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fix(security): pass db backup/restore identifiers via env vars to avoid injection

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The backup and restore command builders interpolated database name / user /
password directly into a 'docker exec ... {bash,sh} -c "..."' string executed
via execAsync / execAsyncRemote. Because the values sit inside the outer shell's
double quotes, a simple quote() is insufficient: the outer shell expands $(),
backticks and $VAR before the inner quoting applies (double-nested shell).

Values are now passed to the container as environment variables (docker exec -e
VAR=<shell-quoted>) and referenced as "$VAR" inside a single-quoted inner
script, so they never enter the inner command text and cannot break out of
either shell layer. The rest of each command (pg_dump/mysqldump/etc., flags,
| gzip) is unchanged.

Closes GHSA-qc73-mp78-4833, GHSA-qf8x-98cv-92qh, GHSA-ww4j-wjrr-rq8v, GHSA-7m3w-rm5f-h4fr, GHSA-f7mp-9jfp-mjrr
This commit is contained in:
Mauricio Siu
2026-07-19 22:54:44 -06:00
parent 89effbe395
commit ccd2e83c57
3 changed files with 125 additions and 9 deletions
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16
packages/server/src/utils/backups/utils.ts
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@@ -2,6 +2,7 @@ import { logger } from "@dokploy/server/lib/logger";
import type { BackupSchedule } from "@dokploy/server/services/backup";
import type { Destination } from "@dokploy/server/services/destination";
import { scheduledJobs, scheduleJob } from "node-schedule";
import { quote } from "shell-quote";
import { keepLatestNBackups } from ".";
import { runComposeBackup } from "./compose";
import { runLibsqlBackup } from "./libsql";
@@ -90,11 +91,16 @@ export const getS3Credentials = (destination: Destination) => {
return rcloneFlags;
};
// User-controlled values (database name, user, password) are passed to the
// container as environment variables via `docker exec -e VAR=<escaped>` and
// referenced as "$VAR" inside the inner shell, so they never appear in the
// inner command text. The -e value is escaped for the outer shell with
// shell-quote; the inner script is single-quoted and reads the env vars.
export const getPostgresBackupCommand = (
database: string,
databaseUser: string,
) => {
return `docker exec -i $CONTAINER_ID bash -c "set -o pipefail; pg_dump -Fc --no-acl --no-owner -h localhost -U ${databaseUser} --no-password '${database}' | gzip"`;
return `docker exec -e DB_NAME=${quote([database])} -e DB_USER=${quote([databaseUser])} -i $CONTAINER_ID bash -c 'set -o pipefail; pg_dump -Fc --no-acl --no-owner -h localhost -U "$DB_USER" --no-password "$DB_NAME" | gzip'`;
};
export const getMariadbBackupCommand = (
@@ -102,14 +108,14 @@ export const getMariadbBackupCommand = (
databaseUser: string,
databasePassword: string,
) => {
return `docker exec -i $CONTAINER_ID bash -c "set -o pipefail; mariadb-dump --user='${databaseUser}' --password='${databasePassword}' --single-transaction --quick --databases ${database} | gzip"`;
return `docker exec -e DB_NAME=${quote([database])} -e DB_USER=${quote([databaseUser])} -e DB_PASS=${quote([databasePassword])} -i $CONTAINER_ID bash -c 'set -o pipefail; mariadb-dump --user="$DB_USER" --password="$DB_PASS" --single-transaction --quick --databases "$DB_NAME" | gzip'`;
};
export const getMysqlBackupCommand = (
database: string,
databasePassword: string,
) => {
return `docker exec -i $CONTAINER_ID bash -c "set -o pipefail; mysqldump --default-character-set=utf8mb4 -u 'root' --password='${databasePassword}' --single-transaction --no-tablespaces --quick '${database}' | gzip"`;
return `docker exec -e DB_NAME=${quote([database])} -e DB_PASS=${quote([databasePassword])} -i $CONTAINER_ID bash -c 'set -o pipefail; mysqldump --default-character-set=utf8mb4 -u root --password="$DB_PASS" --single-transaction --no-tablespaces --quick "$DB_NAME" | gzip'`;
};
export const getMongoBackupCommand = (
@@ -117,11 +123,11 @@ export const getMongoBackupCommand = (
databaseUser: string,
databasePassword: string,
) => {
return `docker exec -i $CONTAINER_ID bash -c "set -o pipefail; mongodump -d '${database}' -u '${databaseUser}' -p '${databasePassword}' --archive --authenticationDatabase admin --gzip"`;
return `docker exec -e DB_NAME=${quote([database])} -e DB_USER=${quote([databaseUser])} -e DB_PASS=${quote([databasePassword])} -i $CONTAINER_ID bash -c 'set -o pipefail; mongodump -d "$DB_NAME" -u "$DB_USER" -p "$DB_PASS" --archive --authenticationDatabase admin --gzip'`;
};
export const getLibsqlBackupCommand = (database: string) => {
return `docker exec -i $CONTAINER_ID sh -c "tar cf - -C /var/lib/sqld ${database} | gzip"`;
return `docker exec -e DB_NAME=${quote([database])} -i $CONTAINER_ID sh -c 'tar cf - -C /var/lib/sqld "$DB_NAME" | gzip'`;
};
export const getServiceContainerCommand = (appName: string) => {