Vulnerability-Lookup

UBUNTU-CVE-2017-16944 (CVE-2017-16944)

Vulnerability from osv_ubuntu – Published: 2017-11-27 00:00 – Updated: 2025-07-16 04:53 – Source website

Withdrawn 2025-07-18

Details

The receive_msg function in receive.c in the SMTP daemon in Exim 4.88 and 4.89 allows remote attackers to cause a denial of service (infinite loop and stack exhaustion) via vectors involving BDAT commands and an improper check for a '.' character signifying the end of the content, related to the bdat_getc function.

Severity

7.5 (High)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2017-16944	REPORT
	https://ubuntu.com/security/notices/USN-3499-1	ADVISORY
	https://www.cve.org/CVERecord?id=CVE-2017-16944	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "exim4",
            "binary_version": "4.82-3ubuntu2.3"
          },
          {
            "binary_name": "exim4-base",
            "binary_version": "4.82-3ubuntu2.3"
          },
          {
            "binary_name": "exim4-base-dbgsym",
            "binary_version": "4.82-3ubuntu2.3"
          },
          {
            "binary_name": "exim4-config",
            "binary_version": "4.82-3ubuntu2.3"
          },
          {
            "binary_name": "exim4-daemon-heavy",
            "binary_version": "4.82-3ubuntu2.3"
          },
          {
            "binary_name": "exim4-daemon-heavy-dbg",
            "binary_version": "4.82-3ubuntu2.3"
          },
          {
            "binary_name": "exim4-daemon-heavy-dbgsym",
            "binary_version": "4.82-3ubuntu2.3"
          },
          {
            "binary_name": "exim4-daemon-light",
            "binary_version": "4.82-3ubuntu2.3"
          },
          {
            "binary_name": "exim4-daemon-light-dbg",
            "binary_version": "4.82-3ubuntu2.3"
          },
          {
            "binary_name": "exim4-daemon-light-dbgsym",
            "binary_version": "4.82-3ubuntu2.3"
          },
          {
            "binary_name": "exim4-dbg",
            "binary_version": "4.82-3ubuntu2.3"
          },
          {
            "binary_name": "exim4-dev",
            "binary_version": "4.82-3ubuntu2.3"
          },
          {
            "binary_name": "eximon4",
            "binary_version": "4.82-3ubuntu2.3"
          },
          {
            "binary_name": "eximon4-dbgsym",
            "binary_version": "4.82-3ubuntu2.3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:14.04:LTS",
        "name": "exim4",
        "purl": "pkg:deb/ubuntu/exim4@4.82-3ubuntu2.3?arch=source\u0026distro=trusty"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.82-3ubuntu2.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.80-7ubuntu3",
        "4.80-7ubuntu4",
        "4.80-9ubuntu1",
        "4.80-9ubuntu2",
        "4.82-3ubuntu1",
        "4.82-3ubuntu2",
        "4.82-3ubuntu2.1",
        "4.82-3ubuntu2.2"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "exim4",
            "binary_version": "4.86.2-2ubuntu2.2"
          },
          {
            "binary_name": "exim4-base",
            "binary_version": "4.86.2-2ubuntu2.2"
          },
          {
            "binary_name": "exim4-base-dbgsym",
            "binary_version": "4.86.2-2ubuntu2.2"
          },
          {
            "binary_name": "exim4-config",
            "binary_version": "4.86.2-2ubuntu2.2"
          },
          {
            "binary_name": "exim4-daemon-heavy",
            "binary_version": "4.86.2-2ubuntu2.2"
          },
          {
            "binary_name": "exim4-daemon-heavy-dbg",
            "binary_version": "4.86.2-2ubuntu2.2"
          },
          {
            "binary_name": "exim4-daemon-heavy-dbgsym",
            "binary_version": "4.86.2-2ubuntu2.2"
          },
          {
            "binary_name": "exim4-daemon-light",
            "binary_version": "4.86.2-2ubuntu2.2"
          },
          {
            "binary_name": "exim4-daemon-light-dbg",
            "binary_version": "4.86.2-2ubuntu2.2"
          },
          {
            "binary_name": "exim4-daemon-light-dbgsym",
            "binary_version": "4.86.2-2ubuntu2.2"
          },
          {
            "binary_name": "exim4-dbg",
            "binary_version": "4.86.2-2ubuntu2.2"
          },
          {
            "binary_name": "exim4-dev",
            "binary_version": "4.86.2-2ubuntu2.2"
          },
          {
            "binary_name": "eximon4",
            "binary_version": "4.86.2-2ubuntu2.2"
          },
          {
            "binary_name": "eximon4-dbgsym",
            "binary_version": "4.86.2-2ubuntu2.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "exim4",
        "purl": "pkg:deb/ubuntu/exim4@4.86.2-2ubuntu2.2?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.86.2-2ubuntu2.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.86-3ubuntu1",
        "4.86-7ubuntu1",
        "4.86-7ubuntu2",
        "4.86-7ubuntu3",
        "4.86.2-2ubuntu1",
        "4.86.2-2ubuntu2",
        "4.86.2-2ubuntu2.1"
      ]
    }
  ],
  "aliases": [],
  "details": "The receive_msg function in receive.c in the SMTP daemon in Exim 4.88 and 4.89 allows remote attackers to cause a denial of service (infinite loop and stack exhaustion) via vectors involving BDAT commands and an improper check for a \u0027.\u0027 character signifying the end of the content, related to the bdat_getc function.",
  "id": "UBUNTU-CVE-2017-16944",
  "modified": "2025-07-16T04:53:09Z",
  "published": "2017-11-27T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2017-16944"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-3499-1"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2017-16944"
    }
  ],
  "related": [
    "USN-3499-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2017-16944"
  ],
  "withdrawn": "2025-07-18T16:44:15Z"
}

CVE-2017-16944 (GCVE-0-2017-16944)

Vulnerability from cvelistv5 – Published: 2017-11-25 17:00 – Updated: 2024-08-05 20:43

Summary

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root

References

9 references

URL	Tags
https://lists.exim.org/lurker/message/20171125.03…	x_refsource_MISC
http://openwall.com/lists/oss-security/2017/11/25/3	x_refsource_MISC
https://bugs.exim.org/show_bug.cgi?id=2201	x_refsource_MISC
http://openwall.com/lists/oss-security/2017/11/25/1	x_refsource_MISC
http://www.securitytracker.com/id/1039873	vdb-entryx_refsource_SECTRACK
http://openwall.com/lists/oss-security/2017/11/25/2	x_refsource_MISC
https://www.debian.org/security/2017/dsa-4053	vendor-advisoryx_refsource_DEBIAN
https://www.exploit-db.com/exploits/43184/	exploitx_refsource_EXPLOIT-DB
http://www.openwall.com/lists/oss-security/2021/05/04/7	mailing-listx_refsource_MLIST

Date Public

2017-11-25 00:00

Show details on NVD website

JSON

To clipboard

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            "url": "https://lists.exim.org/lurker/message/20171125.034842.d1d75cac.en.html"
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            "url": "https://bugs.exim.org/show_bug.cgi?id=2201"
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          "name": "DSA-4053",
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          "url": "https://www.debian.org/security/2017/dsa-4053"
        },
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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.

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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Action not permitted

UBUNTU-CVE-2017-16944 (CVE-2017-16944)

CVE-2017-16944 (GCVE-0-2017-16944)

Tags

Sightings

Nomenclature

Related by attack behaviour