VDB-246240 · CVE-2023-42365 · EUVD-2023-46818

BusyBox 1.36.1 awk.c copyvar use after free

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.5	$0-$5k	0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in BusyBox 1.36.1. Impacted is the function copyvar of the file awk.c. The manipulation results in use after free. This vulnerability is known as CVE-2023-42365. No exploit is available.

Detailsinfo

A vulnerability classified as critical has been found in BusyBox 1.36.1. Affected is the function copyvar of the file awk.c. The manipulation with an unknown input leads to a use after free vulnerability. CWE is classifying the issue as CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

A use-after-free vulnerability was discovered in BusyBox v.1.36.1 via a crafted awk pattern in the awk.c copyvar function.

The weakness was published 11/28/2023. The advisory is shared for download at bugs.busybox.net. This vulnerability is traded as CVE-2023-42365 since 09/08/2023. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 214044 (EulerOS 2.0 SP10 : busybox (EulerOS-SA-2025-1001)), 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 databases at Tenable (214044) and EUVD (EUVD-2023-46818). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Name

BusyBox

Version

1.36.1

License

open-source

CPE 2.3info

🔍

CPE 2.2info

🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.5

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

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 214044
Nessus Name: EulerOS 2.0 SP10 : busybox (EulerOS-SA-2025-1001)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

09/08/2023 🔍
11/28/2023 +81 days 🔍
11/28/2023 +0 days 🔍
02/02/2026 +797 days 🔍

Sourcesinfo

Advisory: bugs.busybox.net
Status: Confirmed

CVE: CVE-2023-42365 (🔍)
GCVE (CVE): GCVE-0-2023-42365
GCVE (VulDB): GCVE-100-246240
EUVD: 🔍

Entryinfo

Created: 11/28/2023 08:07
Updated: 02/02/2026 09:39
Changes: 11/28/2023 08:07 (37), 12/17/2023 11:26 (9), 01/14/2025 06:14 (17), 02/02/2026 09:39 (1)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.