CVE-2022-4450— OpenSSL 资源管理错误漏洞
一分钟漏洞结论
影响对象
OpenSSL OpenSSL
利用判断
利用概率较高，应尽快评估
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 存在安全漏洞，该漏洞源于在PEM_read_bio_ex函数中存在双重释放漏洞，攻击者利用该漏洞可以提供恶意PEM文件进行解析以实现拒绝服务攻击。
可能的 ATT&CK 技术 1 AI
T1499 · Endpoint Denial of Service
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一、 漏洞 CVE-2022-4450 基础信息
漏洞信息
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Vulnerability Title
Double free after calling PEM_read_bio_ex
来源: CVE Program / CVE List V5
Vulnerability Description
The function PEM_read_bio_ex() reads a PEM file from a BIO and parses and
decodes the "name" (e.g. "CERTIFICATE"), any header data and the payload data.
If the function succeeds then the "name_out", "header" and "data" arguments are
populated with pointers to buffers containing the relevant decoded data. The
caller is responsible for freeing those buffers. It is possible to construct a
PEM file that results in 0 bytes of payload data. In this case PEM_read_bio_ex()
will return a failure code but will populate the header argument with a pointer
to a buffer that has already been freed. If the caller also frees this buffer
then a double free will occur. This will most likely lead to a crash. This
could be exploited by an attacker who has the ability to supply malicious PEM
files for parsing to achieve a denial of service attack.
The functions PEM_read_bio() and PEM_read() are simple wrappers around
PEM_read_bio_ex() and therefore these functions are also directly affected.
These functions are also called indirectly by a number of other OpenSSL
functions including PEM_X509_INFO_read_bio_ex() and
SSL_CTX_use_serverinfo_file() which are also vulnerable. Some OpenSSL internal
uses of these functions are not vulnerable because the caller does not free the
header argument if PEM_read_bio_ex() returns a failure code. These locations
include the PEM_read_bio_TYPE() functions as well as the decoders introduced in
OpenSSL 3.0.
The OpenSSL asn1parse command line application is also impacted by this issue.
来源: CVE Program / CVE List V5
CVSS Information
N/A
来源: CVE Program / CVE List V5
Vulnerability Type
N/A
来源: CVE Program / CVE List V5
Vulnerability Title
OpenSSL 资源管理错误漏洞
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 存在安全漏洞，该漏洞源于在PEM_read_bio_ex函数中存在双重释放漏洞，攻击者利用该漏洞可以提供恶意PEM文件进行解析以实现拒绝服务攻击。
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-2022-4450 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2022-4450 厂商安全公告 (1)
-
https://www.openssl.org/news/secadv/20230207.txt vendor-advisory
CVE-2022-4450 其他参考 (2)
同批安全公告 · OpenSSL · 2023-02-08 · 共 7 条
| CVE-2022-4304 | OpenSSL 安全漏洞 | |
| CVE-2023-0215 | OpenSSL 资源管理错误漏洞 | |
| CVE-2023-0216 | OpenSSL 代码问题漏洞 | |
| CVE-2023-0217 | OpenSSL 代码问题漏洞 | |
| CVE-2023-0286 | OpenSSL 安全漏洞 | |
| CVE-2023-0401 | OpenSSL 代码问题漏洞 |
IV. Related Vulnerabilities
V. Comments for CVE-2022-4450
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