BusyBox up to 1.33.2 awk Applet getvar_s 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 was found in BusyBox. It has been declared as problematic. Affected is the function getvar_s of the component awk Applet. Executing a manipulation can lead to use after free. The identification of this vulnerability is CVE-2021-42382. The attack may be launched remotely. There is no exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic was found in BusyBox. This vulnerability affects the function getvar_s 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 shared 11/17/2021. The advisory is shared for download at jfrog.com. This vulnerability was named CVE-2021-42382 since 10/14/2021. There are known technical details, 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). Once again VulDB remains the best source for 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

AVACAuCIA
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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-2021-42382 (🔍)
GCVE (CVE): GCVE-0-2021-42382
GCVE (VulDB): GCVE-100-186724

Entryinfo

Created: 11/17/2021 16:59
Updated: 04/24/2025 02:25
Changes: 11/17/2021 16:59 (54), 11/19/2021 12:10 (1), 11/19/2021 12:17 (1), 01/19/2025 15:57 (17), 04/24/2025 02:25 (1)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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