Vulnerability-Lookup

CNVD-2020-04673

Vulnerability from cnvd - Published: 2020-02-11

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

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    "cve": {
      "cveNumber": "CVE-2020-7247"
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  "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 – Updated: 2025-10-21 23:35

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.

Severity

9.8 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: active Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-02-04 20:20 UTC

CWE

n/a
CWE-755 - Improper Handling of Exceptional Conditions

Assigner

mitre mitre root

References

15 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/9dcfda04547…	x_refsource_CONFIRM
http://packetstormsecurity.com/files/156137/OpenB…	x_refsource_MISC
https://seclists.org/bugtraq/2020/Jan/51	mailing-listx_refsource_BUGTRAQ
https://www.debian.org/security/2020/dsa-4611	vendor-advisoryx_refsource_DEBIAN
http://packetstormsecurity.com/files/156145/OpenS…	x_refsource_MISC
https://www.kb.cert.org/vuls/id/390745	third-party-advisoryx_refsource_CERT-VN
http://seclists.org/fulldisclosure/2020/Jan/49	mailing-listx_refsource_FULLDISC
http://packetstormsecurity.com/files/156249/OpenS…	x_refsource_MISC
http://packetstormsecurity.com/files/156295/OpenS…	x_refsource_MISC
https://usn.ubuntu.com/4268-1/	vendor-advisoryx_refsource_UBUNTU
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
http://packetstormsecurity.com/files/162093/OpenB…	x_refsource_MISC
https://www.cisa.gov/known-exploited-vulnerabilit…	government-resource

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": "2025-10-21T23:35:53.008Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CNVD-2020-04673

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

Tags

Sightings

Nomenclature

Related by attack behaviour