Out-of-bounds read & write in RFC 3211 KEK Unwrap

7.5 / 10

HIGH

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

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.

Basic Information

ID CVE-2025-9230

Source openssl

Published Sep 30, 2025 at 13:17

Modified Sep 30, 2025 at 19:30

Affected Product

Vendor OpenSSL

Product OpenSSL

Version 3.5.0

Affected Versions OpenSSL OpenSSL 3.5.0
OpenSSL OpenSSL 3.4.0
OpenSSL OpenSSL 3.3.0
OpenSSL OpenSSL 3.2.0
OpenSSL OpenSSL 3.0.0
OpenSSL OpenSSL 1.1.1
OpenSSL OpenSSL 1.0.2

CWE Classification

CWE-125 CWE-787

References

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    "lastseen": "",
    "description": "Issue summary: An application trying to decrypt CMS messages encrypted using\npassword based encryption can trigger an out-of-bounds read and write.\n\nImpact summary: This out-of-bounds read may trigger a crash which leads to\nDenial of Service for an application. The out-of-bounds write can cause\na memory corruption which can have various consequences including\na Denial of Service or Execution of attacker-supplied code.\n\nAlthough the consequences of a successful exploit of this vulnerability\ncould be severe, the probability that the attacker would be able to\nperform it is low. Besides, password based (PWRI) encryption support in CMS\nmessages is very rarely used. For that reason the issue was assessed as\nModerate severity according to our Security Policy.\n\nThe FIPS modules in 3.5, 3.4, 3.3, 3.2, 3.1 and 3.0 are not affected by this\nissue, as the CMS implementation is outside the OpenSSL FIPS module\nboundary.",
    "published": "2025-09-30T13:17:00.808Z",
    "modified": "2025-09-30T19:30:29.803Z",
    "type": "cve",
    "title": "Out-of-bounds read & write in RFC 3211 KEK Unwrap",
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    "references": "https://openssl-library.org/news/secadv/20250930.txt\nhttps://github.com/openssl/openssl/commit/bae259a211ada6315dc50900686daaaaaa55f482\nhttps://github.com/openssl/openssl/commit/9e91358f365dee6c446dcdcdb01c04d2743fd280\nhttps://github.com/openssl/openssl/commit/5965ea5dd6960f36d8b7f74f8eac67a8eb8f2b45\nhttps://github.com/openssl/openssl/commit/b5282d677551afda7d20e9c00e09561b547b2dfd\nhttps://github.com/openssl/openssl/commit/a79c4ce559c6a3a8fd4109e9f33c1185d5bf2def\nhttps://github.openssl.org/openssl/extended-releases/commit/dfbaf161d8dafc1132dd88cd48ad990ed9b4c8ba\nhttps://github.openssl.org/openssl/extended-releases/commit/c2b96348bfa662f25f4fabf81958ae822063dae3",
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Out-of-bounds read & write in RFC 3211 KEK Unwrap_CVE-2025-9230