漏洞信息
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Vulnerability Title
Unbounded EIP-7702 authorization list in mpp Tempo fee-payer sponsorship inflates gas cost and sponsors account delegation
Vulnerability Description
Improper Validation of Specified Quantity in Input in ZenHive mpp allows an unauthenticated remote client to inflate the fee-payer's gas cost per sponsored payment by a large multiplier and to have the sponsor pay for EIP-7702 account delegations of the client's choosing.
When the server sponsors Tempo payments, MPP.Methods.Tempo.FeePayerPolicy.measure/3 in lib/mpp/methods/tempo/fee_payer_policy.ex bounds the gas fields, the fee budget, the validity window and the access list of the client-signed 0x76 envelope, but never reads its aa_authorization_list field. Every signed delegation in that list is charged as intrinsic gas before the payment call runs, so a client attaching delegations from throwaway authority keys makes the sponsor pay for them within the default gas_limit ceiling. At the reporter's default of seven entries the sponsored cost rises from about 46,575 gas to about 1,884,087 gas. Because each entry is applied as a persistent set-code delegation, a client can also upgrade its own accounts to delegated code at the sponsor's expense.
This issue affects mpp: from 0.2.0 before 0.16.1.
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N
Vulnerability Type
CWE-1284
Vulnerability Title
ZenHive MPP 输入验证错误漏洞
Vulnerability Description
ZenHive MPP是ZenHive组织开源的一款嵌入式服务器。 ZenHive MPP 0.2.0版本至0.16.1之前版本存在输入验证错误漏洞,该漏洞源于对输入中指定数量的验证不当,未读取aa_authorization_list字段,可能导致未经身份验证的远程客户端通过附加EIP-7702账户委托,大幅增加费用支付者的gas成本,并让赞助商为其付费,甚至升级自身账户到委托代码。
CVSS Information
N/A
Vulnerability Type
N/A