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Access control issues in blackbox_exporter

High severity GitHub Reviewed Published Apr 26, 2023 to the GitHub Advisory Database • Updated Nov 7, 2023

Package

gomod github.com/prometheus/blackbox_exporter (Go)

Affected versions

<= 0.23.0

Patched versions

None

Description

blackbox_exporter v0.23.0 was discovered to contain an access control issue in its probe interface. This vulnerability allows attackers to detect intranet ports and services, as well as download resources.

References

Published by the National Vulnerability Database Apr 26, 2023
Published to the GitHub Advisory Database Apr 26, 2023
Reviewed Apr 26, 2023
Last updated Nov 7, 2023

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS score

0.220%
(60th percentile)

Weaknesses

CVE ID

CVE-2023-26735

GHSA ID

GHSA-939c-3g97-vpvv

Source code

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