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Ubuntu Security Notice USN-5957-1
March 15, 2023

librecad vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 ESM

Summary:

Several security issues were fixed in LibreCAD.

Software Description:
- librecad: Computer-aided design (CAD) system

Details:

Cody Sixteen discovered that LibreCAD incorrectly
handled memory when parsing DXF files. An attacker could
use this issue to cause LibreCAD to crash, leading to a
denial of service. This issue only affected
Ubuntu 16.04 ESM and Ubuntu 18.04 ESM. (CVE-2018-19105)

Lilith of Cisco Talos discovered that LibreCAD incorrectly
handled memory when parsing DWG files. An attacker could
use this issue to cause LibreCAD to crash, leading to a
denial of service, or possibly execute arbitrary code.
(CVE-2021-21898, CVE-2021-21899)

Lilith of Cisco Talos discovered that LibreCAD incorrectly
handled memory when parsing DRW files. An attacker could
use this issue to cause LibreCAD to crash, leading to a
denial of service, or possibly execute arbitrary code.
(CVE-2021-21900)

Albin Eldstål-Ahrens discovered that LibreCAD incorrectly
handled memory when parsing JWW files. An attacker could
use this issue to cause LibreCAD to crash, leading to a
denial of service, or possibly execute arbitrary code.
(CVE-2021-45341, CVE-2021-45342)

Albin Eldstål-Ahrens discovered that LibreCAD incorrectly
handled memory when parsing DXF files. An attacker could
use this issue to cause LibreCAD to crash, leading to a
denial of service. (CVE-2021-45343)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 20.04 LTS:
   librecad                        2.1.3-1.2+deb10u1build0.20.04.1

Ubuntu 18.04 LTS:
   librecad                        2.1.2-1ubuntu0.1~esm1

Ubuntu 16.04 ESM:
   librecad                        2.0.9-2ubuntu0.1~esm1

In general, a standard system update will make all the necessary changes.

References:
   https://ubuntu.com/security/notices/USN-5957-1
   CVE-2018-19105, CVE-2021-21898, CVE-2021-21899, CVE-2021-21900,
   CVE-2021-45341, CVE-2021-45342, CVE-2021-45343

Package Information:
https://launchpad.net/ubuntu/+source/librecad/2.1.3-1.2+deb10u1build0.20.04.1
https://launchpad.net/ubuntu/+source/librecad/2.1.2-1ubuntu0.1~esm1