CVE-2026-6475: PostgreSQL, обхождане на път

Описание

Оригинално описание

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.

Засегнати продукти

• n/a PostgreSQL: 18 преди 18.4; 17 преди 17.10; 16 преди 16.14; 15 преди 15.18; преди 14.23

Вид слабост

• CWE-61 Проследяване на символна връзка в UNIX (Symlink Following)

История

Първоизточници

• https://www.cve.org/CVERecord?id=CVE-2026-6475
• https://nvd.nist.gov/vuln/detail/CVE-2026-6475
• https://www.postgresql.org/support/security/CVE-2026-6475/