pgsql: Run REFRESH MATERIALIZED VIEW CONCURRENTLY in right security con
Run REFRESH MATERIALIZED VIEW CONCURRENTLY in right security context The internal commands in REFRESH MATERIALIZED VIEW CONCURRENTLY are correctly executed in SECURITY_RESTRICTED_OPERATION mode, except for creating the temporary "diff" table, because you cannot create temporary tables in SRO mode. But creating the temporary "diff" table is a pretty complex CTAS command that selects from another temporary table created earlier in the command. If you can cajole that CTAS command to execute code defined by the table owner, the table owner can run code with the privileges of the user running the REFRESH command. The proof-of-concept reported to the security team relied on CREATE RULE to convert the internally-built temp table to a view. That's not possible since commit b23cd185fd, and I was not able to find a different way to turn the SELECT on the temp table into code execution, so as far as I know this is only exploitable in v15 and below. That's a fiddly assumption though, so apply this patch to master and all stable versions. Thanks to Pedro Gallegos for the report. Security: CVE-2023-5869 Reviewed-by: Noah Misch Branch -- REL_14_STABLE Details --- https://git.postgresql.org/pg/commitdiff/f4f2883521fc3f81765ab82eab2ffa31574f0a07 Modified Files -- src/backend/commands/matview.c | 33 ++--- 1 file changed, 26 insertions(+), 7 deletions(-)
pgsql: Run REFRESH MATERIALIZED VIEW CONCURRENTLY in right security con
Run REFRESH MATERIALIZED VIEW CONCURRENTLY in right security context The internal commands in REFRESH MATERIALIZED VIEW CONCURRENTLY are correctly executed in SECURITY_RESTRICTED_OPERATION mode, except for creating the temporary "diff" table, because you cannot create temporary tables in SRO mode. But creating the temporary "diff" table is a pretty complex CTAS command that selects from another temporary table created earlier in the command. If you can cajole that CTAS command to execute code defined by the table owner, the table owner can run code with the privileges of the user running the REFRESH command. The proof-of-concept reported to the security team relied on CREATE RULE to convert the internally-built temp table to a view. That's not possible since commit b23cd185fd, and I was not able to find a different way to turn the SELECT on the temp table into code execution, so as far as I know this is only exploitable in v15 and below. That's a fiddly assumption though, so apply this patch to master and all stable versions. Thanks to Pedro Gallegos for the report. Security: CVE-2023-5869 Reviewed-by: Noah Misch Branch -- REL_16_STABLE Details --- https://git.postgresql.org/pg/commitdiff/d6a61cb3bef3c8fbc35c2a6182e75a8c1d351e41 Modified Files -- src/backend/commands/matview.c | 33 ++--- 1 file changed, 26 insertions(+), 7 deletions(-)
pgsql: Run REFRESH MATERIALIZED VIEW CONCURRENTLY in right security con
Run REFRESH MATERIALIZED VIEW CONCURRENTLY in right security context The internal commands in REFRESH MATERIALIZED VIEW CONCURRENTLY are correctly executed in SECURITY_RESTRICTED_OPERATION mode, except for creating the temporary "diff" table, because you cannot create temporary tables in SRO mode. But creating the temporary "diff" table is a pretty complex CTAS command that selects from another temporary table created earlier in the command. If you can cajole that CTAS command to execute code defined by the table owner, the table owner can run code with the privileges of the user running the REFRESH command. The proof-of-concept reported to the security team relied on CREATE RULE to convert the internally-built temp table to a view. That's not possible since commit b23cd185fd, and I was not able to find a different way to turn the SELECT on the temp table into code execution, so as far as I know this is only exploitable in v15 and below. That's a fiddly assumption though, so apply this patch to master and all stable versions. Thanks to Pedro Gallegos for the report. Security: CVE-2023-5869 Reviewed-by: Noah Misch Branch -- REL_15_STABLE Details --- https://git.postgresql.org/pg/commitdiff/f2fdea198b3d0ab30b9e8478a762488ecebabd88 Modified Files -- src/backend/commands/matview.c | 33 ++--- 1 file changed, 26 insertions(+), 7 deletions(-)
pgsql: Run REFRESH MATERIALIZED VIEW CONCURRENTLY in right security con
Run REFRESH MATERIALIZED VIEW CONCURRENTLY in right security context The internal commands in REFRESH MATERIALIZED VIEW CONCURRENTLY are correctly executed in SECURITY_RESTRICTED_OPERATION mode, except for creating the temporary "diff" table, because you cannot create temporary tables in SRO mode. But creating the temporary "diff" table is a pretty complex CTAS command that selects from another temporary table created earlier in the command. If you can cajole that CTAS command to execute code defined by the table owner, the table owner can run code with the privileges of the user running the REFRESH command. The proof-of-concept reported to the security team relied on CREATE RULE to convert the internally-built temp table to a view. That's not possible since commit b23cd185fd, and I was not able to find a different way to turn the SELECT on the temp table into code execution, so as far as I know this is only exploitable in v15 and below. That's a fiddly assumption though, so apply this patch to master and all stable versions. Thanks to Pedro Gallegos for the report. Security: CVE-2023-5869 Reviewed-by: Noah Misch Branch -- master Details --- https://git.postgresql.org/pg/commitdiff/5a9167c3971211d6fe65ecdd83025625e4af0b8b Modified Files -- src/backend/commands/matview.c | 33 ++--- 1 file changed, 26 insertions(+), 7 deletions(-)
pgsql: Run REFRESH MATERIALIZED VIEW CONCURRENTLY in right security con
Run REFRESH MATERIALIZED VIEW CONCURRENTLY in right security context The internal commands in REFRESH MATERIALIZED VIEW CONCURRENTLY are correctly executed in SECURITY_RESTRICTED_OPERATION mode, except for creating the temporary "diff" table, because you cannot create temporary tables in SRO mode. But creating the temporary "diff" table is a pretty complex CTAS command that selects from another temporary table created earlier in the command. If you can cajole that CTAS command to execute code defined by the table owner, the table owner can run code with the privileges of the user running the REFRESH command. The proof-of-concept reported to the security team relied on CREATE RULE to convert the internally-built temp table to a view. That's not possible since commit b23cd185fd, and I was not able to find a different way to turn the SELECT on the temp table into code execution, so as far as I know this is only exploitable in v15 and below. That's a fiddly assumption though, so apply this patch to master and all stable versions. Thanks to Pedro Gallegos for the report. Security: CVE-2023-5869 Reviewed-by: Noah Misch Branch -- REL_13_STABLE Details --- https://git.postgresql.org/pg/commitdiff/d541ce3b6f0582723150f45d52eab119985d3c19 Modified Files -- src/backend/commands/matview.c | 33 ++--- 1 file changed, 26 insertions(+), 7 deletions(-)
pgsql: Run REFRESH MATERIALIZED VIEW CONCURRENTLY in right security con
Run REFRESH MATERIALIZED VIEW CONCURRENTLY in right security context The internal commands in REFRESH MATERIALIZED VIEW CONCURRENTLY are correctly executed in SECURITY_RESTRICTED_OPERATION mode, except for creating the temporary "diff" table, because you cannot create temporary tables in SRO mode. But creating the temporary "diff" table is a pretty complex CTAS command that selects from another temporary table created earlier in the command. If you can cajole that CTAS command to execute code defined by the table owner, the table owner can run code with the privileges of the user running the REFRESH command. The proof-of-concept reported to the security team relied on CREATE RULE to convert the internally-built temp table to a view. That's not possible since commit b23cd185fd, and I was not able to find a different way to turn the SELECT on the temp table into code execution, so as far as I know this is only exploitable in v15 and below. That's a fiddly assumption though, so apply this patch to master and all stable versions. Thanks to Pedro Gallegos for the report. Security: CVE-2023-5869 Reviewed-by: Noah Misch Branch -- REL_12_STABLE Details --- https://git.postgresql.org/pg/commitdiff/2699fc035a75d0774c1f013e9320882287f78adb Modified Files -- src/backend/commands/matview.c | 33 ++--- 1 file changed, 26 insertions(+), 7 deletions(-)
