Nginx njs njs/njs_vm.c njs_object_property buffer overflow

CVSS Meta Temp Score
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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.
8.0$0-$5k0.00

Summaryinfo

A vulnerability labeled as critical has been found in Nginx njs. This affects an unknown function of the file njs/njs_vm.c. The manipulation of the argument njs_object_property results in buffer overflow. This vulnerability is reported as CVE-2020-19695. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability classified as critical has been found in Nginx njs (Web Server) (the affected version unknown). Affected is an unknown part of the file njs/njs_vm.c. The manipulation of the argument njs_object_property with an unknown input leads to a buffer overflow vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

Buffer Overflow found in Nginx NJS allows a remote attacker to execute arbitrary code via the njs_object_property parameter of the njs/njs_vm.c function.

The weakness was disclosed 04/04/2023 as 188. The advisory is shared for download at github.com. This vulnerability is traded as CVE-2020-19695 since 08/13/2020. 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 04/22/2023).

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

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.0
VulDB Meta Temp Score: 8.0

VulDB Base Score: 6.3
VulDB Temp Score: 6.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

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

Exploitinginfo

Class: Buffer overflow
CWE: CWE-120 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
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

08/13/2020 🔍
04/04/2023 +964 days 🔍
04/04/2023 +0 days 🔍
04/22/2023 +18 days 🔍

Sourcesinfo

Product: github.com

Advisory: 188
Status: Confirmed

CVE: CVE-2020-19695 (🔍)
GCVE (CVE): GCVE-0-2020-19695
GCVE (VulDB): GCVE-100-224892

Entryinfo

Created: 04/04/2023 18:18
Updated: 04/22/2023 08:37
Changes: 04/04/2023 18:18 (40), 04/22/2023 08:37 (11)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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