Bug#1010349: librecad: CVE-2021-21897 - heap-based buffer overflow loading a DXF file via embedded dxflib

[Neil Williams]

Source: librecad
Version: 2.1.3-3
Severity: important
Tags: security
X-Debbugs-Cc: codehelp at debian.org, Debian Security Team <team at security.debian.org>

Hi,

The following vulnerability was published for librecad.

CVE-2021-21897[0]:
| A code execution vulnerability exists in the
| DL_Dxf::handleLWPolylineData functionality of Ribbonsoft dxflib
| 3.17.0. A specially-crafted .dxf file can lead to a heap buffer
| overflow. An attacker can provide a malicious file to trigger this
| vulnerability.


If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2021-21897
    https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21897

Please adjust the affected versions in the BTS as needed.


-- System Information:
Debian Release: bookworm/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 5.17.0-1-amd64 (SMP w/16 CPU threads; PREEMPT)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8), LANGUAGE=en_GB:en
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled