CVE-2026-111439

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

MEDIUM
4.3
CVSS Score
Published: October 19, 2026 at 07:59 AM UTC
Updated: October 19, 2026 at 08:56 PM UTC
1 product affected across 1 vendoropenGauss-server

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Severity
MEDIUM4.3
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

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。

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

3.0.0-3.0.53.1.0-3.1.15.0.0-5.0.35.0.0-RC15.1.06.0.0-6.0.66.0.0-RC17.0.0-RC1, 7.0.0-RC2, 7.0.0-RC3
Vendor states this is fixed in 7.0.0-LTS (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

4.3MEDIUMopenGauss
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-862

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