GNU LibreDWG 0.10 bits.c bit_calc_CRC heap-based overflow

CVSS Meta Temp Score
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CTI Interest Score
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7.1$0-$5k0.00

Summaryinfo

A vulnerability was found in GNU LibreDWG 0.10. It has been rated as critical. Affected is the function bit_calc_CRC of the file bits.c. This manipulation causes heap-based overflow. This vulnerability appears as CVE-2020-21830. There is no available exploit.

Detailsinfo

A vulnerability was found in GNU LibreDWG 0.10 (Image Processing Software). It has been declared as critical. Affected by this vulnerability is the function bit_calc_CRC of the file bits.c. The manipulation with an unknown input leads to a heap-based overflow vulnerability. The CWE definition for the vulnerability is CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). As an impact it is known to affect confidentiality, integrity, and availability.

The weakness was presented 05/18/2021. The advisory is shared at github.com. This vulnerability is known as CVE-2020-21830. Technical details are known, but no exploit is available.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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Version

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.1
VulDB Meta Temp Score: 7.1

VulDB Base Score: 5.5
VulDB Temp Score: 5.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.8
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Heap-based overflow
CWE: CWE-122 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

08/13/2020 🔍
05/18/2021 +278 days 🔍
05/18/2021 +0 days 🔍
07/05/2026 +1874 days 🔍

Sourcesinfo

Vendor: gnu.org

Advisory: github.com
Status: Confirmed

CVE: CVE-2020-21830 (🔍)
GCVE (CVE): GCVE-0-2020-21830
GCVE (VulDB): GCVE-100-175273

Entryinfo

Created: 05/18/2021 08:11
Updated: 07/05/2026 11:57
Changes: 05/18/2021 08:11 (38), 05/22/2021 07:34 (2), 07/05/2026 11:57 (33)
Complete: 🔍
Cache ID: 216::103

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