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Validate cipher updates with revision date

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Prevent clients from updating a cipher if the local copy is stale.
Validation is only performed when the client provides its last known
revision date; this date isn't provided when using older clients,
or when the operation doesn't involve updating an existing cipher.

Upstream PR: https://github.com/bitwarden/server/pull/994
This commit is contained in:
Jeremy Lin 2020-12-05 16:22:20 -08:00
parent 9824d94a1c
commit a9e9a397d8
1 changed files with 21 additions and 1 deletions
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22
src/api/core/ciphers.rs
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@ -1,6 +1,7 @@
use std::collections::{HashMap, HashSet};
use std::path::Path;
use chrono::{NaiveDateTime, Utc};
use rocket::{http::ContentType, request::Form, Data, Route};
use rocket_contrib::json::Json;
use serde_json::Value;
@ -194,6 +195,14 @@ pub struct CipherData {
#[serde(rename = "Attachments")]
_Attachments: Option<Value>, // Unused, contains map of {id: filename}
Attachments2: Option<HashMap<String, Attachments2Data>>,
// The revision datetime (in ISO 8601 format) of the client's local copy
// of the cipher. This is used to prevent a client from updating a cipher
// when it doesn't have the latest version, as that can result in data
// loss. It's not an error when no value is provided; this can happen
// when using older client versions, or if the operation doesn't involve
// updating an existing cipher.
LastKnownRevisionDate: Option<String>,
}
#[derive(Deserialize, Debug)]
@ -238,6 +247,17 @@ pub fn update_cipher_from_data(
nt: &Notify,
ut: UpdateType,
) -> EmptyResult {
// Check that the client isn't updating an existing cipher with stale data.
if let Some(dt) = data.LastKnownRevisionDate {
match NaiveDateTime::parse_from_str(&dt, "%+") { // ISO 8601 format
Err(err) =>
warn!("Error parsing LastKnownRevisionDate '{}': {}", dt, err),
Ok(dt) if cipher.updated_at.signed_duration_since(dt).num_seconds() > 1 =>
err!("The client copy of this cipher is out of date. Resync the client and try again."),
Ok(_) => (),
}
}
if cipher.organization_uuid.is_some() && cipher.organization_uuid != data.OrganizationId {
err!("Organization mismatch. Please resync the client before updating the cipher")
}
@ -1030,7 +1050,7 @@ fn _delete_cipher_by_uuid(uuid: &str, headers: &Headers, conn: &DbConn, soft_del
}
if soft_delete {
cipher.deleted_at = Some(chrono::Utc::now().naive_utc());
cipher.deleted_at = Some(Utc::now().naive_utc());
cipher.save(&conn)?;
nt.send_cipher_update(UpdateType::CipherUpdate, &cipher, &cipher.update_users_revision(&conn));
} else {