cnvd - cnvd-2020-04673

cnvd-2020-04673

Vulnerability from cnvd

Title: OpenSMTPD远程命令执行漏洞

Description:

OpenSMTPD是OpenBSD团队开发的一个免费的服务器端SMTP协议实现，通过RFC5321定义，也是OpenBSD项目的一部分。

OpenSMTPD存在远程命令执行漏洞。允许远程攻击者通过特制的smtp会话以根用户身份执行任意命令，如MAIL FROM字段中的shell元字符所示。

Severity: 高

Patch Name: OpenSMTPD远程命令执行漏洞的补丁

Patch Description:

OpenSMTPD是OpenBSD团队开发的一个免费的服务器端SMTP协议实现，通过RFC5321定义，也是OpenBSD项目的一部分。

OpenSMTPD存在远程命令执行漏洞。允许远程攻击者通过特制的smtp会话以根用户身份执行任意命令，如MAIL FROM字段中的shell元字符所示。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://github.com/openbsd/src/commit/9dcfda045474d8903224d175907bfc29761dcb45

Reference: https://nvd.nist.gov/vuln/detail/CVE-2020-7247

Impacted products

Name
OpenBSD OpenSMTPD

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2020-7247"
    }
  },
  "description": "OpenSMTPD\u662fOpenBSD\u56e2\u961f\u5f00\u53d1\u7684\u4e00\u4e2a\u514d\u8d39\u7684\u670d\u52a1\u5668\u7aefSMTP\u534f\u8bae\u5b9e\u73b0\uff0c\u901a\u8fc7RFC5321\u5b9a\u4e49\uff0c\u4e5f\u662fOpenBSD\u9879\u76ee\u7684\u4e00\u90e8\u5206\u3002\n\nOpenSMTPD\u5b58\u5728\u8fdc\u7a0b\u547d\u4ee4\u6267\u884c\u6f0f\u6d1e\u3002\u5141\u8bb8\u8fdc\u7a0b\u653b\u51fb\u8005\u901a\u8fc7\u7279\u5236\u7684smtp\u4f1a\u8bdd\u4ee5\u6839\u7528\u6237\u8eab\u4efd\u6267\u884c\u4efb\u610f\u547d\u4ee4\uff0c\u5982MAIL FROM\u5b57\u6bb5\u4e2d\u7684shell\u5143\u5b57\u7b26\u6240\u793a\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://github.com/openbsd/src/commit/9dcfda045474d8903224d175907bfc29761dcb45",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2020-04673",
  "openTime": "2020-02-11",
  "patchDescription": "OpenSMTPD\u662fOpenBSD\u56e2\u961f\u5f00\u53d1\u7684\u4e00\u4e2a\u514d\u8d39\u7684\u670d\u52a1\u5668\u7aefSMTP\u534f\u8bae\u5b9e\u73b0\uff0c\u901a\u8fc7RFC5321\u5b9a\u4e49\uff0c\u4e5f\u662fOpenBSD\u9879\u76ee\u7684\u4e00\u90e8\u5206\u3002\r\n\r\nOpenSMTPD\u5b58\u5728\u8fdc\u7a0b\u547d\u4ee4\u6267\u884c\u6f0f\u6d1e\u3002\u5141\u8bb8\u8fdc\u7a0b\u653b\u51fb\u8005\u901a\u8fc7\u7279\u5236\u7684smtp\u4f1a\u8bdd\u4ee5\u6839\u7528\u6237\u8eab\u4efd\u6267\u884c\u4efb\u610f\u547d\u4ee4\uff0c\u5982MAIL FROM\u5b57\u6bb5\u4e2d\u7684shell\u5143\u5b57\u7b26\u6240\u793a\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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  "products": {
    "product": "OpenBSD OpenSMTPD"
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  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2020-7247",
  "serverity": "\u9ad8",
  "submitTime": "2020-02-03",
  "title": "OpenSMTPD\u8fdc\u7a0b\u547d\u4ee4\u6267\u884c\u6f0f\u6d1e"
}

CVE-2020-7247 (GCVE-0-2020-7247)

Vulnerability from cvelistv5

Published

2020-01-29 15:53

Modified

2025-07-30 01:45

Severity ?

9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CWE

Summary

smtp_mailaddr in smtp_session.c in OpenSMTPD 6.6, as used in OpenBSD 6.6 and other products, allows remote attackers to execute arbitrary commands as root via a crafted SMTP session, as demonstrated by shell metacharacters in a MAIL FROM field. This affects the "uncommented" default configuration. The issue exists because of an incorrect return value upon failure of input validation.

References

▼	URL	Tags
	https://www.openbsd.org/security.html	x_refsource_CONFIRM
	http://www.openwall.com/lists/oss-security/2020/01/28/3	x_refsource_MISC
	https://github.com/openbsd/src/commit/9dcfda045474d8903224d175907bfc29761dcb45	x_refsource_CONFIRM
	http://packetstormsecurity.com/files/156137/OpenBSD-OpenSMTPD-Privilege-Escalation-Code-Execution.html	x_refsource_MISC
	https://seclists.org/bugtraq/2020/Jan/51	mailing-list, x_refsource_BUGTRAQ
	https://www.debian.org/security/2020/dsa-4611	vendor-advisory, x_refsource_DEBIAN
	http://packetstormsecurity.com/files/156145/OpenSMTPD-6.6.2-Remote-Code-Execution.html	x_refsource_MISC
	https://www.kb.cert.org/vuls/id/390745	third-party-advisory, x_refsource_CERT-VN
	http://seclists.org/fulldisclosure/2020/Jan/49	mailing-list, x_refsource_FULLDISC
	http://packetstormsecurity.com/files/156249/OpenSMTPD-MAIL-FROM-Remote-Code-Execution.html	x_refsource_MISC
	http://packetstormsecurity.com/files/156295/OpenSMTPD-6.6.1-Local-Privilege-Escalation.html	x_refsource_MISC
	https://usn.ubuntu.com/4268-1/	vendor-advisory, x_refsource_UBUNTU
	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OPH4QU4DNVHA7ACFXMYFCEP5PSXXPN4E/	vendor-advisory, x_refsource_FEDORA
	http://packetstormsecurity.com/files/162093/OpenBSD-OpenSMTPD-6.6-Remote-Code-Execution.html	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	n/a	n/a	Version: n/a

Show details on NVD website

JSON

To clipboard

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    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2020-7247",
    "datePublished": "2020-01-29T15:53:18.000Z",
    "dateReserved": "2020-01-20T00:00:00.000Z",
    "dateUpdated": "2025-07-30T01:45:50.129Z",
    "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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