COMMON ATTACK PATTERN ENUMERATION AND CLASSIFICATIONMITRE canlı kaydı
CAPEC-12
Choosing Message Identifier
This pattern of attack is defined by the selection of messages distributed via multicast or public information channels that are intended for another client by determining the parameter value assigned to that client. This attack allows the adversary to gain access to potentially privileged information, and to possibly perpetrate other attacks through the distribution means by impersonation. If the channel/message being manipulated is an input rather than output mechanism for the system, (such as a command bus), this style of attack could be used to change the adversary's identifier to more a privileged one.
Soyutlama
Standard
Tipik ciddiyet
High
Saldırı ihtimali
High
Saldırıyı anla
Bu saldırı kalıbı nedir?
This pattern of attack is defined by the selection of messages distributed via multicast or public information channels that are intended for another client by determining the parameter value assigned to that client. This attack allows the adversary to gain access to potentially privileged information, and to possibly perpetrate other attacks through the distribution means by impersonation. If the channel/message being manipulated is an input rather than output mechanism for the system, (such as a command bus), this style of attack could be used to change the adversary's identifier to more a privileged one.
Uygulama akışı
Saldırı adım adım nasıl ilerler?
Explore
Determine Nature of Messages
Determine the nature of messages being transported as well as the identifiers to be used as part of the attack
Experiment
Authenticate
If required, authenticate to the distribution channel
Identify Known Client Identifiers
If any particular client's information is available through a control channel available to all users, the adversary will discover particular identifiers for targeted clients by observing this channel, or requesting client information through this channel.
Change Message Identifier
Adversaries with client access connecting to output channels could change their channel identifier and see someone else's (perhaps more privileged) data.
Gereksinimler
Saldırının gerçekleşmesi için ne gerekir?
Ön koşullar
- Information and client-sensitive (and client-specific) data must be present through a distribution channel available to all users.
- Distribution means must code (through channel, message identifiers, or convention) message destination in a manner visible within the distribution means itself (such as a control channel) or in the messages themselves.
Gerekli beceri
- Low: All the adversary needs to discover is the format of the messages on the channel/distribution means and the particular identifier used within the messages.
Gerekli kaynak
- The adversary needs the ability to control source code or application configuration responsible for selecting which message/channel id is absorbed from the public distribution means.
Etki
Başarılı saldırı neye yol açar?
Read Data
Etkilenen alanlar: Confidentiality
Gain Privileges
Etkilenen alanlar: Confidentiality, Access Control, Authorization
Savunma
Nasıl önlenir ve etkisi azaltılır?
1
Associate some ACL (in the form of a token) with an authenticated user which they provide middleware. The middleware uses this token as part of its channel/message selection for that client, or part of a discerning authorization decision for privileged channels/messages.
The purpose is to architect the system in a way that associates proper authentication/authorization with each channel/message.
2
Re-architect system input/output channels as appropriate to distribute self-protecting data. That is, encrypt (or otherwise protect) channels/messages so that only authorized readers can see them.
Gerçek dünya
MITRE örnek olayları
Örnek olay 1Detay
A certain B2B interface on a large application codes for messages passed over an MQSeries queue, on a single "Partners" channel. Messages on that channel code for their client destination based on a partner_ID field, held by each message. That field is a simple integer. Adversaries having access to that channel, perhaps a particularly nosey partner, can simply choose to store messages of another partner's ID and read them as they desire. Note that authentication does not prevent a partner from leveraging this attack on other partners. It simply disallows adversaries without partner status from conducting this attack.