Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2025-14813— GOSTCTR implementation unable to process more than 255 blocks correctly

Quick assessment

Affected
Legion of the Bouncy Castle Inc. BC-JAVA
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Bouncy Castle Java是Legion of the Bouncy Castle Inc开源的一个加密算法程序。 Bouncy Castle Java 1.84之前版本存在安全漏洞，该漏洞源于使用了有缺陷或不安全的加密算法，可能导致GOSTCTR实现无法正确处理超过255个数据块。

CVSS 9.3 · Critical EPSS 0.32% · P23

Possible ATT&CK Techniques 1 AI

T1557 · Adversary-in-the-Middle

Affected Version Matrix 3

VendorProduct Version RangeStatus
Legion of the Bouncy Castle Inc. BC-JAVA 1.59< 1.80.2 affected
1.81< 1.81.1 affected
1.82< 1.84 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2025-14813

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
GOSTCTR implementation unable to process more than 255 blocks correctly
Source: CVE Program / CVE List V5
Vulnerability Description
: Use of a Broken or Risky Cryptographic Algorithm vulnerability in Legion of the Bouncy Castle Inc. BC-JAVA bcprov on all (core modules). This vulnerability is associated with program files G3413CTRBlockCipher. This issue affects BC-JAVA: from 1.59 before 1.80.2, from 1.81 before 1.81.1, from 1.82 before 1.84.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N/RE:M/U:Red
Source: CVE Program / CVE List V5
Vulnerability Type
使用已被攻破或存在风险的密码学算法
Source: CVE Program / CVE List V5
Vulnerability Title
Bouncy Castle Java 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Bouncy Castle Java是Legion of the Bouncy Castle Inc开源的一个加密算法程序。 Bouncy Castle Java 1.84之前版本存在安全漏洞，该漏洞源于使用了有缺陷或不安全的加密算法，可能导致GOSTCTR实现无法正确处理超过255个数据块。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Legion of the Bouncy Castle Inc. BC-JAVA 1.59 ~ 1.80.2 -

II. Public POCs for CVE-2025-14813

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2025-14813

请登录查看更多情报信息。

Patches & Fixes for CVE-2025-14813 (1)

Same Patch Batch · Legion of the Bouncy Castle Inc. · 2026-04-15 · 5 CVEs total

CVE-2026-5598 8.9 HIGH Non-constant time comparisons risk private key leakage in FrodoKEM.
CVE-2026-3505 8.7 HIGH Unbounded PGP AEAD chunk size leads to pre-auth resource exhaustion.
CVE-2026-5588 6.3 MEDIUM PKIX draft CompositeVerifier accepts empty signature sequence as valid.
CVE-2026-0636 5.5 MEDIUM LDAP Injection Vulnerability in LDAPStoreHelper.java

IV. Related Vulnerabilities

Same product: BC-JAVA
Same vendor: Legion of the Bouncy Castle Inc.
Same weakness: CWE-327

V. Comments for CVE-2025-14813

No comments yet

Leave a comment