pg_read_binary_file_blocks 缺少初始用户权限校验，普通用户可读取 relation 文件块
Summary
| CVE | CVE-2026-111439 |
|---|---|
| State | PUBLISHED |
| Assigner | openGauss |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-10-19 08:17:02 UTC |
| Updated | 2026-10-19 20:56:36 UTC |
| Description | 在 openGauss-server的 src/common/backend/utils/adt/genfile.cpp 模块中，内置函数 pg_read_binary_file_blocks() 存在权限校验逻辑缺陷。该函数在入口处仅校验了起始块号（startBlockNum）和块数量（blockCount）的范围，随后直接调用底层文件读取例程 ReadBinaryFileBlocksFirstCall()。该底层例程仅执行了路径规范化检查以及针对 .. 路径遍历和数据目录边界的基本检查，缺失了对调用者数据库权限（如 SELECT 权限）的校验。此外，辅助函数 is_row_data_file() 也仅用于识别文件形态，未包含权限检查。因此，任何拥有普通数据库连接权限的用户，只要能够通过 pg_relation_filepath() 等函数获取到目标表的底层关系文件路径（例如压缩数据的 _compress 文件路径），即可无需具备该表的 SELECT 权限，直接读取表数据的二进制块。 此漏洞影响此前3.0.0到6.0.0间的所有版本及补丁版，并在7.0.0-LTS版本修复。修复patch详见：https://gitcode.com/opengauss/openGauss-server/pull/9374。 |
Risk And Classification
Primary CVSS: v3.1 4.3 MEDIUM from a1a479f7-907b-4ae8-a999-9148cadc9224
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
EPSS: 0.002590000 probability, percentile 0.164800000 (date 2026-10-19)
Problem Types: CWE-862 | CWE-862 CWE-862 Missing Authorization
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | a1a479f7-907b-4ae8-a999-9148cadc9224 | Secondary | 4.3 | MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |
| 3.1 | CNA | CVSS | 4.3 | MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
LowUser Interaction
NoneScope
UnchangedConfidentiality
LowIntegrity
NoneAvailability
NoneCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | OpenGauss-server | OpenGauss-server | unaffected 7.0.0-LTS | openEuler Centos |
| CNA | OpenGauss-server | OpenGauss-server | affected 3.0.0-3.0.5 | openEuler Centos |
| CNA | OpenGauss-server | OpenGauss-server | affected 3.1.0-3.1.1 | openEuler Centos |
| CNA | OpenGauss-server | OpenGauss-server | affected 5.0.0-RC1 | openEuler Centos |
| CNA | OpenGauss-server | OpenGauss-server | affected 5.0.0-5.0.3 | openEuler Centos |
| CNA | OpenGauss-server | OpenGauss-server | affected 5.1.0 | openEuler Centos |
| CNA | OpenGauss-server | OpenGauss-server | affected 6.0.0-RC1 | openEuler Centos |
| CNA | OpenGauss-server | OpenGauss-server | affected 6.0.0-6.0.6 | openEuler Centos |
| CNA | OpenGauss-server | OpenGauss-server | affected 7.0.0-RC1, 7.0.0-RC2, 7.0.0-RC3 | openEuler Centos |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| gitcode.com/opengauss/openGauss-server/pull/9374 | a1a479f7-907b-4ae8-a999-9148cadc9224 | gitcode.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.