What is CVE-2021-45342?

CVE-2021-45342 is a high-severity vulnerability in Librecad, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.8/10. Published 2022-01-25.

How severe is CVE-2021-45342?

High severity. CVSS v3 base score is 7.8 out of 10.

Buffer overflow in Librecad

CVE-2021-45342

A buffer overflow vulnerability in CDataList of the jwwlib component of LibreCAD 2.2.0-rc3 and older allows an attacker to achieve Remote Code Execution using a crafted JWW document.

Vulnerability class: Buffer Overflow

Published 2022-01-25 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.019 (79.3th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 79th percentile — 79.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.019 · newest: 0.019 · change: 0.000

Affected products

Librecad — versions 2.2.0
Debian Linux — versions 10.0, 11.0
Fedoraproject Fedora — versions 34, 35

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

References

github.com/LibreCAD/LibreCAD/issues/1464 (Exploit, Third Party Advisory, Issue Tracking)
lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
www.debian.org/security/2022/dsa-5077 (vendor-advisory, Third Party Advisory)
lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
security.gentoo.org/glsa/202305-26 (vendor-advisory)

Frequently asked questions

What is CVE-2021-45342?: CVE-2021-45342 is a high-severity vulnerability in Librecad, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.8/10. Published 2022-01-25.
How severe is CVE-2021-45342?: High severity. CVSS v3 base score is 7.8 out of 10.