cnvd - cnvd-2021-71263

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

Patch Name: openssl缓冲区溢出漏洞（CNVD-2021-71263）的补丁

Patch Description:

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

Show details on source website

JSON

To clipboard

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    "cve": {
      "cveNumber": "CVE-2021-3712"
    }
  },
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  "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",
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  "serverity": "\u4e2d",
  "submitTime": "2021-08-26",
  "title": "openssl\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\uff08CNVD-2021-71263\uff09"
}

CVE-2021-3712 (GCVE-0-2021-3712)

Vulnerability from cvelistv5

Published

2021-08-24 14:50

Modified

2024-09-16 20:32

Severity ?

CWE

Buffer overflow

Summary

ASN.1 strings are represented internally within OpenSSL as an ASN1_STRING structure which contains a buffer holding the string data and a field holding the buffer length. This contrasts with normal C strings which are repesented as a buffer for the string data which is terminated with a NUL (0) byte. Although not a strict requirement, ASN.1 strings that are parsed using OpenSSL's own "d2i" functions (and other similar parsing functions) as well as any string whose value has been set with the ASN1_STRING_set() function will additionally NUL terminate the byte array in the ASN1_STRING structure. However, it is possible for applications to directly construct valid ASN1_STRING structures which do not NUL terminate the byte array by directly setting the "data" and "length" fields in the ASN1_STRING array. This can also happen by using the ASN1_STRING_set0() function. Numerous OpenSSL functions that print ASN.1 data have been found to assume that the ASN1_STRING byte array will be NUL terminated, even though this is not guaranteed for strings that have been directly constructed. Where an application requests an ASN.1 structure to be printed, and where that ASN.1 structure contains ASN1_STRINGs that have been directly constructed by the application without NUL terminating the "data" field, then a read buffer overrun can occur. The same thing can also occur during name constraints processing of certificates (for example if a certificate has been directly constructed by the application instead of loading it via the OpenSSL parsing functions, and the certificate contains non NUL terminated ASN1_STRING structures). It can also occur in the X509_get1_email(), X509_REQ_get1_email() and X509_get1_ocsp() functions. If a malicious actor can cause an application to directly construct an ASN1_STRING and then process it through one of the affected OpenSSL functions then this issue could be hit. This might result in a crash (causing a Denial of Service attack). It could also result in the disclosure of private memory contents (such as private keys, or sensitive plaintext). Fixed in OpenSSL 1.1.1l (Affected 1.1.1-1.1.1k). Fixed in OpenSSL 1.0.2za (Affected 1.0.2-1.0.2y).

References

▼	URL	Tags
	https://www.openssl.org/news/secadv/20210824.txt
	https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=94d23fcff9b2a7a8368dfe52214d5c2569882c11
	https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=ccb0a11145ee72b042d10593a64eaf9e8a55ec12
	https://www.debian.org/security/2021/dsa-4963	vendor-advisory
	https://lists.apache.org/thread.html/r18995de860f0e63635f3008fd2a6aca82394249476d21691e7c59c9e%40%3Cdev.tomcat.apache.org%3E	mailing-list
	http://www.openwall.com/lists/oss-security/2021/08/26/2	mailing-list
	https://lists.apache.org/thread.html/rad5d9f83f0d11fb3f8bb148d179b8a9ad7c6a17f18d70e5805a713d1%40%3Cdev.tomcat.apache.org%3E	mailing-list
	https://security.netapp.com/advisory/ntap-20210827-0010/
	https://lists.debian.org/debian-lts-announce/2021/09/msg00014.html	mailing-list
	https://lists.debian.org/debian-lts-announce/2021/09/msg00021.html	mailing-list
	https://www.oracle.com/security-alerts/cpuoct2021.html
	https://www.tenable.com/security/tns-2021-16
	https://kc.mcafee.com/corporate/index?page=content&id=SB10366
	https://www.oracle.com/security-alerts/cpujan2022.html
	https://www.tenable.com/security/tns-2022-02
	https://www.oracle.com/security-alerts/cpuapr2022.html
	https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf
	https://cert-portal.siemens.com/productcert/pdf/ssa-244969.pdf
	https://security.gentoo.org/glsa/202209-02	vendor-advisory
	https://security.gentoo.org/glsa/202210-02	vendor-advisory
	https://security.netapp.com/advisory/ntap-20240621-0006/

Impacted products

	Vendor	Product	Version
	OpenSSL	OpenSSL	Version: Fixed in OpenSSL 1.1.1l (Affected 1.1.1-1.1.1k) Version: Fixed in OpenSSL 1.0.2za (Affected 1.0.2-1.0.2y)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
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      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T17:01:08.180Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
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          {
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          },
          {
            "name": "[oss-security] 20210825 OpenSSL SM2 Decryption Buffer Overflow (CVE-2021-3711), Read buffer overruns processing ASN.1 strings (CVE-2021-3712)",
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            "url": "http://www.openwall.com/lists/oss-security/2021/08/26/2"
          },
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            "name": "[tomcat-dev] 20210826 Re: OpenSSL security announcement - do we need a Tomcat Native release?",
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            "url": "https://www.tenable.com/security/tns-2021-16"
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            "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf"
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            "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-244969.pdf"
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            "tags": [
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            "url": "https://security.netapp.com/advisory/ntap-20240621-0006/"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
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        {
          "product": "OpenSSL",
          "vendor": "OpenSSL",
          "versions": [
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      "credits": [
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          "value": "Ingo Schwarze"
        }
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      "descriptions": [
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        }
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      "metrics": [
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              "url": "https://www.openssl.org/policies/secpolicy.html#Moderate",
              "value": "Moderate"
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      "providerMetadata": {
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          "tags": [
            "vendor-advisory"
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          "url": "https://www.debian.org/security/2021/dsa-4963"
        },
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          "name": "[tomcat-dev] 20210825 OpenSSL security announcement - do we need a Tomcat Native release?",
          "tags": [
            "mailing-list"
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          "url": "https://lists.apache.org/thread.html/r18995de860f0e63635f3008fd2a6aca82394249476d21691e7c59c9e%40%3Cdev.tomcat.apache.org%3E"
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          "tags": [
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      "title": "Read buffer overruns processing ASN.1 strings"
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  "cveMetadata": {
    "assignerOrgId": "3a12439a-ef3a-4c79-92e6-6081a721f1e5",
    "assignerShortName": "openssl",
    "cveId": "CVE-2021-3712",
    "datePublished": "2021-08-24T14:50:14.704334Z",
    "dateReserved": "2021-08-16T00:00:00",
    "dateUpdated": "2024-09-16T20:32:42.201Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

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.
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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