BusyBox 1.36.1 xfuncs_printf.c xasprintf use after free

CVSS Meta Temp Score
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CTI Interest Score
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5.5$0-$5k0.00

Summaryinfo

A vulnerability identified as critical has been detected in BusyBox 1.36.1. The affected element is the function xasprintf of the file xfuncs_printf.c. This manipulation causes use after free. This vulnerability is handled as CVE-2023-42363. There is not any exploit available.

Detailsinfo

A vulnerability classified as critical was found in BusyBox 1.36.1. Affected by this vulnerability is the function xasprintf of the file xfuncs_printf.c. 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 summary by CVE is:

A use-after-free vulnerability was discovered in xasprintf function in xfuncs_printf.c:344 in BusyBox v.1.36.1.

The weakness was released 11/28/2023. The advisory is shared at bugs.busybox.net. This vulnerability is known as CVE-2023-42363 since 09/08/2023. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 215347 (Azure Linux 3.0 Security Update: busybox (CVE-2023-42363)), 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 (215347) and EUVD (EUVD-2023-46816). 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: 5.5
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

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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: 🔍

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Nessus ID: 215347
Nessus Name: Azure Linux 3.0 Security Update: busybox (CVE-2023-42363)

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-2023-42363 (🔍)
GCVE (CVE): GCVE-0-2023-42363
GCVE (VulDB): GCVE-100-246241
EUVD: 🔍

Entryinfo

Created: 11/28/2023 08:07
Updated: 02/02/2026 08:46
Changes: 11/28/2023 08:07 (37), 12/17/2023 11:33 (9), 02/11/2025 04:11 (17), 02/02/2026 08:46 (1)
Complete: 🔍
Cache ID: 216::103

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

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