CVE-2026-6475
PostgreSQL pg_basebackup and pg_rewind can overwrite unrelated files of origin superuser choice
描述
Symlink following in PostgreSQL pg_basebackup plain format and in pg_rewind allows an origin superuser to overwrite local files, e.g. /var/lib/postgres/.bashrc, that hijack the operating system account. It will remain the case that starting the server after these commands implicitly trusts the origin superuser, due to features like shared_preload_libraries. Hence, the attack has practical implications only if one takes relevant action between these commands and server start, like moving the files to a different VM or snapshotting the VM. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.
如何修補 CVE-2026-6475
要修補 CVE-2026-6475,請將受影響套件升級到下列已修補版本。
- —升級至 15.18-r0 或更新版本
- —升級至 16.14-r0 或更新版本
- —升級至 17.10-r0 或更新版本
- —升級至 18.4-r0 或更新版本
- —升級至 14.23.0 或更新版本
- —升級至 13.23-0+deb11u4 或更新版本
- —升級至 15.18-0+deb12u1 或更新版本
- —升級至 17.10-0+deb13u1 或更新版本
- —升級至 18.4-1 或更新版本
CVE-2026-6475 正在被利用嗎?
低 — EPSS 為 0.3%,目前沒有觀察到大規模利用活動。
受影響套件(9)
- from 0, < 15.18-r0
- from 0, < 16.14-r0
- from 0, < 17.10-r0
- from 0, < 18.4-r0
- from 0, < 14.23.0, >= 15.0.0, < 15.18.0, >= 16.0.0, < 16.14.0, >= 17.0.0, < 17.10.0, >= 18.0.0, < 18.4.0
- from 0, < 13.23-0+deb11u4
- from 0, < 15.18-0+deb12u1
- from 0, < 17.10-0+deb13u1
- from 0, < 18.4-1
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH8.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |