CVE-2026-63578

01/תיאור (מקור, אנגלית)

Allocation of resources without limits in password-based private-key decryption (PbeUtilities.GenerateCipherParameters) in Legion of the Bouncy Castle Inc. bc-csharp before 2.7.0 allows an attacker who can supply an encrypted private key, such as a PKCS#8 EncryptedPrivateKeyInfo or "ENCRYPTED PRIVATE KEY" PEM file, to cause a denial of service through CPU exhaustion via an iteration count close to 2^31, because the count is taken from the unauthenticated algorithm parameters without an upper bound and the key derivation runs before the password or the data can be checked. PKCS#5 PBES1 and PBES2 (PBKDF2), the PKCS#12 PBE algorithms and CMS password recipients (CmsPbeKey) are affected. Loading PKCS#12 files with Pkcs12Store is covered by CVE-2026-63572, and a zero or negative count with the PKCS#12 algorithms by CVE-2026-63575.

02/מוצרים מושפעים

bouncycastle: bc-csharp

03/קישורים6

• github.com/bcgit/bc-csharp/wiki/CVE-2026-63578 PatchVendor Advisory
• github.com/bcgit/bc-csharp/commit/34a7c05f719c91c024f285c6b420‮… Patch
• github.com/bcgit/bc-csharp/commit/54ea0b179ee627027829b44c45d6‮… Patch
• github.com/bcgit/bc-csharp/commit/7c0ed15f9783c9595b1a53f39001‮… Patch
• github.com/bcgit/bc-csharp/commit/b57165ecb7790ecea08273b219d5‮… Patch
• github.com/bcgit/bc-csharp/commit/c00fc018fca89c077c64dd2a2a2e‮… Patch