CVE-2023-40577

Public on

Last Modified: UTC

Description

Prometheus Alertmanager is vulnerable to cross-site scripting due to improper validation of user-supplied input by the /api/v1/alerts endpoint. This issue could allow a remote attacker to inject malicious script into a web page, which would be executed in a victim's web browser within the hosting website once the page is viewed, allow the attacker to steal the victim's cookie-based authentication credentials.

Prometheus Alertmanager is vulnerable to cross-site scripting due to improper validation of user-supplied input by the /api/v1/alerts endpoint. This issue could allow a remote attacker to inject malicious script into a web page, which would be executed in a victim's web browser within the hosting website once the page is viewed, allow the attacker to steal the victim's cookie-based authentication credentials.

Statement

This vulnerability affects Prometheus Alertmanager v0.25.0, which is not shipped in Red Hat OpenShift container platform, therefore, this is marked as Not affected.

This vulnerability affects Prometheus Alertmanager v0.25.0, which is not shipped in Red Hat OpenShift container platform, therefore, this is marked as Not affected.

Mitigation

Users can setup a reverse proxy in front of the Alertmanager web server to forbid access to the /api/v1/alerts endpoint.

Additional information

  • Bugzilla 2235479: prometheus-alertmanager: UI is vulnerable to stored XSS via the /api/v1/alerts endpoint
  • CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
  • FAQ: Frequently asked questions about CVE-2023-40577

Common Vulnerability Scoring System (CVSS) Score Details

Important note

CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).

CVSS v3 Score Breakdown
Red HatNVD

CVSS v3 Base Score

7.5

5.4

Attack Vector

Network

Network

Attack Complexity

Low

Low

Privileges Required

None

Low

User Interaction

None

Required

Scope

Unchanged

Changed

Confidentiality Impact

High

Low

Integrity Impact

None

Low

Availability Impact

None

None

CVSS v3 Vector

Red Hat: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

NVD: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Frequently Asked Questions

Why is Red Hat's CVSS v3 score or Impact different from other vendors?

My product is listed as "Under investigation" or "Affected", when will Red Hat release a fix for this vulnerability?

What can I do if my product is listed as "Will not fix"?

What can I do if my product is listed as "Fix deferred"?

What is a mitigation?

I have a Red Hat product but it is not in the above list, is it affected?

Why is my security scanner reporting my product as vulnerable to this vulnerability even though my product version is fixed or not affected?

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