CWE-837: Improper Enforcement of a Single, Unique Action
CWE版本: 4.18
更新日期: 2025-09-09
弱点描述
The product requires that an actor should only be able to perform an action once, or to have only one unique action, but the product does not enforce or improperly enforces this restriction.
扩展描述
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 product.
常见后果
影响范围: Other
技术影响: Varies by Context
说明: An attacker might be able to gain advantage over other users by performing the action multiple times, or affect the correctness of the product.
观察示例
参考: CVE-2008-0294
Ticket-booking web application allows a user to lock a seat more than once.
参考: CVE-2005-4051
CMS allows people to rate downloads by voting more than once.
参考: CVE-2002-216
Polling software allows people to vote more than once by setting a cookie.
参考: 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.
参考: 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.
参考: CVE-2009-2346
Protocol implementation allows remote attackers to cause a denial of service (call-number exhaustion) by initiating many message exchanges.