CVE-2026-111438

check_hba_replication 认证与访问控制绕过

Published Oct 19, 2026 CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed

Description

在 openGauss-server 的 src/common/backend/libpq/hba.cpp 中，复制连接认证存在访问控制绕过。hba_getauthmethod() 在处理 HADR/SW 复制发送方时，不要求 is_node_internal_connection()，直接调用 check_hba_replication()。check_hba_replication() 仅按 replication 标记做弱匹配，缺少普通 check_hba() 中的远程 trust 禁止等完整校验。因此，非内部网络的 HADR/SW 复制连接可绕过内部连接限制和完整 pg_hba 策略完成认证，进而通过复制协议读取备份与日志数据。

此问题随 HADR 复制发送方绕过内部连接校验进入代码，自 3.0.0 起即存在。受影响版本包括 3.0.x、3.1.x、5.0.x、5.1.0、6.0.x，以及 7.0.0-RC1、7.0.0-RC2、7.0.0-RC3。该问题已在 7.0.0-LTS版本修复，通过要求 HADR/SW 复制发送方必须经过 is_node_internal_connection 校验，使外部复制连接改走普通 check_hba() 并触发禁止远程 trust 策略。修复pr见https://gitcode.com/opengauss/openGauss-server/pull/9757。

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

openGauss-server

unaffected

Version	Status	Constraints
`7.0.0-LTS`	unaffected	—
`3.0.0-3.0.5`	affected	—
`3.1.0-3.1.1`	affected	—
`5.0.0-RC1`	affected	—
`5.0.0-5.0.3`	affected	—
`6.0.0-RC1`	affected	—
`6.0.0-6.0.6`	affected	—
`7.0.0-RC1, 7.0.0-RC2, 7.0.0-RC3`	affected	—

No data.

Vendor Product Versions

Opengauss-server

Version	Status	Scheme	Platform
`7.0.0-LTS`	unaffected	semver	['openeuler', 'centos']
`[3.0.0,3.0.5]`	affected	semver	['openeuler', 'centos']
`[3.1.0,3.1.1]`	affected	semver	['openeuler', 'centos']
`5.0.0-RC1`	affected	semver	['openeuler', 'centos']
`[5.0.0,5.0.3]`	affected	semver	['openeuler', 'centos']
`6.0.0-RC1`	affected	semver	['openeuler', 'centos']
`[6.0.0,6.0.6]`	affected	semver	['openeuler', 'centos']
`7.0.0-RC1`	affected	semver	['openeuler', 'centos']
`7.0.0-RC2`	affected	semver	['openeuler', 'centos']
`7.0.0-RC3`	affected	semver	['openeuler', 'centos']

Remediation

No solution or workaround provided in the CVE record

Tracking

Advisories

No advisories available

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required High

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.361% probability within 30 days)

Exploitation none

Automatable no

Technical Impact total

References

Link	Providers
https://gitcode.com/opengauss/openGauss-server/pull/9757

History

Oct 21, 2026 5:15 PM First appearance in the feed. Affected vendors updated View changes

Type	Values Removed	Values Added
First Time appeared		Opengauss-server Opengauss-server opengauss-server
Vendors & Products		Opengauss-server Opengauss-server opengauss-server

Oct 19, 2026 6:30 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}`

Oct 19, 2026 8:45 AM Description updated. Title updated. Weaknesses updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
Description		在 openGauss-server 的 src/common/backend/libpq/hba.cpp 中，复制连接认证存在访问控制绕过。hba_getauthmethod() 在处理 HADR/SW 复制发送方时，不要求 is_node_internal_connection()，直接调用 check_hba_replication()。check_hba_replication() 仅按 replication 标记做弱匹配，缺少普通 check_hba() 中的远程 trust 禁止等完整校验。因此，非内部网络的 HADR/SW 复制连接可绕过内部连接限制和完整 pg_hba 策略完成认证，进而通过复制协议读取备份与日志数据。此问题随 HADR 复制发送方绕过内部连接校验进入代码，自 3.0.0 起即存在。受影响版本包括 3.0.x、3.1.x、5.0.x、5.1.0、6.0.x，以及 7.0.0-RC1、7.0.0-RC2、7.0.0-RC3。该问题已在 7.0.0-LTS版本修复，通过要求 HADR/SW 复制发送方必须经过 is_node_internal_connection 校验，使外部复制连接改走普通 check_hba() 并触发禁止远程 trust 策略。修复pr见https://gitcode.com/opengauss/openGauss-server/pull/9757。
Title		check_hba_replication 认证与访问控制绕过
Weaknesses		CWE-288
References		https://gitcode.com/opengauss/openGauss-server/pull/9757
Metrics		cvssV3_1 `{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N'}`