VDB-129164 · CVE-2019-6291 · GCVE-0-2019-6291

Netwide Assembler up to 2.14.02 eval.c expr6 resource consumption

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 (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.4	$0-$5k	0.00

Summaryinfo

A vulnerability classified as problematic was found in Netwide Assembler up to 2.14.02. This affects the function expr6 of the file eval.c. Such manipulation leads to resource consumption. This vulnerability is traded as CVE-2019-6291. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in Netwide Assembler up to 2.14.02 (Programming Tool Software) and classified as problematic. Affected by this issue is the function expr6 of the file eval.c. The manipulation with an unknown input leads to a resource consumption vulnerability. Using CWE to declare the problem leads to CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. Impacted is availability. CVE summarizes:

An issue was discovered in the function expr6 in eval.c in Netwide Assembler (NASM) through 2.14.02. There is a stack exhaustion problem caused by the expr6 function making recursive calls to itself in certain scenarios involving lots of '!' or '+' or '-' characters. Remote attackers could leverage this vulnerability to cause a denial-of-service via a crafted asm file.

The bug was discovered 01/03/2019. The weakness was shared 01/15/2019 (Website). The advisory is shared for download at bugzilla.nasm.us. This vulnerability is handled as CVE-2019-6291 since 01/14/2019. The attack may be launched remotely. No form of authentication is required for exploitation. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1499.

The vulnerability was handled as a non-public zero-day exploit for at least 11 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 entry VDB-129163 is related to this item. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Programming Tool Software

Name

Netwide Assembler

Version

2.14.02

License

open-source

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.4

VulDB Base Score: 5.3
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Resource consumption
CWE: CWE-400 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

01/03/2019 🔍
01/14/2019 +11 days 🔍
01/14/2019 +0 days 🔍
01/15/2019 +1 days 🔍
01/15/2019 +0 days 🔍
04/29/2020 +470 days 🔍

Sourcesinfo

Advisory: bugzilla.nasm.us
Status: Not defined

CVE: CVE-2019-6291 (🔍)
GCVE (CVE): GCVE-0-2019-6291
GCVE (VulDB): GCVE-100-129164
See also: 🔍

Entryinfo

Created: 01/15/2019 10:28
Updated: 04/29/2020 14:57
Changes: 01/15/2019 10:28 (58), 04/29/2020 14:57 (1)
Complete: 🔍
Cache ID: 216::103