Vulnerability-Lookup

CNVD-2017-05204

Vulnerability from cnvd - Published: 2017-04-24

Title

Dovecot远程拒绝服务漏洞

Description

Dovecot是一款开源的基于类Linux/UNIX系统的IMAP和POP3邮件服务器。 Dovecot2.2.26版本至2.2.28版本中存在远程拒绝服务漏洞。远程攻击者可利用该漏洞造成进程崩溃或占用过多CPU资源，导致拒绝服务。

Severity

中

Patch Name

Dovecot远程拒绝服务漏洞的补丁

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。 Dovecot2.2.26版本至2.2.28版本中存在远程拒绝服务漏洞。远程攻击者可利用该漏洞造成进程崩溃或占用过多CPU资源，导致拒绝服务。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

厂商已发布了漏洞修复程序，请及时关注更新： https://github.com/dovecot/core/commit/a3783f8a3c9cd816b51e77a922f82301512fcf22

Reference

http://www.securityfocus.com/bid/97536

Impacted products

Name
Dovecot Dovecot >=2.2.26，<=2.2.28

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2017-2669"
    }
  },
  "description": "Dovecot\u662f\u4e00\u6b3e\u5f00\u6e90\u7684\u57fa\u4e8e\u7c7bLinux/UNIX\u7cfb\u7edf\u7684IMAP\u548cPOP3\u90ae\u4ef6\u670d\u52a1\u5668\u3002\r\n\r\nDovecot2.2.26\u7248\u672c\u81f32.2.28\u7248\u672c\u4e2d\u5b58\u5728\u8fdc\u7a0b\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e\u3002\u8fdc\u7a0b\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u9020\u6210\u8fdb\u7a0b\u5d29\u6e83\u6216\u5360\u7528\u8fc7\u591aCPU\u8d44\u6e90\uff0c\u5bfc\u81f4\u62d2\u7edd\u670d\u52a1\u3002",
  "discovererName": "Dovecot",
  "formalWay": "\u5382\u5546\u5df2\u53d1\u5e03\u4e86\u6f0f\u6d1e\u4fee\u590d\u7a0b\u5e8f\uff0c\u8bf7\u53ca\u65f6\u5173\u6ce8\u66f4\u65b0\uff1a\r\nhttps://github.com/dovecot/core/commit/a3783f8a3c9cd816b51e77a922f82301512fcf22",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2017-05204",
  "openTime": "2017-04-24",
  "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\nDovecot2.2.26\u7248\u672c\u81f32.2.28\u7248\u672c\u4e2d\u5b58\u5728\u8fdc\u7a0b\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e\u3002\u8fdc\u7a0b\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u9020\u6210\u8fdb\u7a0b\u5d29\u6e83\u6216\u5360\u7528\u8fc7\u591aCPU\u8d44\u6e90\uff0c\u5bfc\u81f4\u62d2\u7edd\u670d\u52a1\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\u8fdc\u7a0b\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "Dovecot Dovecot \u003e=2.2.26\uff0c\u003c=2.2.28"
  },
  "referenceLink": "http://www.securityfocus.com/bid/97536",
  "serverity": "\u4e2d",
  "submitTime": "2017-04-13",
  "title": "Dovecot\u8fdc\u7a0b\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e"
}

CVE-2017-2669 (GCVE-0-2017-2669)

Vulnerability from cvelistv5 – Published: 2018-06-21 13:00 – Updated: 2024-08-05 14:02

Summary

Dovecot before version 2.2.29 is vulnerable to a denial of service. When 'dict' passdb and userdb were used for user authentication, the username sent by the IMAP/POP3 client was sent through var_expand() to perform %variable expansion. Sending specially crafted %variable fields could result in excessive memory usage causing the process to crash (and restart), or excessive CPU usage causing all authentications to hang.

Severity

3.7 (Low)


                        
                          CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

CWE

CWE-20

Assigner

redhat redhat root

References

6 references

URL	Tags
https://dovecot.org/pipermail/dovecot-news/2017-A…	mailing-listx_refsource_MLIST
http://www.openwall.com/lists/oss-security/2017/04/11/1	mailing-listx_refsource_MLIST
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2…	x_refsource_CONFIRM
https://github.com/dovecot/core/commit/000030feb7…	x_refsource_CONFIRM
https://www.debian.org/security/2017/dsa-3828	vendor-advisoryx_refsource_DEBIAN
http://www.securityfocus.com/bid/97536	vdb-entryx_refsource_BID

Impacted products

1 product

Vendor	Product	Version
[UNKNOWN]	dovecot	Affected: dovecot 2.2.29

Date Public

2017-04-10 00:00

Show details on NVD website

JSON

To clipboard

{
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    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-05T14:02:06.877Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "name": "[dovecot-news] 20170410 v2.2.29 released",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "https://dovecot.org/pipermail/dovecot-news/2017-April/000341.html"
          },
          {
            "name": "[oss-security] 20170411 CVE-2017-2669: Dovecot DoS when passdb dict was used for authentication",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2017/04/11/1"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
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            ],
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          },
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            "tags": [
              "x_refsource_CONFIRM",
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            ],
            "url": "https://github.com/dovecot/core/commit/000030feb7a30f193197f1aab8a7b04a26b42735.patch"
          },
          {
            "name": "DSA-3828",
            "tags": [
              "vendor-advisory",
              "x_refsource_DEBIAN",
              "x_transferred"
            ],
            "url": "https://www.debian.org/security/2017/dsa-3828"
          },
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            "tags": [
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              "x_refsource_BID",
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            ],
            "url": "http://www.securityfocus.com/bid/97536"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
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          "product": "dovecot",
          "vendor": "[UNKNOWN]",
          "versions": [
            {
              "status": "affected",
              "version": "dovecot 2.2.29"
            }
          ]
        }
      ],
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        }
      ],
      "metrics": [
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            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 3.7,
            "baseSeverity": "LOW",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L",
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          "name": "[dovecot-news] 20170410 v2.2.29 released",
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        },
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          "tags": [
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          ],
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-2669"
        },
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/dovecot/core/commit/000030feb7a30f193197f1aab8a7b04a26b42735.patch"
        },
        {
          "name": "DSA-3828",
          "tags": [
            "vendor-advisory",
            "x_refsource_DEBIAN"
          ],
          "url": "https://www.debian.org/security/2017/dsa-3828"
        },
        {
          "name": "97536",
          "tags": [
            "vdb-entry",
            "x_refsource_BID"
          ],
          "url": "http://www.securityfocus.com/bid/97536"
        }
      ],
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            "vendor_data": [
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                    {
                      "product_name": "dovecot",
                      "version": {
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                          {
                            "version_value": "dovecot 2.2.29"
                          }
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                      }
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            }
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            },
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              "name": "[oss-security] 20170411 CVE-2017-2669: Dovecot DoS when passdb dict was used for authentication",
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            },
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    "state": "PUBLISHED"
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  "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.

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.

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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.

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CNVD-2017-05204

CVE-2017-2669 (GCVE-0-2017-2669)

Tags

Sightings

Nomenclature

Related by attack behaviour