GHSA-V555-5G3C-VQ2X

Vulnerability from github – Published: 2026-06-30 15:30 – Updated: 2026-06-30 15:30
VLAI
Details

openGauss 在处理带 NLS 参数的 to_timestamp 调用时，to_timestamp_with_fmt_nls() 会将 nls_fmt_str 保存到 u_sess->parser_cxt.nls_fmt_str。在 seqscan + sort 执行路径下，该字符串原本被分配在 SeqScan 的表达式上下文中；当 SeqScan 完成后，该内存上下文会被 reset，但后续结果输出阶段 timestamp_out() 仍会通过 CheckNlsFormat() 访问 u_sess->parser_cxt.nls_fmt_str，导致访问已释放内存。攻击者在具备数据库 SQL 执行权限的情况下，可构造特定 to_timestamp(..., ..., nlsparam) 查询触发 heap-use-after-free。在 ASan/Memcheck 环境下表现为数据库服务退出；在实际运行环境中可能造成后端进程异常退出，影响数据库服务可用性，形成拒绝服务风险。该问题在openGauss-server-7.0.0-RC1版本和openGauss-server-7.0.0-RC2版本存在，目前已在openGauss-server-7.0.0-RC3版本修复。由于 openGauss-server-7.0.0-RC1版本和openGauss-server-7.0.0-RC2均为创新版本，不会发布针对性补丁包，涉及版本升级至 openGauss-server-7.0.0-RC3或更新版本即可。

Severity
5.9 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2026-14178"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-30T14:16:25Z",
    "severity": "MODERATE"
  },
  "details": "openGauss \u5728\u5904\u7406\u5e26 NLS \u53c2\u6570\u7684 to_timestamp \u8c03\u7528\u65f6\uff0cto_timestamp_with_fmt_nls() \u4f1a\u5c06 nls_fmt_str \u4fdd\u5b58\u5230 u_sess-\u003eparser_cxt.nls_fmt_str\u3002\u5728 seqscan + sort \u6267\u884c\u8def\u5f84\u4e0b\uff0c\u8be5\u5b57\u7b26\u4e32\u539f\u672c\u88ab\u5206\u914d\u5728 SeqScan \u7684\u8868\u8fbe\u5f0f\u4e0a\u4e0b\u6587\u4e2d\uff1b\u5f53 SeqScan \u5b8c\u6210\u540e\uff0c\u8be5\u5185\u5b58\u4e0a\u4e0b\u6587\u4f1a\u88ab reset\uff0c\u4f46\u540e\u7eed\u7ed3\u679c\u8f93\u51fa\u9636\u6bb5 timestamp_out() \u4ecd\u4f1a\u901a\u8fc7 CheckNlsFormat() \u8bbf\u95ee u_sess-\u003eparser_cxt.nls_fmt_str\uff0c\u5bfc\u81f4\u8bbf\u95ee\u5df2\u91ca\u653e\u5185\u5b58\u3002\u653b\u51fb\u8005\u5728\u5177\u5907\u6570\u636e\u5e93 SQL \u6267\u884c\u6743\u9650\u7684\u60c5\u51b5\u4e0b\uff0c\u53ef\u6784\u9020\u7279\u5b9a to_timestamp(..., ..., nlsparam) \u67e5\u8be2\u89e6\u53d1 heap-use-after-free\u3002\u5728 ASan/Memcheck \u73af\u5883\u4e0b\u8868\u73b0\u4e3a\u6570\u636e\u5e93\u670d\u52a1\u9000\u51fa\uff1b\u5728\u5b9e\u9645\u8fd0\u884c\u73af\u5883\u4e2d\u53ef\u80fd\u9020\u6210\u540e\u7aef\u8fdb\u7a0b\u5f02\u5e38\u9000\u51fa\uff0c\u5f71\u54cd\u6570\u636e\u5e93\u670d\u52a1\u53ef\u7528\u6027\uff0c\u5f62\u6210\u62d2\u7edd\u670d\u52a1\u98ce\u9669\u3002\u8be5\u95ee\u9898\u5728openGauss-server-7.0.0-RC1\u7248\u672c\u548copenGauss-server-7.0.0-RC2\u7248\u672c\u5b58\u5728\uff0c\u76ee\u524d\u5df2\u5728openGauss-server-7.0.0-RC3\u7248\u672c\u4fee\u590d\u3002\u7531\u4e8e\nopenGauss-server-7.0.0-RC1\u7248\u672c\u548copenGauss-server-7.0.0-RC2\u5747\u4e3a\u521b\u65b0\u7248\u672c\uff0c\u4e0d\u4f1a\u53d1\u5e03\u9488\u5bf9\u6027\u8865\u4e01\u5305\uff0c\u6d89\u53ca\u7248\u672c\u5347\u7ea7\u81f3\nopenGauss-server-7.0.0-RC3\u6216\u66f4\u65b0\u7248\u672c\u5373\u53ef\u3002",
  "id": "GHSA-v555-5g3c-vq2x",
  "modified": "2026-06-30T15:30:46Z",
  "published": "2026-06-30T15:30:46Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-14178"
    },
    {
      "type": "WEB",
      "url": "https://gitcode.com/opengauss/openGauss-server/pull/8877"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}



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