CVE-2026-45447 — Issue summary: A specially crafted PKCS#7 or S/MIME signed...

windowsCWE-416 高危 CVE-2026-45447 CWE-825

发布于：1小时前📖 5分钟👁️ 1 次阅读

CVE-2026-45447 漏洞深度分析

漏洞概述

CVE 编号： CVE-2026-45447
CVSS 评分： 8.8（HIGH）
CVSS 向量： CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE 分类： CWE-416,CWE-825
漏洞状态： Modified
发布时间： 2026-06-09T17:17:19.277
最后更新： 2026-07-14T12:17:08.187

漏洞描述

Issue summary: A specially crafted PKCS#7 or S/MIME signed message could
trigger a use-after-free during PKCS#7 signature verification.

Impact summary: A use-after-free may result in process crashes, heap
corruption, or potentially remote code execution.

When processing a PKCS#7 or S/MIME signed message, if the SignedData
digestAlgorithms field is present as an empty ASN.1 SET, OpenSSL may
incorrectly free a caller-owned BIO during PKCS7_verify(). A subsequent
use of the BIO by the calling application results in a use-after-free
condition.

In the common case this occurs when the application later calls
BIO_free() on the BIO originally passed to PKCS7_verify(). Depending
on allocator behavior and application-specific BIO usage patterns, this
may result in a crash or other memory corruption. In some application
contexts this may potentially be exploitable for remote code execution.

Applications that process PKCS#7 or S/MIME signed messages using OpenSSL
PKCS#7 APIs may be affected. Applications using the CMS APIs for this
processing are not affected.

The FIPS modules in 4.0, 3.6, 3.5, 3.4, and 3.0 are not affected by this
issue, as the affected code is outside the OpenSSL FIPS module boundary.

影响分析

此漏洞的具体影响取决于实际利用场景。"

修复建议

及时关注厂商发布的安全更新和补丁
升级受影响组件到最新版本
如无法立即升级，参考厂商提供的临时缓解措施
加强网络访问控制和监控

参考链接

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