Dell BIOS null byte or nul character

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.
2.5$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in Dell BIOS. This affects an unknown function. Performing a manipulation results in improper neutralization of null byte or nul character. This vulnerability is cataloged as CVE-2022-31223. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability classified as problematic has been found in Dell BIOS (the affected version is unknown). This affects an unknown code. The manipulation with an unknown input leads to a improper neutralization of null byte or nul character vulnerability. CWE is classifying the issue as CWE-158. The product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes NUL characters or null bytes when they are sent to a downstream component. This is going to have an impact on confidentiality. The summary by CVE is:

Dell BIOS versions contain an Improper Neutralization of Null Byte vulnerability. A local authenticated administrator user could potentially exploit this vulnerability by sending unexpected null bytes in order to read memory on the system.

The weakness was shared 09/13/2022. It is possible to read the advisory at dell.com. This vulnerability is uniquely identified as CVE-2022-31223 since 05/19/2022. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/15/2022).

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

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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Vendor

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License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 2.5
VulDB Meta Temp Score: 2.5

VulDB Base Score: 2.7
VulDB Temp Score: 2.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 2.3
CNA Vector (Dell): 🔍

CVSSv2info

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

Exploitinginfo

Class: Improper neutralization of null byte or nul character
CWE: CWE-158 / 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

05/19/2022 🔍
09/13/2022 +117 days 🔍
09/13/2022 +0 days 🔍
10/15/2022 +32 days 🔍

Sourcesinfo

Vendor: dell.com

Advisory: dell.com
Status: Confirmed

CVE: CVE-2022-31223 (🔍)
GCVE (CVE): GCVE-0-2022-31223
GCVE (VulDB): GCVE-100-208359

Entryinfo

Created: 09/13/2022 10:37
Updated: 10/15/2022 14:52
Changes: 09/13/2022 10:37 (35), 10/15/2022 14:52 (12)
Complete: 🔍
Cache ID: 216::103

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