CVE-2025-34092

July 3, 2025, 3:13 p.m.

9.3
Critical

Description

A cookie encryption bypass vulnerability exists in Google Chrome’s AppBound mechanism due to weak path validation logic within the elevation service. When Chrome encrypts a cookie key, it records its own executable path as validation metadata. Later, when decrypting, the elevation service compares the requesting process’s path to this stored path. However, due to path canonicalization inconsistencies, an attacker can impersonate Chrome (e.g., by naming their binary chrome.exe and placing it in a similar path) and successfully retrieve the encrypted cookie key. This allows malicious processes to retrieve cookies intended to be restricted to the Chrome process only. Confirmed in Google Chrome with AppBound Encryption enabled. Other Chromium-based browsers may be affected if they implement similar COM-based encryption mechanisms.

Product(s) Impacted

Vendor Product Versions
Google
  • Chrome
  • *

Weaknesses

Common security weaknesses mapped to this vulnerability.

CWE-287
Improper Authentication
When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.

*CPE(s)

Affected systems and software identified for this CVE.

Type Vendor Product Version Update Edition Language Software Edition Target Software Target Hardware Other Information
a google chrome / / / / / / / /

References

https://vulncheck.com/advisories/google-chrome-appbound-cookie-encryption
https://www.cyberark.com/resources/threat-research-blog/c4-bomb-blowing-up-chromes-appbound-cookie-encryption

Tags

CWE-287
disclosure@vulncheck.com
2025-07-02
CVE-2025-34092

CVSS Score

9.3 / 10

CVSS Data - 4.0

  • Attack Vector: LOCAL
  • Attack Complexity: LOW
  • Attack Requirements: NONE
  • Privileges Required: LOW
  • User Interaction: NONE
  • Scope:
  • Confidentiality Impact: HIGH
  • Integrity Impact: HIGH
  • Availability Impact: HIGH
  • Exploit Maturity: NOT_DEFINED

    • CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

    View Vector String

Timeline

Published: July 2, 2025, 8:15 p.m.
Last Modified: July 3, 2025, 3:13 p.m.

Status : Awaiting Analysis

CVE has been recently published to the CVE List and has been received by the NVD.

More info

Source

disclosure@vulncheck.com

*Disclaimer: Some vulnerabilities do not have an associated CPE. To enhance the data, we use AI to infer CPEs based on CVE details. This is an automated process and might not always be accurate.