Moderate Vulnerability in OpenSSL: Out-of-Bounds Read & Write in RFC 3211 KEK Unwrap
Summary
ALSA-2025:21248: Moderate: openssl security update. Affects openssl versions < 1:3.5.1-4.el10_1.alma.1. Fixed in 1:3.5.1-4.el10_1.alma.1. How to fix ↓
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Background
OpenSSL is a widely-used toolkit that implements the Secure Sockets Layer (SSL) and Transport Layer Security (TLS) protocols, along with a comprehensive general-purpose cryptography library. It is essential for securing communications over computer networks. The OpenSSL packages affected by this vulnerability include openssl, openssl-devel, openssl-libs, and openssl-perl, all of which are crucial for developers and system administrators who rely on secure data transmission.
Vulnerability Detail
The vulnerability identified as CVE-2025-9230 involves an out-of-bounds read and write in the RFC 3211 KEK Unwrap function of OpenSSL. This flaw can potentially allow an attacker to exploit the affected software, leading to unauthorized access or manipulation of sensitive data. The issue arises from improper handling of input data, which can result in memory corruption and unpredictable behavior of the application.
How To Fix
Minimum fixed version
1:3.5.1-4.el10_1.alma.1
This is the first release that contains the fix.
sudo dnf update opensslTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
Currently, there are no specific workarounds available for this vulnerability. The best course of action is to apply the security update as soon as it is feasible.
Conclusion
The OpenSSL vulnerability CVE-2025-9230 poses a moderate risk due to its potential for memory corruption and unauthorized data access. It is crucial for users to update their OpenSSL packages to the patched version to mitigate this risk. Regular monitoring and updates are essential for maintaining the security of applications that depend on OpenSSL.
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FAQ
CVE-2025-9230 is a vulnerability in OpenSSL that involves an out-of-bounds read and write in the RFC 3211 KEK Unwrap function, which can lead to memory corruption.
You can use Vulert, which monitors and alerts for open-source vulnerabilities in your software. You can check your application against this vulnerability using the Vulert playground at Vulert Scanner without any signup.
The vulnerability can lead to unauthorized access or manipulation of sensitive data, potentially compromising the security of applications that rely on OpenSSL.
It is not safe to continue using the affected packages without applying the security update, as this could expose your application to attacks.
If you cannot update the packages immediately, ensure that your application is not exposed to untrusted networks or users until the update can be applied.
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