Lua 5.4.2/5.4.4 ldebug.c funcnamefromcode denial of service

CVSS Meta Temp Score
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CTI Interest Score
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4.2$0-$5k0.00

Summaryinfo

A vulnerability was found in Lua 5.4.2/5.4.4. It has been rated as problematic. Affected by this issue is the function funcnamefromcode of the file ldebug.c. This manipulation causes denial of service. This vulnerability is registered as CVE-2021-44647. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability was found in Lua 5.4.2/5.4.4. It has been declared as problematic. Affected by this vulnerability is the function funcnamefromcode of the file ldebug.c. The manipulation with an unknown input leads to a denial of service vulnerability. The CWE definition for the vulnerability is CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. As an impact it is known to affect availability.

The weakness was published 01/11/2022. It is possible to read the advisory at lua-users.org. This vulnerability is known as CVE-2021-44647 since 12/06/2021. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 216573 (Azure Linux 3.0 Security Update: lua / ntopng (CVE-2021-44647)), which helps to determine the existence of the flaw in a target environment.

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

The vulnerability is also documented in the vulnerability database at Tenable (216573). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.2

VulDB Base Score: 4.3
VulDB Temp Score: 4.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

Exploitinginfo

Class: Denial of service
CWE: CWE-404
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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Nessus ID: 216573
Nessus Name: Azure Linux 3.0 Security Update: lua / ntopng (CVE-2021-44647)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

12/06/2021 🔍
01/11/2022 +36 days 🔍
01/11/2022 +0 days 🔍
02/21/2025 +1137 days 🔍

Sourcesinfo

Advisory: lua-users.org
Status: Not defined

CVE: CVE-2021-44647 (🔍)
GCVE (CVE): GCVE-0-2021-44647
GCVE (VulDB): GCVE-100-190015

Entryinfo

Created: 01/11/2022 17:15
Updated: 02/21/2025 11:35
Changes: 01/11/2022 17:15 (18), 01/11/2022 17:16 (19), 01/13/2022 14:34 (1), 02/21/2025 11:35 (16)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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