BusyBox up to 1.33.2 awk Applet next_input_file use after free

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.8$0-$5k0.00

Summaryinfo

A vulnerability has been found in BusyBox and classified as problematic. The impacted element is the function next_input_file of the component awk Applet. This manipulation causes use after free. This vulnerability is handled as CVE-2021-42379. The attack can be initiated remotely. There is not any exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in BusyBox. It has been declared as problematic. Affected by this vulnerability is the function next_input_file of the component awk Applet. The manipulation with an unknown input leads to a use after free vulnerability. The CWE definition for the vulnerability is CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. As an impact it is known to affect confidentiality, integrity, and availability.

The weakness was released 11/17/2021. The advisory is shared at jfrog.com. This vulnerability is known as CVE-2021-42379 since 10/14/2021. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 214387 (Debian dla-4019 : busybox - security update), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 1.34.0 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (214387). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.9
VulDB Meta Temp Score: 5.8

VulDB Base Score: 4.7
VulDB Temp Score: 4.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.2
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / 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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Nessus ID: 214387
Nessus Name: Debian dla-4019 : busybox - security update

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: BusyBox 1.34.0

Timelineinfo

10/14/2021 🔍
11/17/2021 +34 days 🔍
11/17/2021 +0 days 🔍
04/24/2025 +1254 days 🔍

Sourcesinfo

Advisory: jfrog.com
Status: Confirmed

CVE: CVE-2021-42379 (🔍)
GCVE (CVE): GCVE-0-2021-42379
GCVE (VulDB): GCVE-100-186721

Entryinfo

Created: 11/17/2021 16:56
Updated: 04/24/2025 02:25
Changes: 11/17/2021 16:56 (54), 11/19/2021 11:25 (1), 11/19/2021 11:32 (1), 01/19/2025 15:57 (17), 04/24/2025 02:25 (1)
Complete: 🔍
Cache ID: 216::103

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

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