CVE-2025-9230: Out-of-bounds Read (CVSS 7.5)

Description

Issue summary: An application trying to decrypt CMS messages encrypted using password based encryption can trigger an out-of-bounds read and write. Impact summary: This out-of-bounds read may trigger a crash which leads to Denial of Service for an application. The out-of-bounds write can cause a memory corruption which can have various consequences including a Denial of Service or Execution of attacker-supplied code. Although the consequences of a successful exploit of this vulnerability could be severe, the probability that the attacker would be able to perform it is low. Besides, password based (PWRI) encryption support in CMS messages is very rarely used. For that reason the issue was assessed as Moderate severity according to our Security Policy. The FIPS modules in 3.5, 3.4, 3.3, 3.2, 3.1 and 3.0 are not affected by this issue, as the CMS implementation is outside the OpenSSL FIPS module boundary.

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CVSS v3.1 Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness Type (CWE)

CWE-125 Out-of-bounds Read

CWE-787 Out-of-bounds Write

References

Other References

https://github.com/openssl/openssl/commit/5965ea5dd6960f36d8b7f74f8eac67a8eb8f2b45 https://github.com/openssl/openssl/commit/9e91358f365dee6c446dcdcdb01c04d2743fd280 https://github.com/openssl/openssl/commit/a79c4ce559c6a3a8fd4109e9f33c1185d5bf2def https://github.com/openssl/openssl/commit/b5282d677551afda7d20e9c00e09561b547b2dfd https://github.com/openssl/openssl/commit/bae259a211ada6315dc50900686daaaaaa55f482 https://github.openssl.org/openssl/extended-releases/commit/c2b96348bfa662f25f4fabf81958ae822063dae3 https://github.openssl.org/openssl/extended-releases/commit/dfbaf161d8dafc1132dd88cd48ad990ed9b4c8ba https://openssl-library.org/news/secadv/20250930.txt http://www.openwall.com/lists/oss-security/2025/09/30/5 https://lists.debian.org/debian-lts-announce/2025/10/msg00001.html

Frequently Asked Questions

What is CVE-2025-9230? +

Issue summary: An application trying to decrypt CMS messages encrypted using password based encryption can trigger an out-of-bounds read and write. Impact summary: This out-of-bounds read may trigger a crash which leads to Denial of Service for an application. The out-of-bounds write can cause a memory corruption which can have various consequences including a Denial of Service or Execution of attacker-supplied code. Although the consequences of a successful exploit of this vulnerability could be severe, the probability that the attacker would be able to perform it is low. Besides, password based (PWRI) encryption support in CMS messages is very rarely used. For that reason the issue was assessed as Moderate severity according to our Security Policy. The FIPS modules in 3.5, 3.4, 3.3, 3.2, 3.1 and 3.0 are not affected by this issue, as the CMS implementation is outside the OpenSSL FIPS module boundary. It has a CVSS v3.1 base score of 7.5 (HIGH).

How severe is CVE-2025-9230? +

CVE-2025-9230 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

How do I check if I'm vulnerable to CVE-2025-9230? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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