Reported

January 5, 2021

Issued

August 21, 2021 (last modified: June 13, 2023)

Package

csv-sniffer (crates.io)

Type

INFO Unsound

Categories

• memory-exposure

Aliases

• CVE-2021-45686
• GHSA-9783-42pm-x5jq
• GHSA-r67p-m7g9-gxw6

References

• https://github.com/jblondin/csv-sniffer/issues/1
• https://github.com/jblondin/csv-sniffer/pull/2

Patched

• >=0.2.0

Description

Affected versions of this crate passes an uninitialized buffer to a user-provided Read implementation (within fn preamble_skipcount()).

Arbitrary Read implementations can read from the uninitialized buffer (memory exposure) and also can return incorrect number of bytes written to the buffer. Reading from uninitialized memory produces undefined values that can quickly invoke undefined behavior.

Advisory available under CC0-1.0 license.