CVE-2020-21818

A heap based buffer overflow vulnerability exists in GNU LibreDWG 0.10.2641 via htmlescape ../../programs/escape.c:48.

CVSS v3 8.8 HIGH
CVSS v2.0 6.8 MEDIUM

8.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

6.8^/10

CVSS v2.0 : MEDIUM

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

Exploitability : 8.6 / Impact : 6.4

Access Vector NETWORK

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://github.com/LibreDWG/libredwg/issues/182#issuecomment-572891053	Exploit Issue Tracking Third Party Advisory
https://github.com/LibreDWG/libredwg/issues/182#issuecomment-572891053	Exploit Issue Tracking Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:gnu:libredwg:0.10.2641:*:*:*:*:*:*:*

History

09 Jul 2026, 00:16

Type	Values Removed	Values Added
References	~~{'url': 'http://gnu.com', 'tags': ['Not Applicable'], 'source': 'af854a3a-2127-422b-91ae-364da2661108'}~~

21 Nov 2024, 05:12

Type	Values Removed	Values Added
References	~~() http://gnu.com - Not Applicable~~	() http://gnu.com - Not Applicable
References	~~() https://github.com/LibreDWG/libredwg/issues/182#issuecomment-572891053 - Exploit, Issue Tracking, Third Party Advisory~~	() https://github.com/LibreDWG/libredwg/issues/182#issuecomment-572891053 - Exploit, Issue Tracking, Third Party Advisory

Information

Published : 2021-05-17 19:15

Updated : 2026-07-09 00:16

NVD link : CVE-2020-21818

Mitre link : CVE-2020-21818

CVE.ORG link : CVE-2020-21818

JSON object : View

Products Affected

gnu

libredwg

CWE

CWE-787

Out-of-bounds Write

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