YARA 3.8.1 Object Lookup Negative Value input validation

CVSS Meta Temp Score
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CTI Interest Score
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5.1$0-$5k0.00

Summaryinfo

A vulnerability categorized as problematic has been discovered in YARA 3.8.1. The affected element is an unknown function of the component Object Lookup. Such manipulation as part of Negative Value leads to input validation. This vulnerability is uniquely identified as CVE-2019-5020. Local access is required to approach this attack. No exploit exists.

Detailsinfo

A vulnerability was found in YARA 3.8.1. It has been rated as problematic. Affected by this issue is an unknown functionality of the component Object Lookup. The manipulation as part of a Negative Value leads to a input validation vulnerability. Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Impacted is availability. CVE summarizes:

An exploitable denial of service vulnerability exists in the object lookup functionality of Yara 3.8.1. A specially crafted binary file can cause a negative value to be read to satisfy an assert, resulting in Denial of Service. An attacker can create a malicious binary to trigger this vulnerability.

The weakness was disclosed 07/31/2019. This vulnerability is handled as CVE-2019-5020 since 01/04/2019. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.1
VulDB Meta Temp Score: 5.1

VulDB Base Score: 3.3
VulDB Temp Score: 3.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CNA Base Score: 6.5
CNA Vector (Talos): 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

01/04/2019 🔍
07/31/2019 +208 days 🔍
08/01/2019 +1 days 🔍
11/14/2023 +1566 days 🔍

Sourcesinfo

Advisory: talosintelligence.com
Status: Not defined

CVE: CVE-2019-5020 (🔍)
GCVE (CVE): GCVE-0-2019-5020
GCVE (VulDB): GCVE-100-139112

Entryinfo

Created: 08/01/2019 10:37
Updated: 11/14/2023 19:01
Changes: 08/01/2019 10:37 (35), 07/17/2020 11:46 (17), 11/14/2023 18:54 (3), 11/14/2023 19:01 (12)
Complete: 🔍
Cache ID: 216::103

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