YARA 3.8.1 libyara/exec.c Address information disclosure

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
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CTI Interest Score
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4.3$0-$5k0.00

Summaryinfo

A vulnerability was found in YARA 3.8.1. It has been declared as problematic. This affects an unknown part of the file libyara/exec.c. The manipulation results in information disclosure (Address). This vulnerability is cataloged as CVE-2018-19974. The attack must be initiated from a local position. There is no exploit available.

Detailsinfo

A vulnerability, which was classified as problematic, was found in YARA 3.8.1. Affected is some unknown processing of the file libyara/exec.c. The manipulation with an unknown input leads to a information disclosure vulnerability (Address). CWE is classifying the issue as CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. This is going to have an impact on confidentiality. CVE summarizes:

In YARA 3.8.1, bytecode in a specially crafted compiled rule can read uninitialized data from VM scratch memory in libyara/exec.c. This can allow attackers to discover addresses in the real stack (not the YARA virtual stack).

The bug was discovered 12/07/2018. The weakness was shared 12/17/2018 (GitHub Repository). The advisory is shared for download at github.com. This vulnerability is traded as CVE-2018-19974 since 12/08/2018. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1592.

The vulnerability was handled as a non-public zero-day exploit for at least 10 days. During that time the estimated underground price was around $0-$5k.

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

The entries VDB-128065 and VDB-128066 are related to this item. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.4
VulDB Meta Temp Score: 4.3

VulDB Base Score: 3.3
VulDB Temp Score: 3.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
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

Name: Address
Class: Information disclosure / Address
CWE: CWE-200 / CWE-284 / CWE-266
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

12/07/2018 🔍
12/08/2018 +1 days 🔍
12/17/2018 +9 days 🔍
12/17/2018 +0 days 🔍
12/18/2018 +1 days 🔍
06/19/2023 +1644 days 🔍

Sourcesinfo

Advisory: 999
Status: Not defined
Confirmation: 🔍

CVE: CVE-2018-19974 (🔍)
GCVE (CVE): GCVE-0-2018-19974
GCVE (VulDB): GCVE-100-128064
See also: 🔍

Entryinfo

Created: 12/18/2018 09:20
Updated: 06/19/2023 15:50
Changes: 12/18/2018 09:20 (61), 04/21/2020 16:29 (2), 06/19/2023 15:44 (4), 06/19/2023 15:50 (1)
Complete: 🔍
Cache ID: 216::103

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

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