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CWE
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Improper Enforcement of a Single, Unique Action

ID: 837Date: (C)2012-05-14   (M)2012-11-08
Type: weaknessStatus: INCOMPLETE
Abstraction Type: Base





Description

The software requires that an actor should only be able to perform an action once, or to have only one unique action, but the software does not enforce or improperly enforces this restriction.

Extended Description

In various applications, a user is only expected to perform a certain action once, such as voting, requesting a refund, or making a purchase. When this restriction is not enforced, sometimes this can have security implications. For example, in a voting application, an attacker could attempt to "stuff the ballot box" by voting multiple times. If these votes are counted separately, then the attacker could directly affect who wins the vote. This could have significant business impact depending on the purpose of the software.

Applicable Platforms
Language Class: Language-independent

Common Consequences

ScopeTechnical ImpactNotes
Other
 
 An attacker might be able to gain advantage over other users by performing the action multiple times, or affect the correctness of the software.
 

Detection Methods
None

Potential Mitigations
None

Relationships

Related CWETypeViewChain
CWE-837 ChildOf CWE-799 Weakness CWE-1000
CWE-699 
 

Demonstrative Examples
None

Observed Examples

  1. CVE-2008-0294 : Ticket-booking web application allows a user to lock a seat more than once.
  2. CVE-2005-4051 : CMS allows people to rate downloads by voting more than once.
  3. CVE-2002-216 : Polling software allows people to vote more than once by setting a cookie.
  4. CVE-2003-1433 : Chain: lack of validation of a challenge key in a game allows a player to register multiple times and lock other players out of the game.
  5. CVE-2002-1018 : Library feature allows attackers to check out the same e-book multiple times, preventing other users from accessing copies of the e-book.
  6. CVE-2009-2346 : Protocol implementation allows remote attackers to cause a denial of service (call-number exhaustion) by initiating many message exchanges.

For more examples, refer to CVE relations in the bottom box.

White Box Definitions
None

Black Box Definitions
None

Taxynomy Mappings
None

References:
None

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