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CVE-2025-69418 medium CVSS 4.0

Vulnerability in Openssl (CVE-2025-69418)

Summary

Vulnerability in Openssl (CVE-2025-69418). Risk of unauthorized operations or information disclosure.

Original description

The description as published by the source.

Issue summary: When using the low-level OCB API directly with AES-NI orother hardware-accelerated code paths, inputs whose length is not a multipleof 16 bytes can leave the final partial block unencrypted and unauthenticated.Impact summary: The trailing 1-15 bytes of a message may be exposed incleartext on encryption and are not covered by the authentication tag,allowing an attacker to read or tamper with those bytes without detection.The low-level OCB encrypt and decrypt routines in the hardware-acceleratedstream path process full 16-byte blocks but do not advance the input/outputpointers. The subsequent tail-handling code then operates on the originalbase pointers, effectively reprocessing the beginning of the buffer whileleaving the actual trailing bytes unprocessed. The authentication checksumalso excludes the true tail bytes.However, typical OpenSSL consumers using EVP are not affected because thehigher-level EVP and provider OCB implementations split inputs so that fullblocks and trailing partial blocks are processed in separate calls, avoidingthe problematic code path. Additionally, TLS does not use OCB ciphersuites.The vulnerability only affects applications that call the low-levelCRYPTO_ocb128_encrypt() or CRYPTO_ocb128_decrypt() functions directly withnon-block-aligned lengths in a single call on hardware-accelerated builds.For these reasons the issue was assessed as Low severity.The FIPS modules in 3.6, 3.5, 3.4, 3.3, 3.2, 3.1 and 3.0 are not affectedby this issue,…

Source: NIST National Vulnerability Database NVD GitHub Advisory

Auto-generated summary

Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.

A vulnerability tracked as CVE-2025-69418 has been found in Openssl.
Risk of unauthorized operations or information disclosure. CVSS score: 4.0/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "Openssl CVE-2025-69418" on the vendor's site.

CVE-2025-69418 (Openssl) — CWE-325 / CVSS v3 4.0
Attack vector: local / unauthenticated / no user interaction
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.

❓ What is the problem

A vulnerability (CWE-325) exists in Openssl.

📍 Affected scope

Check the vendor advisory for the affected versions of Openssl.

🔥 Severity

Severity: Medium (CVSS 4.0/10). Risk of unauthorized operations or information disclosure.

🔧 How to fix

Update to the patched release per vendor advisory.

🛡️ Workaround

Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.

🔍 Detection

Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'Openssl' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.

Response actions

Concrete steps and command examples for SOC/SRE teams to execute in order

  1. 1
    Identify exposure identify 
    grep -r 'Openssl' . | grep -v node_modules

    リポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で Openssl を grep し、稼働しているサービス・バージョンを把握する。

  2. 2
    Post-deployment verification verify 
    Confirm patched version is live in production

    パッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。

Fix status by distribution

Fixed packages published by each distribution for this CVE

References

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