PT-2026-104106 · Bouncy Castle · Bc-Csharp
CVSS v4.0
8.7
عالية
| المتجه | AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Name of the Vulnerable Software and Affected Versions
bc-csharp versions prior to 2.7.0
Description
Resource allocation without limits or throttling in the CMP/CRMF password-based MAC verifier (PKMacBuilder) allows a remote unauthenticated attacker to cause a denial of service through CPU exhaustion. This occurs when a CMP message or CRMF certificate request contains a
PBMParameter with an excessively large iteration count. The issue exists because the PKMacBuilder only enforces an iteration-count ceiling when an explicit maximum is provided via the PKMacBuilder(IPKMacPrimitivesProvider, int) constructor. When other constructors are used, the ProtectedPkiMessage.Verify and CertificateRequestMessage.IsValidSigningKeyPop functions perform up to 2^31 hash iterations as requested by the sender before the MAC is verified.Recommendations
Update bc-csharp to version 2.7.0 or later.
استغلال
إصلاح
DoS
Allocation of Resources Without Limits
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المعرّفات ذات الصلة
المنتجات المتأثرة
Bc-Csharp