Informations de base
An HTTP cookie is a small piece of data attributed to a specific website and stored on the user's computer by the user's web browser. This data can be leveraged for a variety of purposes including saving information entered into form fields, recording user activity, and for authentication purposes. Cookies used to save or record information generated by the user are accessed and modified by script code embedded in a web page. While cookies used for authentication are created by the website's server and sent to the user to be attached to future requests. These authentication cookies are often not meant to be accessed by the web page sent to the user, and are instead just supposed to be attached to future requests to verify authentication details.
Modes d'introduction
Implementation
Plateformes applicables
Langue
Class: Not Language-Specific (Undetermined)
Technologies
Class: Web Based (Undetermined)
Conséquences courantes
Portée |
Impact |
Probabilité |
Confidentiality | Read Application Data
Note: If the HttpOnly flag is not set, then sensitive information stored in the cookie may be exposed to unintended parties. | |
Integrity | Gain Privileges or Assume Identity
Note: If the cookie in question is an authentication cookie, then not setting the HttpOnly flag may allow an adversary to steal authentication data (e.g., a session ID) and assume the identity of the user. | |
Exemples observés
Références |
Description |
| Web application for a room automation system has client-side Javascript that sets a sensitive cookie without the HTTPOnly security attribute, allowing the cookie to be accessed. |
| CMS written in Python does not include the HTTPOnly flag in a Set-Cookie header, allowing remote attackers to obtain potentially sensitive information via script access to this cookie. |
| Appliance for managing encrypted communications does not use HttpOnly flag. |
Mesures d’atténuation potentielles
Phases : Implementation
Leverage the HttpOnly flag when setting a sensitive cookie in a response.
Méthodes de détection
Automated Static Analysis
Automated static analysis, commonly referred to as Static Application Security Testing (SAST), can find some instances of this weakness by analyzing source code (or binary/compiled code) without having to execute it. Typically, this is done by building a model of data flow and control flow, then searching for potentially-vulnerable patterns that connect "sources" (origins of input) with "sinks" (destinations where the data interacts with external components, a lower layer such as the OS, etc.)
Efficacité : High
Notes de cartographie des vulnérabilités
Justification : This CWE entry is at the Variant level of abstraction, which is a preferred level of abstraction for mapping to the root causes of vulnerabilities.
Commentaire : Carefully read both the name and description to ensure that this mapping is an appropriate fit. Do not try to 'force' a mapping to a lower-level Base/Variant simply to comply with this preferred level of abstraction.
Références
REF-2
HttpOnly
OWASP.
https://owasp.org/www-community/HttpOnly REF-3
Some Bad News and Some Good News
Michael Howard.
https://learn.microsoft.com/en-us/previous-versions/ms972826(v=msdn.10)?redirectedfrom=MSDN REF-4
C is for cookie, H is for hacker - understanding HTTP only and Secure cookies
Troy Hunt.
https://www.troyhunt.com/c-is-for-cookie-h-is-for-hacker/ REF-5
Mitigating Cross-site Scripting With HTTP-only Cookies
Microsoft.
https://learn.microsoft.com/en-us/previous-versions//ms533046(v=vs.85)?redirectedfrom=MSDN
Soumission
Nom |
Organisation |
Date |
Date de publication |
Version |
CWE Content Team |
MITRE |
2017-01-02 +00:00 |
2017-01-19 +00:00 |
2.10 |
Modifications
Nom |
Organisation |
Date |
Commentaire |
CWE Content Team |
MITRE |
2017-11-08 +00:00 |
updated Applicable_Platforms, References, Relationships |
CWE Content Team |
MITRE |
2020-02-24 +00:00 |
updated Applicable_Platforms, Relationships |
CWE Content Team |
MITRE |
2021-10-28 +00:00 |
updated Relationships |
CWE Content Team |
MITRE |
2023-01-31 +00:00 |
updated Description |
CWE Content Team |
MITRE |
2023-04-27 +00:00 |
updated Detection_Factors, References, Relationships, Time_of_Introduction |
CWE Content Team |
MITRE |
2023-06-29 +00:00 |
updated Mapping_Notes |
CWE Content Team |
MITRE |
2023-10-26 +00:00 |
updated Observed_Examples |