SB2021112225 - Fedora EPEL 7 update for libdxfrw, librecad
Published: November 22, 2021
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 3 vulnerabilities.
1) Out-of-bounds write (CVE-ID: CVE-2021-21898)
CWE-ID: CWE-787 - Out-of-bounds write
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
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)
CWE-ID: CWE-119 - Memory corruption
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
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)
CWE-ID: CWE-416 - Use After Free
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
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.