Ecosyste.ms: Advisories

Security Advisories: GSA_kwCzR0hTQS02NjkyLThxcWYtNzlqY84AArs6

`Read` on uninitialized buffer may cause UB ('tectonic_xdv' crate)

Affected versions of this crate passes an uninitialized buffer to a user-provided Read implementation.

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.

The problem was fixed in commit cdff034 by zero-initializing the buffer before passing it to a user-provided Read implementation.

Permalink: https://github.com/advisories/GHSA-6692-8qqf-79jc
JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS02NjkyLThxcWYtNzlqY84AArs6
Source: GitHub Advisory Database
Origin: Unspecified
Severity: High
Classification: General
Published: over 2 years ago
Updated: over 1 year ago

Identifiers: GHSA-6692-8qqf-79jc
References:

• https://github.com/tectonic-typesetting/tectonic/issues/752
• https://rustsec.org/advisories/RUSTSEC-2021-0112.html
• https://github.com/tectonic-typesetting/tectonic/commit/cdff034e6d93cdfdafd13d8c6956e22fa5a57b79
• https://github.com/advisories/GHSA-6692-8qqf-79jc

Repository: https://github.com/tectonic-typesetting/tectonic
Blast Radius: 0.0

Affected Packages