rhboot shim 15.8 HTTP Boot Support origin validation

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.
8.1$0-$5k0.00

Summaryinfo

A vulnerability marked as critical has been reported in rhboot shim 15.8. Impacted is an unknown function of the component HTTP Boot Support. The manipulation leads to an unknown weakness. This vulnerability is uniquely identified as CVE-2023-40547. No exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in rhboot shim 15.8. It has been rated as critical. This issue affects an unknown code of the component HTTP Boot Support. Using CWE to declare the problem leads to CWE-346. The product does not properly verify that the source of data or communication is valid. Impacted is confidentiality, integrity, and availability.

The weakness was disclosed 01/24/2024. It is possible to read the advisory at bugzilla.redhat.com. The identification of this vulnerability is CVE-2023-40547 since 08/15/2023. The technical details are unknown and an exploit is not publicly available.

Upgrading to version 15.8-2 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2023-45118). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.2
VulDB Meta Temp Score: 8.1

VulDB Base Score: 8.0
VulDB Temp Score: 7.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.3
NVD Vector: 🔍

CNA Base Score: 8.3
CNA Vector (Red Hat, Inc.): 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Origin validation
CWE: CWE-346 / CWE-345
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: shim 15.8-2

Timelineinfo

08/15/2023 🔍
01/24/2024 +162 days 🔍
01/24/2024 +0 days 🔍
02/05/2026 +743 days 🔍

Sourcesinfo

Advisory: bugzilla.redhat.com
Status: Confirmed

CNA: Red Hat, Inc.
CVE: CVE-2023-40547 (🔍)

GCVE (CVE): GCVE-0-2023-40547
GCVE (VulDB): GCVE-100-251927
EUVD: 🔍

Entryinfo

Created: 01/24/2024 09:44
Updated: 02/05/2026 09:58
Changes: 01/24/2024 09:44 (35), 02/17/2024 17:57 (1), 02/17/2024 18:04 (13), 06/11/2024 05:50 (26), 10/01/2025 12:37 (2), 02/05/2026 09:55 (2), 02/05/2026 09:58 (6)
Complete: 🔍
Committer: lywand
Cache ID: 216::103

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

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Might our Artificial Intelligence support you?

Check our Alexa App!