VirusTotal Yara 4.3.2 exe.c yr_execute_cod buffer overflow

Summaryinfo

A vulnerability categorized as critical has been discovered in VirusTotal Yara 4.3.2. Impacted is the function yr_execute_cod of the file exe.c. Such manipulation leads to buffer overflow. This vulnerability is uniquely identified as CVE-2023-40857. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability, which was classified as critical, has been found in VirusTotal Yara 4.3.2 (Anti-Malware Software). Affected by this issue is the function yr_execute_cod of the file exe.c. The manipulation with an unknown input leads to a buffer overflow vulnerability. Using CWE to declare the problem leads to CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Buffer Overflow vulnerability in VirusTotal yara v.4.3.2 allows a remote attacker to execute arbtirary code via the yr_execute_cod function in the exe.c component.

The weakness was disclosed 08/29/2023 as 1945. The advisory is shared for download at github.com. This vulnerability is handled as CVE-2023-40857 since 08/22/2023. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 01/29/2026).

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 vulnerability database at EUVD (EUVD-2023-45397). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

• Anti-Malware Software

Vendor

• VirusTotal

Name

• Yara

Version

• 4.3.2

Website

• Product: https://github.com/VirusTotal/yara/

CPE 2.3info

• 🔍

CPE 2.2info

• 🔍

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

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

Discussion