASL id OPENSUSE-2017-985.NASL description Postgresql93 was updated to 9.3.18 to fix the following issues : - CVE-2017-7547: Further restrict visibility of pg_user_mappings.umoptions, to protect passwords stored as user mapping options. (bsc#1051685) - CVE-2017-7546: Disallow empty passwords in all password-based authentication methods. (bsc#1051684) - CVE-2017-7548: lo_put() function ignores ACLs. (bsc#1053259) The changelog for the release is here : 	https://www.postgresql.org/docs/9.3/static/release-9-3-18.html This update was imported from the SUSE:SLE-12:Update update project. last seen 2020-06-05 modified 2017-08-31 plugin id 102847 published 2017-08-31 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/102847 title openSUSE Security Update : postgresql93 (openSUSE-2017-985) NASL family FreeBSD Local Security Checks NASL id FREEBSD_PKG_982872F17DD311E797366CC21735F730.NASL description The PostgreSQL project reports : - CVE-2017-7546: Empty password accepted in some authentication methods - CVE-2017-7547: The last seen 2020-06-01 modified 2020-06-02 plugin id 102408 published 2017-08-11 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/102408 title FreeBSD : PostgreSQL vulnerabilities (982872f1-7dd3-11e7-9736-6cc21735f730) NASL family SuSE Local Security Checks NASL id OPENSUSE-2018-204.NASL description This update for postgresql95 fixes the following issues : Upate to PostgreSQL 9.5.11 : Security issues fixed : - https://www.postgresql.org/docs/9.5/static/release-9-5-11.html - CVE-2018-1053, boo#1077983: Ensure that all temporary files made by pg_upgrade are non-world-readable. - boo#1079757: Rename pg_rewind last seen 2020-06-05 modified 2018-02-23 plugin id 106965 published 2018-02-23 reporter This script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/106965 title openSUSE Security Update : postgresql95 (openSUSE-2018-204) NASL family Debian Local Security Checks NASL id DEBIAN_DSA-3935.NASL description Several vulnerabilities have been found in the PostgreSQL database system : - CVE-2017-7546 In some authentication methods empty passwords were accepted. - CVE-2017-7547 User mappings could leak data to unprivileged users. - CVE-2017-7548 The lo_put() function ignored ACLs. For more in-depth descriptions of the security vulnerabilities, please see https://www.postgresql.org/about/news/1772/ last seen 2020-06-01 modified 2020-06-02 plugin id 102442 published 2017-08-14 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/102442 title Debian DSA-3935-1 : postgresql-9.4 - security update NASL family CentOS Local Security Checks NASL id CENTOS_RHSA-2017-2860.NASL description An update for postgresql is now available for Red Hat Enterprise Linux 6. 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) : * It was found that authenticating to a PostgreSQL database account with an empty password was possible despite libpq last seen 2020-06-01 modified 2020-06-02 plugin id 103706 published 2017-10-09 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/103706 title CentOS 6 : postgresql (CESA-2017:2860) NASL family Oracle Linux Local Security Checks NASL id ORACLELINUX_ELSA-2017-2860.NASL description From Red Hat Security Advisory 2017:2860 : An update for postgresql is now available for Red Hat Enterprise Linux 6. 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) : * It was found that authenticating to a PostgreSQL database account with an empty password was possible despite libpq last seen 2020-06-01 modified 2020-06-02 plugin id 103684 published 2017-10-06 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/103684 title Oracle Linux 6 : postgresql (ELSA-2017-2860) NASL family Debian Local Security Checks NASL id DEBIAN_DLA-1051.NASL description Several vulnerabilities have been found in the PostgreSQL database system : CVE-2017-7486 Andrew Wheelwright discovered that user mappings were insufficiently restricted. CVE-2017-7546 In some authentication methods empty passwords were accepted. CVE-2017-7547 User mappings could leak data to unprivileged users. For Debian 7 last seen 2020-03-17 modified 2017-08-11 plugin id 102368 published 2017-08-11 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/102368 title Debian DLA-1051-1 : postgresql-9.1 security update NASL family Red Hat Local Security Checks NASL id REDHAT-RHSA-2017-2860.NASL description An update for postgresql is now available for Red Hat Enterprise Linux 6. 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) : * It was found that authenticating to a PostgreSQL database account with an empty password was possible despite libpq last seen 2020-06-01 modified 2020-06-02 plugin id 103686 published 2017-10-06 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/103686 title RHEL 6 : postgresql (RHSA-2017:2860) NASL family Huawei Local Security Checks NASL id EULEROS_SA-2017-1232.NASL description According to the versions of the postgresql packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : - It was found that authenticating to a PostgreSQL database account with an empty password was possible despite libpq last seen 2020-05-06 modified 2017-10-10 plugin id 103734 published 2017-10-10 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/103734 title EulerOS 2.0 SP2 : postgresql (EulerOS-SA-2017-1232) NASL family SuSE Local Security Checks NASL id SUSE_SU-2017-2236-1.NASL description Postgresql93 was updated to 9.3.18 to fix the following issues : - CVE-2017-7547: Further restrict visibility of pg_user_mappings.umoptions, to protect passwords stored as user mapping options. (bsc#1051685) - CVE-2017-7546: Disallow empty passwords in all password-based authentication methods. (bsc#1051684) - CVE-2017-7548: lo_put() function ignores ACLs. (bsc#1053259) The changelog for the release is here: 	https://www.postgresql.org/docs/9.3/static/release-9 -3-18.html Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-06-01 modified 2020-06-02 plugin id 102695 published 2017-08-23 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/102695 title SUSE SLES12 Security Update : postgresql93 (SUSE-SU-2017:2236-1) NASL family SuSE Local Security Checks NASL id SUSE_SU-2017-2258-1.NASL description Postgresql94 was updated to 9.4.13 to fix the following issues : - CVE-2017-7547: Further restrict visibility of pg_user_mappings.umoptions, to protect passwords stored as user mapping options. (bsc#1051685) - CVE-2017-7546: Disallow empty passwords in all password-based authentication methods. (bsc#1051684) - CVE-2017-7548: lo_put() function ignores ACLs. (bsc#1053259) The changelog for this release is here: https://www.postgresql.org/docs/9.4/static/release-9-4-1 3.html Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-06-01 modified 2020-06-02 plugin id 102800 published 2017-08-28 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/102800 title SUSE SLES11 Security Update : postgresql94 (SUSE-SU-2017:2258-1) NASL family SuSE Local Security Checks NASL id SUSE_SU-2017-2356-1.NASL description This update for postgresql96 fixes the following issues : - CVE-2017-7547: Further restrict visibility of pg_user_mappings.umoptions, to protect passwords stored as user mapping options. (bsc#1051685) - CVE-2017-7546: Disallow empty passwords in all password-based authentication methods. (bsc#1051684) - CVE-2017-7548: lo_put() function ignores ACLs. (bsc#1053259) The changelog for this release is here: https://www.postgresql.org/docs/9.6/static/release-9-6-4 .html Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-06-01 modified 2020-06-02 plugin id 102974 published 2017-09-06 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/102974 title SUSE SLED12 / SLES12 Security Update : postgresql96 (SUSE-SU-2017:2356-1) NASL family NewStart CGSL Local Security Checks NASL id NEWSTART_CGSL_NS-SA-2019-0121_POSTGRESQL.NASL description The remote NewStart CGSL host, running version MAIN 4.05, has postgresql packages installed that are affected by a vulnerability: - It was found that authenticating to a PostgreSQL database account with an empty password was possible despite libpq last seen 2020-06-01 modified 2020-06-02 plugin id 127366 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/127366 title NewStart CGSL MAIN 4.05 : postgresql Vulnerability (NS-SA-2019-0121) NASL family Scientific Linux Local Security Checks NASL id SL_20171005_POSTGRESQL_ON_SL6_X.NASL description Security Fix(es) : - It was found that authenticating to a PostgreSQL database account with an empty password was possible despite libpq last seen 2020-03-18 modified 2017-10-06 plugin id 103688 published 2017-10-06 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/103688 title Scientific Linux Security Update : postgresql on SL6.x i386/x86_64 (20171005) NASL family CentOS Local Security Checks NASL id CENTOS_RHSA-2017-2728.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). The following packages have been upgraded to a later upstream version: postgresql (9.2.23). (BZ#1484639, BZ#1484647) Security Fix(es) : * It was found that authenticating to a PostgreSQL database account with an empty password was possible despite libpq last seen 2020-06-01 modified 2020-06-02 plugin id 103230 published 2017-09-15 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/103230 title CentOS 7 : postgresql (CESA-2017:2728) NASL family Huawei Local Security Checks NASL id EULEROS_SA-2017-1231.NASL description According to the versions of the postgresql packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : - It was found that authenticating to a PostgreSQL database account with an empty password was possible despite libpq last seen 2020-05-06 modified 2017-10-10 plugin id 103733 published 2017-10-10 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/103733 title EulerOS 2.0 SP1 : postgresql (EulerOS-SA-2017-1231) NASL family Amazon Linux Local Security Checks NASL id ALA_ALAS-2017-884.NASL description pg_user_mappings view discloses passwords to users lacking server privileges : An authorization flaw was found in the way PostgreSQL handled access to the pg_user_mappings view on foreign servers. A remote authenticated attacker could potentially use this flaw to retrieve passwords from the user mappings defined by the foreign server owners without actually having the privileges to do so. (CVE-2017-7547) Empty password accepted in some authentication methods : It was found that authenticating to a PostgreSQL database account with an empty password was possible despite libpq last seen 2020-06-01 modified 2020-06-02 plugin id 102872 published 2017-09-01 reporter This script is Copyright (C) 2017-2018 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/102872 title Amazon Linux AMI : postgresql93 / postgresql92 (ALAS-2017-884) NASL family Debian Local Security Checks NASL id DEBIAN_DSA-3936.NASL description Several vulnerabilities have been found in the PostgreSQL database system : - CVE-2017-7546 In some authentication methods empty passwords were accepted. - CVE-2017-7547 User mappings could leak data to unprivileged users. - CVE-2017-7548 The lo_put() function ignored ACLs. For more in-depth descriptions of the security vulnerabilities, please see https://www.postgresql.org/about/news/1772/ last seen 2020-06-01 modified 2020-06-02 plugin id 102443 published 2017-08-14 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/102443 title Debian DSA-3936-1 : postgresql-9.6 - security update NASL family Fedora Local Security Checks NASL id FEDORA_2017-D9CAC37BD8.NASL description rebase: update to 9.6.4, security fix for CVE-2017-7546 CVE-2017-7547 CVE-2017-7548 Per release notes: https://www.postgresql.org/docs/9.6/static/release-9-6-4.html 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 2017-08-15 plugin id 102490 published 2017-08-15 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/102490 title Fedora 26 : postgresql (2017-d9cac37bd8) NASL family SuSE Local Security Checks NASL id OPENSUSE-2017-1020.NASL description This update for postgresql94 fixes the following issues : - CVE-2017-7547: Further restrict visibility of pg_user_mappings.umoptions, to protect passwords stored as user mapping options. (bsc#1051685) - CVE-2017-7546: Disallow empty passwords in all password-based authentication methods. (bsc#1051684) - CVE-2017-7548: lo_put() function ignores ACLs. (bsc#1053259) This update was imported from the SUSE:SLE-12:Update update project. last seen 2020-06-05 modified 2017-09-13 plugin id 103156 published 2017-09-13 reporter This script is Copyright (C) 2017-2020 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/103156 title openSUSE Security Update : postgresql94 (openSUSE-2017-1020) NASL family Red Hat Local Security Checks NASL id REDHAT-RHSA-2017-2728.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). The following packages have been upgraded to a later upstream version: postgresql (9.2.23). (BZ#1484639, BZ#1484647) Security Fix(es) : * It was found that authenticating to a PostgreSQL database account with an empty password was possible despite libpq last seen 2020-06-01 modified 2020-06-02 plugin id 103209 published 2017-09-14 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/103209 title RHEL 7 : postgresql (RHSA-2017:2728) NASL family Fedora Local Security Checks NASL id FEDORA_2017-9148FE36B9.NASL description rebase: update to 9.5.8, security fix for CVE-2017-7546 CVE-2017-7547 CVE-2017-7548 Per release notes: http://www.postgresql.org/docs/9.5/static/release-9-5-8.html 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 2017-08-30 plugin id 102828 published 2017-08-30 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/102828 title Fedora 25 : postgresql (2017-9148fe36b9) NASL family SuSE Local Security Checks NASL id OPENSUSE-2017-1021.NASL description This update for postgresql96 fixes the following issues : - CVE-2017-7547: Further restrict visibility of pg_user_mappings.umoptions, to protect passwords stored as user mapping options. (bsc#1051685) - CVE-2017-7546: Disallow empty passwords in all password-based authentication methods. (bsc#1051684) - CVE-2017-7548: lo_put() function ignores ACLs. (bsc#1053259) The changelog for this release is here: 	https://www.postgresql.org/docs/9.6/static/release-9-6-4.html This update was imported from the SUSE:SLE-12:Update update project. last seen 2020-06-05 modified 2017-09-13 plugin id 103157 published 2017-09-13 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/103157 title openSUSE Security Update : postgresql96 (openSUSE-2017-1021) NASL family Virtuozzo Local Security Checks NASL id VIRTUOZZO_VZLSA-2017-2860.NASL description An update for postgresql is now available for Red Hat Enterprise Linux 6. 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) : * It was found that authenticating to a PostgreSQL database account with an empty password was possible despite libpq last seen 2020-06-01 modified 2020-06-02 plugin id 119231 published 2018-11-27 reporter This script is Copyright (C) 2018 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/119231 title Virtuozzo 6 : postgresql / postgresql-contrib / postgresql-devel / etc (VZLSA-2017-2860) NASL family Amazon Linux Local Security Checks NASL id ALA_ALAS-2017-908.NASL description The pg_user_mappings view discloses passwords to users lacking server privileges : An authorization flaw was found in the way PostgreSQL handled access to the pg_user_mappings view on foreign servers. A remote authenticated attacker could potentially use this flaw to retrieve passwords from the user mappings defined by the foreign server owners without actually having the privileges to do so. (CVE-2017-7547) Empty password accepted in some authentication methods : It was found that authenticating to a PostgreSQL database account with an empty password was possible despite libpq last seen 2020-06-01 modified 2020-06-02 plugin id 103755 published 2017-10-11 reporter This script is Copyright (C) 2017-2018 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/103755 title Amazon Linux AMI : postgresql96 (ALAS-2017-908) NASL family Oracle Linux Local Security Checks NASL id ORACLELINUX_ELSA-2017-2728.NASL description From Red Hat Security Advisory 2017:2728 : 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). The following packages have been upgraded to a later upstream version: postgresql (9.2.23). (BZ#1484639, BZ#1484647) Security Fix(es) : * It was found that authenticating to a PostgreSQL database account with an empty password was possible despite libpq last seen 2020-06-01 modified 2020-06-02 plugin id 103238 published 2017-09-15 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/103238 title Oracle Linux 7 : postgresql (ELSA-2017-2728) NASL family Databases NASL id POSTGRESQL_20170810.NASL description The version of PostgreSQL installed on the remote host is 9.2.x prior to 9.2.22, 9.3.x prior to 9.3.18, 9.4.x prior to 9.4.13, 9.5.x prior to 9.5.8, or 9.6.x prior to 9.6.4. It is, therefore, affected by multiple vulnerabilities : - An authentication bypass flaw exists in that an empty password is accepted in some authentication methods. (CVE-2017-7546) - An information disclosure vulnerability exists in the last seen 2020-06-01 modified 2020-06-02 plugin id 102527 published 2017-08-16 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/102527 title PostgreSQL 9.2.x < 9.2.22 / 9.3.x < 9.3.18 / 9.4.x < 9.4.13 / 9.5.x < 9.5.8 / 9.6.x < 9.6.4 Multiple Vulnerabilities NASL family Amazon Linux Local Security Checks NASL id ALA_ALAS-2017-885.NASL description pg_user_mappings view discloses passwords to users lacking server privileges : An authorization flaw was found in the way PostgreSQL handled access to the pg_user_mappings view on foreign servers. A remote authenticated attacker could potentially use this flaw to retrieve passwords from the user mappings defined by the foreign server owners without actually having the privileges to do so. (CVE-2017-7547) Empty password accepted in some authentication methods : It was found that authenticating to a PostgreSQL database account with an empty password was possible despite libpq last seen 2020-06-01 modified 2020-06-02 plugin id 102873 published 2017-09-01 reporter This script is Copyright (C) 2017-2018 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/102873 title Amazon Linux AMI : postgresql94 / postgresql95 (ALAS-2017-885) NASL family Gentoo Local Security Checks NASL id GENTOO_GLSA-201710-06.NASL description The remote host is affected by the vulnerability described in GLSA-201710-06 (PostgreSQL: Multiple vulnerabilities) Multiple vulnerabilities have been discovered in PostgreSQL. Please review the referenced CVE identifiers for details. Impact : A remote attacker could escalate privileges, cause a Denial of Service condition, obtain passwords, cause a loss in information, or obtain sensitive information. Workaround : There is no known workaround at this time. last seen 2020-06-01 modified 2020-06-02 plugin id 103724 published 2017-10-09 reporter This script is Copyright (C) 2017-2018 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/103724 title GLSA-201710-06 : PostgreSQL: Multiple vulnerabilities NASL family Ubuntu Local Security Checks NASL id UBUNTU_USN-3390-1.NASL description Ben de Graaff, Jelte Fennema, and Jeroen van der Ham discovered that PostgreSQL allowed the use of empty passwords in some authentication methods, contrary to expected behaviour. A remote attacker could use an empty password to authenticate to servers that were believed to have password login disabled. (CVE-2017-7546) Jeff Janes discovered that PostgreSQL incorrectly handled the pg_user_mappings catalog view. A remote attacker without server privileges could possibly use this issue to obtain certain passwords. (CVE-2017-7547) Chapman Flack discovered that PostgreSQL incorrectly handled lo_put() permissions. A remote attacker could possibly use this issue to change the data in a large object. (CVE-2017-7548). 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 102522 published 2017-08-16 reporter Ubuntu Security Notice (C) 2017-2019 Canonical, Inc. / NASL script (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/102522 title Ubuntu 14.04 LTS / 16.04 LTS / 17.04 : postgresql-9.3, postgresql-9.5, postgresql-9.6 vulnerabilities (USN-3390-1) NASL family SuSE Local Security Checks NASL id SUSE_SU-2017-2355-1.NASL description This update for postgresql94 fixes the following issues : - CVE-2017-7547: Further restrict visibility of pg_user_mappings.umoptions, to protect passwords stored as user mapping options. (bsc#1051685) - CVE-2017-7546: Disallow empty passwords in all password-based authentication methods. (bsc#1051684) - CVE-2017-7548: lo_put() function ignores ACLs. (bsc#1053259) Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-06-01 modified 2020-06-02 plugin id 102973 published 2017-09-06 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/102973 title SUSE SLED12 / SLES12 Security Update : postgresql94 (SUSE-SU-2017:2355-1)
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References
- http://www.debian.org/security/2017/dsa-3935
- http://www.debian.org/security/2017/dsa-3936
- http://www.securityfocus.com/bid/100278
- http://www.securitytracker.com/id/1039142
- https://access.redhat.com/errata/RHSA-2017:2677
- https://access.redhat.com/errata/RHSA-2017:2678
- https://access.redhat.com/errata/RHSA-2017:2728
- https://access.redhat.com/errata/RHSA-2017:2860
- https://security.gentoo.org/glsa/201710-06
- https://www.postgresql.org/about/news/1772/