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RUSTSEC-2021-0037

Fix a use-after-free bug in diesels Sqlite backend

Reported
Issued
Package
diesel (crates.io)
Type
Vulnerability
Categories
Keywords
#use-after-free
Aliases
References
CVSS Score
9.8 CRITICAL
CVSS Details
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Patched
  • >=1.4.6
Affected Functions
Version
diesel::SqliteConnection::query_by_name
  • <1.4.6

Description

We've misused sqlite3_column_name. The SQLite documentation states that the following:

The returned string pointer is valid until either the prepared statement is destroyed by sqlite3_finalize() or until the statement is automatically reprepared by the first call to sqlite3_step() for a particular run or until the next call to sqlite3_column_name() or sqlite3_column_name16() on the same column.

As part of our query_by_name infrastructure we've first received all field names for the prepared statement and stored them as string slices for later use. After that we called sqlite3_step() for the first time, which invalids the pointer and therefore the stored string slice.

Advisory available under CC0-1.0 license.