Loading...
Skip to main content
GeekWala

CVE-2021-45703 — Use of Uninitialized Resource in tectonic_xdv —...

CRITICAL

Use of Uninitialized Resource in tectonic_xdv

Published January 6, 2022Updated November 8, 2023Source: osv

Summary

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.

Advisory Timeline

  • First published January 6, 2022 (1740 days ago).
  • Last revised November 8, 2023 — 670 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

Cargo
Update tectonic_xdv to 0.1.12 or later
cargo update -p tectonic_xdv --precise 0.1.12

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (1)

Affects 1 ecosystem: crates.io (1).

PackageEcosystemAffectedFixed In
tectonic_xdv
crates.io
All versions0.1.12

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 9.8 score means for each attack dimension.

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Frequently Asked Questions

What is CVE-2021-45703?
Use of Uninitialized Resource in tectonic_xdv This vulnerability has been assigned a severity rating of CRITICAL (CVSS score: 9.8/10).
How do I check if my project is affected by CVE-2021-45703?
CVE-2021-45703 affects tectonic_xdv. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2021-45703 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
9.8

Exploitation is straightforward and causes maximum impact. Patch immediately.

Also Known As

GHSA-qwvx-c8j7-5g75
GHSA-6692-8qqf-79jc
RUSTSEC-2021-0112

Related CVEs

More crates.io advisories

Check if you're affected

Scan your dependencies to see if this vulnerability affects your projects.

Scan Your Dependencies