PT-2021-5221 · Librecad+2 · Libdxfrw+2

Lilith >_> · Published 2021-08-04 · Updated 2023-05-21 · CVE-2021-21899

Positive Technologies (AI Summary)

CVSS v2.0

9.3

High

Base vector

AV:N/AC:M/Au:N/C:C/I:C/A:C

Name of the Vulnerable Software and Affected Versions LibreCad libdxfrw version 2.2.0-rc2-19-ge02f3580

Description A code execution issue exists in the dwgCompressor::copyCompBytes21 functionality due to a heap buffer overflow. This can be triggered by a specially-crafted .dwg file, allowing an attacker to execute arbitrary code.

Recommendations For LibreCad libdxfrw version 2.2.0-rc2-19-ge02f3580, as a temporary workaround, consider disabling the dwgCompressor::copyCompBytes21 function until a patch is available. Avoid using malicious .dwg files to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Buffer Overflow

Memory Corruption

Weakness Enumeration

CWE-119

CWE-787

Related Identifiers

BDU:2021-06023

CVE-2021-21899

DLA-2838-1

DSA-5077-1

MGASA-2022-0151

OPENSUSE-SU-2022:0067-1

OPENSUSE-SU-2024:11697-1

USN-5957-1

Affected Products

Linuxmint

Ubuntu

Libdxfrw

References · 46

• 🔥 https://talosintelligence.com/vulnerability_reports/TALOS-2021-1350 · Exploit
• https://ubuntu.com/security/CVE-2021-21899 · Vendor Advisory
• https://osv.dev/vulnerability/MGASA-2022-0151 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZTIAMP7QJDKV4ADDLR4GVVX2TXYLHVOZ · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-45341 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/[e-mail]/thread/RDI3HCTCACMIC7I4ILB3NRU6DCMADI5H · Vendor Advisory
• https://advisories.mageia.org/MGASA-2022-0151.html · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-21899 · Security Note
• https://ubuntu.com/security/notices/USN-5957-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-45342 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-21899 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2021-21899 · Vendor Advisory
• https://security.gentoo.org/glsa/202305-26 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2021-21899 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-21898 · Vendor Advisory