CVE-2023-5870

A flaw was found in PostgreSQL involving the pg_cancel_backend role that signals background workers, including the logical replication launcher, autovacuum workers, and the autovacuum launcher. Successful exploitation requires a non-core extension with a less-resilient background worker and would affect that specific background worker only. This issue may allow a remote high privileged user to launch a denial of service (DoS) attack.

A flaw was found in PostgreSQL involving the pg_cancel_backend role that signals background workers, including the logical replication launcher, autovacuum workers, and the autovacuum launcher. Successful exploitation requires a non-core extension with a less-resilient background worker and would affect that specific background worker only. This issue may allow a remote high privileged user to launch a denial of service (DoS) attack.

A flaw was found in PostgreSQL involving the pg_cancel_backend role that signals background workers, including the logical replication launcher, autovacuum workers, and the autovacuum launcher. Successful exploitation requires a non-core extension with a less-resilient background worker and would affect that specific background worker only. This issue may allow a remote high privileged user to launch a denial of service (DoS) attack.

PostgreSQL is a powerful, open source object-relational database system that uses and extends the SQL language combined with many features that safely store and scale the most complicated data workloads. This package provides the essential shared library for any PostgreSQL client program or interface.

Security Fix(es):

A memory disclosure vulnerability was found in PostgreSQL that allows remote users to access sensitive information by exploiting certain aggregate function calls with 'unknown'-type arguments. Handling 'unknown'-type values from string literals without type designation can disclose bytes, potentially revealing notable and confidential information. This issue exists due to excessive data output in aggregate function calls, enabling remote users to read some portion of system memory.(CVE-2023-5868)

A flaw was found in PostgreSQL that allows authenticated database users to execute arbitrary code through missing overflow checks during SQL array value modification. This issue exists due to an integer overflow during array modification where a remote user can trigger the overflow by providing specially crafted data. This enables the execution of arbitrary code on the target system, allowing users to write arbitrary bytes to memory and extensively read the server's memory.(CVE-2023-5869)

A flaw was found in PostgreSQL involving the pg_cancel_backend role that signals background workers, including the logical replication launcher, autovacuum workers, and the autovacuum launcher. Successful exploitation requires a non-core extension with a less-resilient background worker and would affect that specific background worker only. This issue may allow a remote high privileged user to launch a denial of service (DoS) attack.(CVE-2023-5870)

Late privilege drop in REFRESH MATERIALIZED VIEW CONCURRENTLY in PostgreSQL allows an object creator to execute arbitrary SQL functions as the command issuer. The command intends to run SQL functions as the owner of the materialized view, enabling safe refresh of untrusted materialized views. The victim is a superuser or member of one of the attacker's roles. The attack requires luring the victim into running REFRESH MATERIALIZED VIEW CONCURRENTLY on the attacker's materialized view. Versions before PostgreSQL 16.2, 15.6, 14.11, 13.14, and 12.18 are affected.(CVE-2024-0985)

Incomplete tracking in PostgreSQL of tables with row security allows a reused query to view or change different rows from those intended. CVE-2023-2455 and CVE-2016-2193 fixed most interaction between row security and user ID changes. They missed cases where a subquery, WITH query, security invoker view, or SQL-language function references a table with a row-level security policy. This has the same consequences as the two earlier CVEs. That is to say, it leads to potentially incorrect policies being applied in cases where role-specific policies are used and a given query is planned under one role and then executed under other roles. This scenario can happen under security definer functions or when a common user and query is planned initially and then re-used across multiple SET ROLEs. Applying an incorrect policy may permit a user to complete otherwise-forbidden reads and modifications. This affects only databases that have used CREATE POLICY to define a row security policy. An attacker must tailor an attack to a particular application's pattern of query plan reuse, user ID changes, and role-specific row security policies. Versions before PostgreSQL 17.1, 16.5, 15.9, 14.14, 13.17, and 12.21 are affected.(CVE-2024-10976)

Client use of server error message in PostgreSQL allows a server not trusted under current SSL or GSS settings to furnish arbitrary non-NUL bytes to the libpq application. For example, a man-in-the-middle attacker could send a long error message that a human or screen-scraper user of psql mistakes for valid query results. This is…

PostgreSQL is an advanced Object-Relational database management system (DBMS). The base postgresql package contains the client programs that you'll need to access a PostgreSQL DBMS server, as well as HTML documentation for the whole system. These client programs can be located on the same machine as the PostgreSQL server, or on a remote machine that accesses a PostgreSQL server over a network connection. The PostgreSQL server can be found in the postgresql-server sub-package.

Security Fix(es):

A flaw was found in postgresql. A purpose-crafted query can read arbitrary bytes of server memory. In the default configuration, any authenticated database user can complete this attack at will. The attack does not require the ability to create objects. If server settings include max_worker_processes=0, the known versions of this attack are infeasible. However, undiscovered variants of the attack may be independent of that setting.(CVE-2021-3677)

IN THE EXTENSION SCRIPT, a SQL Injection vulnerability was found in PostgreSQL if it uses @extowner@, @extschema@, or @extschema:...@ inside a quoting construct (dollar quoting, '', or ""). If an administrator has installed files of a vulnerable, trusted, non-bundled extension, an attacker with database-level CREATE privilege can execute arbitrary code as the bootstrap superuser.(CVE-2023-39417)

A memory disclosure vulnerability was found in PostgreSQL that allows remote users to access sensitive information by exploiting certain aggregate function calls with 'unknown'-type arguments. Handling 'unknown'-type values from string literals without type designation can disclose bytes, potentially revealing notable and confidential information. This issue exists due to excessive data output in aggregate function calls, enabling remote users to read some portion of system memory.(CVE-2023-5868)

A flaw was found in PostgreSQL that allows authenticated database users to execute arbitrary code through missing overflow checks during SQL array value modification. This issue exists due to an integer overflow during array modification where a remote user can trigger the overflow by providing specially crafted data. This enables the execution of arbitrary code on the target system, allowing users to write arbitrary bytes to memory and extensively read the server's memory.(CVE-2023-5869)

A flaw was found in PostgreSQL involving the pg_cancel_backend role that signals background workers, including the logical replication launcher, autovacuum workers, and the autovacuum launcher. Successful exploitation requires a non-core extension with a less-resilient background worker and would affect that specific background worker only. This issue may allow a remote high privileged user to launch a denial of service (DoS) attack.(CVE-2023-5870)

Late privilege drop in REFRESH MATERIALIZED VIEW CONCURRENTLY in PostgreSQL allows an object creator to execute arbitrary SQL functions as the command issuer. The command intends to run SQL functions as the owner of the materialized view, enabling safe refresh of untrusted materialized views. The victim is a superuser or member of one of the attacker's roles. The attack requires luring the victim into running REFRESH MATERIALIZED VIEW CONCURRENTLY on the attacker's materialized view. Versions before PostgreSQL 16.2, 15.6, 14.11, 13.14, and 12.18 are affected.(CVE-2024-0985)

Incomplete tracking in PostgreSQL of tables with row security allows a reused query to view or change different rows from those intended. CVE-2023-2455 and CVE-2016-2193 fixed most interaction between row security and user ID changes. They missed cases where a subquery, WITH query, security invoker view, or SQL-language function references a table with a row-level security policy. This has the same consequences as the two earlier CVEs. That is to say, it leads to potentially incorrect policies being applied in cases where…

PostgreSQL is an advanced object-relational database management system (DBMS).

Security Fix(es):

• postgresql: Buffer overrun from integer overflow in array modification (CVE-2023-5869)

• postgresql: Memory disclosure in aggregate function calls (CVE-2023-5868)

• postgresql: extension script @substitutions@ within quoting allow SQL injection (CVE-2023-39417)

• postgresql: Role pg_signal_backend can signal certain superuser processes. (CVE-2023-5870)

• postgresql: MERGE fails to enforce UPDATE or SELECT row security policies (CVE-2023-39418)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

A flaw was found in PostgreSQL involving the pg_cancel_backend role that signals background workers, including the logical replication launcher, autovacuum workers, and the autovacuum launcher. Successful exploitation requires a non-core extension with a less-resilient background worker and would affect that specific background worker only. This issue may allow a remote high privileged user to launch a denial of service (DoS) attack.

PostgreSQL is an advanced object-relational database management system (DBMS).

Security Fix(es):

• postgresql: Buffer overrun from integer overflow in array modification (CVE-2023-5869)
• postgresql: Memory disclosure in aggregate function calls (CVE-2023-5868)
• postgresql: extension script @substitutions@ within quoting allow SQL injection (CVE-2023-39417)
• postgresql: Role pg_signal_backend can signal certain superuser processes. (CVE-2023-5870)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

PostgreSQL is an advanced object-relational database management system (DBMS).

Security Fix(es):

• postgresql: Buffer overrun from integer overflow in array modification (CVE-2023-5869)
• postgresql: Memory disclosure in aggregate function calls (CVE-2023-5868)
• postgresql: extension script @substitutions@ within quoting allow SQL injection (CVE-2023-39417)
• postgresql: Role pg_signal_backend can signal certain superuser processes. (CVE-2023-5870)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

PostgreSQL is an advanced object-relational database management system (DBMS).

Security Fix(es):

• postgresql: Buffer overrun from integer overflow in array modification (CVE-2023-5869)
• postgresql: Memory disclosure in aggregate function calls (CVE-2023-5868)
• postgresql: extension script @substitutions@ within quoting allow SQL injection (CVE-2023-39417)
• postgresql: Role pg_signal_backend can signal certain superuser processes. (CVE-2023-5870)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

PostgreSQL is an advanced object-relational database management system (DBMS).

Security Fix(es):

• postgresql: Buffer overrun from integer overflow in array modification (CVE-2023-5869)
• postgresql: Memory disclosure in aggregate function calls (CVE-2023-5868)
• postgresql: extension script @substitutions@ within quoting allow SQL injection (CVE-2023-39417)
• postgresql: Role pg_signal_backend can signal certain superuser processes. (CVE-2023-5870)
• postgresql: MERGE fails to enforce UPDATE or SELECT row security policies (CVE-2023-39418)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

PostgreSQL is an advanced object-relational database management system (DBMS).

Security Fix(es):

• postgresql: Buffer overrun from integer overflow in array modification (CVE-2023-5869)
• postgresql: Memory disclosure in aggregate function calls (CVE-2023-5868)
• postgresql: extension script @substitutions@ within quoting allow SQL injection (CVE-2023-39417)
• postgresql: Role pg_signal_backend can signal certain superuser processes. (CVE-2023-5870)
• postgresql: MERGE fails to enforce UPDATE or SELECT row security policies (CVE-2023-39418)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

A flaw was found in PostgreSQL involving the pg_cancel_backend role that signals background workers, including the logical replication launcher, autovacuum workers, and the autovacuum launcher. Successful exploitation requires a non-core extension with a less-resilient background worker and would affect that specific background worker only. This issue may allow a remote high privileged user to launch a denial of service (DoS) attack.

• SECURITY UPDATE: Memory disclosure in aggregate function calls
  • debian/patches/CVE-2023-5868.patch: Compute aggregate argument types correctly in transformAggregateCall().
  • CVE-2023-5868
• SECURITY UPDATE: Role "pg_signal_backend" can signal certain superuser processes
  • debian/patches/CVE-2023-5870.patch: Ban role pg_signal_backend from more superuser backend.
  • CVE-2023-5870 -- Vladimir D. Seleznev [email protected] Thu, 25 Jan 2024 21:31:25 +0200

The updated packages fix security vulnerabilities:

Memory disclosure in aggregate function calls. (CVE-2023-5868)

Buffer overrun from integer overflow in array modification. (CVE-2023-5869)

Role pg_signal_backend can signal certain superuser processes. (CVE-2023-5870)

These are all security issues fixed in the postgresql11-11.22-1.1 package on the GA media of openSUSE Tumbleweed.

These are all security issues fixed in the postgresql13-13.13-1.1 package on the GA media of openSUSE Tumbleweed.

These are all security issues fixed in the postgresql14-14.10-1.1 package on the GA media of openSUSE Tumbleweed.

These are all security issues fixed in the postgresql15-15.5-1.1 package on the GA media of openSUSE Tumbleweed.

These are all security issues fixed in the libecpg6-16.1-1.1 package on the GA media of openSUSE Tumbleweed.

These are all security issues fixed in the postgresql12-12.18-1.1 package on the GA media of openSUSE Tumbleweed.

These are all security issues fixed in the postgresql17-17.6-2.1 package on the GA media of openSUSE Tumbleweed.

PostgreSQL is an advanced object-relational database management system (DBMS).

Security Fix(es):

• postgresql: Buffer overrun from integer overflow in array modification (CVE-2023-5869)

• postgresql: Memory disclosure in aggregate function calls (CVE-2023-5868)

• postgresql: extension script @substitutions@ within quoting allow SQL injection (CVE-2023-39417)

• postgresql: Role pg_signal_backend can signal certain superuser processes. (CVE-2023-5870)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

PostgreSQL is an advanced object-relational database management system (DBMS).

Security Fix(es):

• postgresql: Buffer overrun from integer overflow in array modification (CVE-2023-5869)

• postgresql: Memory disclosure in aggregate function calls (CVE-2023-5868)

• postgresql: extension script @substitutions@ within quoting allow SQL injection (CVE-2023-39417)

• postgresql: Role pg_signal_backend can signal certain superuser processes. (CVE-2023-5870)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

PostgreSQL is an advanced object-relational database management system (DBMS).

Security Fix(es):

• postgresql: Buffer overrun from integer overflow in array modification (CVE-2023-5869)

• postgresql: Memory disclosure in aggregate function calls (CVE-2023-5868)

• postgresql: extension script @substitutions@ within quoting allow SQL injection (CVE-2023-39417)

• postgresql: Role pg_signal_backend can signal certain superuser processes. (CVE-2023-5870)

• postgresql: MERGE fails to enforce UPDATE or SELECT row security policies (CVE-2023-39418)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

This update for postgresql14 fixes the following issues:

Security issues fixed:

• CVE-2023-5868: Fix handling of unknown-type arguments in DISTINCT 'any' aggregate functions. This error led to a text-type value being interpreted as an unknown-type value (that is, a zero-terminated string) at runtime. This could result in disclosure of server memory following the text value. (bsc#1216962)
• CVE-2023-5869: Detect integer overflow while computing new array dimensions. When assigning new elements to array subscripts that are outside the current array bounds, an undetected integer overflow could occur in edge cases. Memory stomps that are potentially exploitable for arbitrary code execution are possible, and so is disclosure of server memory. (bsc#1216961)
• CVE-2023-5870: Prevent the pg_signal_backend role from signalling background workers and autovacuum processes. The documentation says that pg_signal_backend cannot issue signals to superuser-owned processes. It was able to signal these background processes, though, because they advertise a role OID of zero. Treat that as indicating superuser ownership. The security implications of cancelling one of these process types are fairly small so far as the core code goes (we'll just start another one), but extensions might add background workers that are more vulnerable. Also ensure that the is_superuser parameter is set correctly in such processes. No specific security consequences are known for that oversight, but it might be significant for some extensions. (bsc#1216960)

• updated to 14.10 https://www.postgresql.org/docs/14/release-14-10.html
• Overhaul postgresql-README.SUSE and move it from the binary package to the noarch wrapper package.
• Change the unix domain socket location from /var/run to /run.