Opera before 12.11 allows remote attackers to determine the existence of arbitrary local files via vectors involving web script in an error

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

• opera opera browserup to 12.10 inclusive
• opera opera browser1.00
• opera opera browser10.00
• opera opera browser10.01
• opera opera browser10.10
• opera opera browser10.11
• opera opera browser10.20
• opera opera browser10.50
• opera opera browser10.51
• opera opera browser10.52
• opera opera browser10.53
• opera opera browser10.54
• opera opera browser10.60
• opera opera browser10.61
• opera opera browser10.62
• opera opera browser10.63
• opera opera browser11.00
• opera opera browser11.01
• opera opera browser11.10
• opera opera browser11.11

Other highest-scoring records for the same primary product.

• CVE-2010-1349Integer overflow in Opera 10.10 through 10.50 allows remote attackers to execute arbitrary code via a large Content-Length value, which trig
  46Plan
• CVE-2011-2628Opera before 11.11 does not properly implement FRAMESET elements, which allows remote attackers to execute arbitrary code or cause a denial
  44Plan
• CVE-2012-3561Opera before 11.64 does not properly allocate memory for URL strings, which allows remote attackers to execute arbitrary code or cause a den
  42Plan
• CVE-2011-4684Opera before 11.60 does not properly handle certificate revocation, which has unspecified impact and remote attack vectors related to "corne
  42Plan
• CVE-2007-6521Unspecified vulnerability in Opera before 9.25 allows remote attackers to execute arbitrary code via crafted TLS certificates.
  42Plan
• CVE-2013-3211Unspecified vulnerability in Opera before 12.15 has unknown impact and attack vectors, related to a "moderately severe issue."
  41Plan

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Root cause

The extension requests broader permissions than its function needs and sends the data it collects out for purposes beyond its stated function.

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

1{2  "permissions": ["tabs", "<all_urls>"],3  "background": { "service_worker": "analytics.js" }4}

1{2  "permissions": ["activeTab"],3  "host_permissions": ["https://yildiz.example/*"]4}

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.