Vulnerability-Lookup

CNVD-2020-46785

Vulnerability from cnvd - Published: 2020-08-18

Title

Dovecot拒绝服务漏洞（ CNVD-2020-46785）

Description

Dovecot是一款开源的基于类Linux/UNIX系统的IMAP和POP3邮件服务器。 Dovecot 2.3.11.3之前版本中存在安全漏洞。远程攻击者可借助特制的e-mail消息利用该漏洞造成拒绝服务（资源消耗）。

Severity

中

Patch Name

Dovecot拒绝服务漏洞（ CNVD-2020-46785）的补丁

Patch Description

Dovecot是一款开源的基于类Linux/UNIX系统的IMAP和POP3邮件服务器。 Dovecot 2.3.11.3之前版本中存在安全漏洞。远程攻击者可借助特制的e-mail消息利用该漏洞造成拒绝服务（资源消耗）。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://dovecot.org/pipermail/dovecot-news/2020-August/000441.html

Reference

https://www.debian.org/security/2020/dsa-4745; https://security-tracker.debian.org/tracker/CVE-2020-12100; https://security-tracker.debian.org/tracker/CVE-2020-12673; https://security-tracker.debian.org/tracker/CVE-2020-12674

Impacted products

Name
Dovecot Dovecot < 2.3.11.3

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2020-12100",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2020-12100"
    }
  },
  "description": "Dovecot\u662f\u4e00\u6b3e\u5f00\u6e90\u7684\u57fa\u4e8e\u7c7bLinux/UNIX\u7cfb\u7edf\u7684IMAP\u548cPOP3\u90ae\u4ef6\u670d\u52a1\u5668\u3002\n\nDovecot 2.3.11.3\u4e4b\u524d\u7248\u672c\u4e2d\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\u3002\u8fdc\u7a0b\u653b\u51fb\u8005\u53ef\u501f\u52a9\u7279\u5236\u7684e-mail\u6d88\u606f\u5229\u7528\u8be5\u6f0f\u6d1e\u9020\u6210\u62d2\u7edd\u670d\u52a1\uff08\u8d44\u6e90\u6d88\u8017\uff09\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://dovecot.org/pipermail/dovecot-news/2020-August/000441.html",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2020-46785",
  "openTime": "2020-08-18",
  "patchDescription": "Dovecot\u662f\u4e00\u6b3e\u5f00\u6e90\u7684\u57fa\u4e8e\u7c7bLinux/UNIX\u7cfb\u7edf\u7684IMAP\u548cPOP3\u90ae\u4ef6\u670d\u52a1\u5668\u3002\r\n\r\nDovecot 2.3.11.3\u4e4b\u524d\u7248\u672c\u4e2d\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\u3002\u8fdc\u7a0b\u653b\u51fb\u8005\u53ef\u501f\u52a9\u7279\u5236\u7684e-mail\u6d88\u606f\u5229\u7528\u8be5\u6f0f\u6d1e\u9020\u6210\u62d2\u7edd\u670d\u52a1\uff08\u8d44\u6e90\u6d88\u8017\uff09\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": "Dovecot\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e\uff08 CNVD-2020-46785\uff09\u7684\u8865\u4e01",
  "products": {
    "product": "Dovecot Dovecot \u003c 2.3.11.3"
  },
  "referenceLink": "https://www.debian.org/security/2020/dsa-4745; https://security-tracker.debian.org/tracker/CVE-2020-12100; https://security-tracker.debian.org/tracker/CVE-2020-12673; https://security-tracker.debian.org/tracker/CVE-2020-12674",
  "serverity": "\u4e2d",
  "submitTime": "2020-08-17",
  "title": "Dovecot\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e\uff08 CNVD-2020-46785\uff09"
}

CVE-2020-12100 (GCVE-0-2020-12100)

Vulnerability from cvelistv5 – Published: 2020-08-12 15:07 – Updated: 2024-08-04 11:48

Summary

In Dovecot before 2.3.11.3, uncontrolled recursion in submission, lmtp, and lda allows remote attackers to cause a denial of service (resource consumption) via a crafted e-mail message with deeply nested MIME parts.

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root

References

12 references

URL	Tags
https://dovecot.org/security	x_refsource_MISC
http://www.openwall.com/lists/oss-security/2020/08/12/1	mailing-listx_refsource_MLIST
https://www.debian.org/security/2020/dsa-4745	vendor-advisoryx_refsource_DEBIAN
https://lists.debian.org/debian-lts-announce/2020…	mailing-listx_refsource_MLIST
https://usn.ubuntu.com/4456-1/	vendor-advisoryx_refsource_UBUNTU
https://usn.ubuntu.com/4456-2/	vendor-advisoryx_refsource_UBUNTU
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
https://security.gentoo.org/glsa/202009-02	vendor-advisoryx_refsource_GENTOO
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
http://www.openwall.com/lists/oss-security/2021/01/04/3	mailing-listx_refsource_MLIST
http://seclists.org/fulldisclosure/2021/Jan/18	mailing-listx_refsource_FULLDISC

Show details on NVD website

JSON

To clipboard

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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.

Detection rules are retrieved from Rulezet.

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-2020-46785

CVE-2020-12100 (GCVE-0-2020-12100)

Tags

Sightings

Nomenclature

Related by attack behaviour