SB2021112223 - Fedora 33 update for libdxfrw, librecad

Description

This security bulletin contains information about 3 secuirty vulnerabilities.

1) Out-of-bounds write (CVE-ID: CVE-2021-21898)

The vulnerability allows a remote attacker to execute arbitrary code on the system.

The vulnerability exists due to a boundary error in the dwgCompressor::decompress18() function. A remote attacker can trick the victim into opening a specially crafted .dwg file, trigger out-of-bounds write and execute arbitrary code on the target system.

2) Buffer overflow (CVE-ID: CVE-2021-21899)

The vulnerability allows a remote attacker to execute arbitrary code on the system.

The vulnerability exists due to a boundary error in the dwgCompressor::copyCompBytes21 function. A remote attacker can trick the victim into opening a specially crafted .dwg file, trigger heap buffer overflow, and execute arbitrary code on the target system.

3) Use-after-free (CVE-ID: CVE-2021-21900)

The vulnerability allows a remote attacker to execute arbitrary code on the system.

The vulnerability exists due to a use-after-free error in the dxfRW::processLType() function. A remote attacker can trick the victim into opening a specially crafted .dwg file, trigger use-after-free, and execute arbitrary code on the target system.

Remediation

Install update from vendor's website.

References

• https://bodhi.fedoraproject.org/updates/FEDORA-2021-49ed4be7d5