CVE-2023-4807— OpenSSL 安全漏洞
一分钟漏洞结论
影响对象
OpenSSL OpenSSL
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
OpenSSL是OpenSSL团队的一个开源的能够实现安全套接层（SSLv2/v3）和安全传输层（TLSv1）协议的通用加密库。该产品支持多种加密算法，包括对称密码、哈希算法、安全散列算法等。 OpenSSL 1.1.1 至 1.1.1v版本、3.0.0 至 3.0.10 版本以及 3.1.0 至 3.1.2版本存在安全漏洞，该漏洞源于POLY1305 MAC（消息身份验证代码）包含一个错误，当在支持 AVX512-IFMA 指令的较新 X86_64 处理器上运行时，可能会破坏 Windows 64 平台
可能的 ATT&CK 技术 1 AI
T1498 · Network Denial of Service
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一、 漏洞 CVE-2023-4807 基础信息
漏洞信息
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Vulnerability Title
POLY1305 MAC implementation corrupts XMM registers on Windows
来源: CVE Program / CVE List V5
Vulnerability Description
Issue summary: The POLY1305 MAC (message authentication code) implementation
contains a bug that might corrupt the internal state of applications on the
Windows 64 platform when running on newer X86_64 processors supporting the
AVX512-IFMA instructions.
Impact summary: If in an application that uses the OpenSSL library an attacker
can influence whether the POLY1305 MAC algorithm is used, the application
state might be corrupted with various application dependent consequences.
The POLY1305 MAC (message authentication code) implementation in OpenSSL does
not save the contents of non-volatile XMM registers on Windows 64 platform
when calculating the MAC of data larger than 64 bytes. Before returning to
the caller all the XMM registers are set to zero rather than restoring their
previous content. The vulnerable code is used only on newer x86_64 processors
supporting the AVX512-IFMA instructions.
The consequences of this kind of internal application state corruption can
be various - from no consequences, if the calling application does not
depend on the contents of non-volatile XMM registers at all, to the worst
consequences, where the attacker could get complete control of the application
process. However given the contents of the registers are just zeroized so
the attacker cannot put arbitrary values inside, the most likely consequence,
if any, would be an incorrect result of some application dependent
calculations or a crash leading to a denial of service.
The POLY1305 MAC algorithm is most frequently used as part of the
CHACHA20-POLY1305 AEAD (authenticated encryption with associated data)
algorithm. The most common usage of this AEAD cipher is with TLS protocol
versions 1.2 and 1.3 and a malicious client can influence whether this AEAD
cipher is used by the server. This implies that server applications using
OpenSSL can be potentially impacted. However we are currently not aware of
any concrete application that would be affected by this issue therefore we
consider this a Low severity security issue.
As a workaround the AVX512-IFMA instructions support can be disabled at
runtime by setting the environment variable OPENSSL_ia32cap:
OPENSSL_ia32cap=:~0x200000
The FIPS provider is not affected by this issue.
来源: CVE Program / CVE List V5
CVSS Information
N/A
来源: CVE Program / CVE List V5
Vulnerability Type
预期行为违背
来源: CVE Program / CVE List V5
Vulnerability Title
OpenSSL 安全漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
OpenSSL是OpenSSL团队的一个开源的能够实现安全套接层（SSLv2/v3）和安全传输层（TLSv1）协议的通用加密库。该产品支持多种加密算法，包括对称密码、哈希算法、安全散列算法等。 OpenSSL 1.1.1 至 1.1.1v版本、3.0.0 至 3.0.10 版本以及 3.1.0 至 3.1.2版本存在安全漏洞，该漏洞源于POLY1305 MAC（消息身份验证代码）包含一个错误，当在支持 AVX512-IFMA 指令的较新 X86_64 处理器上运行时，可能会破坏 Windows 64 平台
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD
受影响产品
二、漏洞 CVE-2023-4807 的公开POC
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CVE-2023-4807 厂商安全公告 (2)
-
https://www.openssl.org/news/secadv/20230908.txt vendor-advisory
CVE-2023-4807 其他参考 (2)
IV. Related Vulnerabilities
V. Comments for CVE-2023-4807
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