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Remote Code Execution Vulnerability in OpenSSL

Indian – Computer Emergency Response Team (https://www.cert-in.org.in)

Severity Rating: HIGH

Software Affected

OpenSSL versions 3.0 prior to 3.0.19

OpenSSL versions 3.3 prior to 3.3.6

OpenSSL versions 3.4 prior to 3.4.4

OpenSSL versions 3.5 prior to 3.5.5

OpenSSL versions 3.6 prior to 3.6.1

Overview

A vulnerability has been reported in OpenSSL , which could allow a remote attacker to cause denial of service or potentially execute arbitrary code on the targeted system.

Target Audience:

Individuals and organizations using operating applications or services that process untrusted CMS or PKCS#7 content using OpenSSL.

Risk Assessment:

High risk of denial of service and potential remote code execution due to a stack-based buffer overflow that can be triggered without authentication.

Impact Assessment:

Application or service crashes leading to denial of service, remote code execution, and compromise of systems.

Description

OpenSSL is a widely used cryptographic library providing TLS, SSL, and cryptographic functionality for applications and services.

The vulnerability exists in OpenSSL due to improper handling of CMS AuthEnvelopedData structures that use AEAD ciphers such as AES-GCM. During parsing, the Initialization Vector (IV) encoded in ASN.1 parameters is copied into a fixed-size stack buffer without validating its length.

Successful exploitation of this vulnerability may allow a remote attacker to cause denial of service or potentially execute arbitrary code on the targeted system.

Solution

Update OpenSSL to the latest patched version as provided by the vendor:

https://openssl-library.org/news/vulnerabilities/index.html

Vendor Information

Open SSL

https://openssl-library.org/news/vulnerabilities/index.html

References

 

https://openssl-library.org/news/vulnerabilities/index.html

CVE Name

CVE-2025-15467

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Thanks and Regards,

CERT-In

Incident Response Help Desk

e-mail: incident@cert-in.org.in

Phone: +91-11-22902657

Toll Free Number: 1800-11-4949

Toll Free Fax : 1800-11-6969

Web: http://www.cert-in.org.in

PGP Fingerprint: A768 083E 4475 5725 B81A A379 2156 C0C0 B620 D0B4

PGP Key information:

https://www.cert-in.org.in/s2cMainServlet?pageid=CONTACTUS

Postal address:

Indian Computer Emergency Response Team (CERT-In)

Ministry of Electronics and Information Technology

Government of India

Electronics Niketan

6, C.G.O. Complex

New Delhi-110 003

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