Lua 5.4.3 Tail Call ldo.c luaD_pretailcall heap-based overflow

CVSS Meta Temp Score
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CTI Interest Score
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7.2$0-$5k0.00

Summaryinfo

A vulnerability labeled as critical has been found in Lua 5.4.3. This vulnerability affects the function luaD_pretailcall of the file ldo.c of the component Tail Call Handler. Executing a manipulation can lead to heap-based overflow. This vulnerability is tracked as CVE-2021-45985. The attack can be launched remotely. No exploit exists. It is best practice to apply a patch to resolve this issue.

Detailsinfo

A vulnerability has been found in Lua 5.4.3 and classified as critical. This vulnerability affects the function luaD_pretailcall of the file ldo.c of the component Tail Call Handler. 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. CVE summarizes:

In Lua 5.4.3, an erroneous finalizer called during a tail call leads to a heap-based buffer over-read.

The weakness was disclosed 04/10/2023 as cf613cdc6fa367257fc61c256f63d917350858b5. The advisory is available at github.com. This vulnerability was named CVE-2021-45985 since 01/03/2022. Technical details are known, but there is no available exploit.

Applying the patch cf613cdc6fa367257fc61c256f63d917350858b5 is able to eliminate this problem. The bugfix is ready for download at github.com.

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Productinfo

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Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.4
VulDB Meta Temp Score: 7.2

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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

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: Patch
Status: 🔍

0-Day Time: 🔍

Patch: cf613cdc6fa367257fc61c256f63d917350858b5

Timelineinfo

01/03/2022 🔍
04/10/2023 +461 days 🔍
04/10/2023 +0 days 🔍
04/26/2023 +16 days 🔍

Sourcesinfo

Product: github.com

Advisory: cf613cdc6fa367257fc61c256f63d917350858b5
Status: Confirmed

CVE: CVE-2021-45985 (🔍)
GCVE (CVE): GCVE-0-2021-45985
GCVE (VulDB): GCVE-100-225382

Entryinfo

Created: 04/10/2023 15:58
Updated: 04/26/2023 14:32
Changes: 04/10/2023 15:58 (43), 04/26/2023 14:32 (11)
Complete: 🔍
Cache ID: 216::103

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