cnvd-2021-71263
Vulnerability from cnvd
Title
openssl缓冲区溢出漏洞（CNVD-2021-71263）
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存在缓冲区溢出漏洞，该漏洞源于产品假设 ASN.1 字符串使用NULL作为终止符。攻击者可通过制作非NULL终止的字符串发起攻击可导致应用程序内存崩溃或者应用程序崩溃。
Severity
中
VLAI Severity ?
Patch Name
openssl缓冲区溢出漏洞（CNVD-2021-71263）的补丁
Patch 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存在缓冲区溢出漏洞，该漏洞源于产品假设 ASN.1 字符串使用NULL作为终止符。攻击者可通过制作非NULL终止的字符串发起攻击可导致应用程序内存崩溃或者应用程序崩溃。目前，供应商发布了安全公告及相关补丁信息，修复了此漏洞。
Formal description
目前厂商已发布升级补丁以修复漏洞，补丁获取链接： https://git.openssl.org/?p=openssl.git;a=summary
Reference
https://access.redhat.com/security/cve/cve-2021-3712
Impacted products
| Name | Openssl Openssl |
|---|
{
"cves": {
"cve": {
"cveNumber": "CVE-2021-3712"
}
},
"description": "OpenSSL\u662fOpenssl\u56e2\u961f\u7684\u4e00\u4e2a\u5f00\u6e90\u7684\u80fd\u591f\u5b9e\u73b0\u5b89\u5168\u5957\u63a5\u5c42\uff08SSLv2/v3\uff09\u548c\u5b89\u5168\u4f20\u8f93\u5c42\uff08TLSv1\uff09\u534f\u8bae\u7684\u901a\u7528\u52a0\u5bc6\u5e93\u3002\u8be5\u4ea7\u54c1\u652f\u6301\u591a\u79cd\u52a0\u5bc6\u7b97\u6cd5\uff0c\u5305\u62ec\u5bf9\u79f0\u5bc6\u7801\u3001\u54c8\u5e0c\u7b97\u6cd5\u3001\u5b89\u5168\u6563\u5217\u7b97\u6cd5\u7b49\u3002\n\nopenssl\u5b58\u5728\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u4ea7\u54c1\u5047\u8bbe ASN.1 \u5b57\u7b26\u4e32\u4f7f\u7528NULL\u4f5c\u4e3a\u7ec8\u6b62\u7b26\u3002\u653b\u51fb\u8005\u53ef\u901a\u8fc7\u5236\u4f5c\u975eNULL\u7ec8\u6b62\u7684\u5b57\u7b26\u4e32\u53d1\u8d77\u653b\u51fb\u53ef\u5bfc\u81f4\u5e94\u7528\u7a0b\u5e8f\u5185\u5b58\u5d29\u6e83\u6216\u8005\u5e94\u7528\u7a0b\u5e8f\u5d29\u6e83\u3002",
"formalWay": "\u76ee\u524d\u5382\u5546\u5df2\u53d1\u5e03\u5347\u7ea7\u8865\u4e01\u4ee5\u4fee\u590d\u6f0f\u6d1e\uff0c\u8865\u4e01\u83b7\u53d6\u94fe\u63a5\uff1a\r\nhttps://git.openssl.org/?p=openssl.git;a=summary",
"isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
"number": "CNVD-2021-71263",
"openTime": "2021-09-15",
"patchDescription": "OpenSSL\u662fOpenssl\u56e2\u961f\u7684\u4e00\u4e2a\u5f00\u6e90\u7684\u80fd\u591f\u5b9e\u73b0\u5b89\u5168\u5957\u63a5\u5c42\uff08SSLv2/v3\uff09\u548c\u5b89\u5168\u4f20\u8f93\u5c42\uff08TLSv1\uff09\u534f\u8bae\u7684\u901a\u7528\u52a0\u5bc6\u5e93\u3002\u8be5\u4ea7\u54c1\u652f\u6301\u591a\u79cd\u52a0\u5bc6\u7b97\u6cd5\uff0c\u5305\u62ec\u5bf9\u79f0\u5bc6\u7801\u3001\u54c8\u5e0c\u7b97\u6cd5\u3001\u5b89\u5168\u6563\u5217\u7b97\u6cd5\u7b49\u3002\r\n\r\nopenssl\u5b58\u5728\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u4ea7\u54c1\u5047\u8bbe ASN.1 \u5b57\u7b26\u4e32\u4f7f\u7528NULL\u4f5c\u4e3a\u7ec8\u6b62\u7b26\u3002\u653b\u51fb\u8005\u53ef\u901a\u8fc7\u5236\u4f5c\u975eNULL\u7ec8\u6b62\u7684\u5b57\u7b26\u4e32\u53d1\u8d77\u653b\u51fb\u53ef\u5bfc\u81f4\u5e94\u7528\u7a0b\u5e8f\u5185\u5b58\u5d29\u6e83\u6216\u8005\u5e94\u7528\u7a0b\u5e8f\u5d29\u6e83\u3002\u76ee\u524d\uff0c\u4f9b\u5e94\u5546\u53d1\u5e03\u4e86\u5b89\u5168\u516c\u544a\u53ca\u76f8\u5173\u8865\u4e01\u4fe1\u606f\uff0c\u4fee\u590d\u4e86\u6b64\u6f0f\u6d1e\u3002",
"patchName": "openssl\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\uff08CNVD-2021-71263\uff09\u7684\u8865\u4e01",
"products": {
"product": "Openssl Openssl"
},
"referenceLink": "https://access.redhat.com/security/cve/cve-2021-3712",
"serverity": "\u4e2d",
"submitTime": "2021-08-26",
"title": "openssl\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\uff08CNVD-2021-71263\uff09"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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