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jetty9 — security advisory

Type: advisorySources: OSVAdvisory ID: DEBIAN-CVE-2023-40167

Jetty is a Java based web server and servlet engine. Prior to versions 9.4.52, 10.0.16, 11.0.16, and 12.0.1, Jetty accepts the `+` character proceeding the content-length value in a HTTP/1 header field. This is more permissive than allowed by the RFC and other servers routinely reject such requests with 400 responses. There is no known exploit scenario, but it is conceivable that request smuggling could result if jetty is used in combination with a server that does not close the connection after sending such a 400 response. Versions 9.4.52, 10.0.16, 11.0.16, and 12.0.1 contain a patch for this issue. There is no workaround as there is no known exploit scenario.

Products
jetty9
Affected versions
9.4.50-4
Fixed versions
9.4.50-4+deb12u1, 9.4.52-1
CVEs
CVE-2023-40167
Confirmed fixed CVEs
Not specified
Updated in this feed
1 Nov 2026, 15:57 UTC · Revision 1

Source evidence

DEBIAN-CVE-2023-40167

core-osv · Original source

Published 15 Sept 2023, 20:15 UTC

Jetty is a Java based web server and servlet engine. Prior to versions 9.4.52, 10.0.16, 11.0.16, and 12.0.1, Jetty accepts the `+` character proceeding the content-length value in a HTTP/1 header field. This is more permissive than allowed by the RFC and other servers routinely reject such requests with 400 responses. There is no known exploit scenario, but it is conceivable that request smuggling could result if jetty is used in combination with a server that does not close the connection after sending such a 400 response. Versions 9.4.52, 10.0.16, 11.0.16, and 12.0.1 contain a patch for this issue. There is no workaround as there is no known exploit scenario.

osv:DEBIAN-CVE-2023-40167

jetty9

Fixed versions: 9.4.50-4+deb12u1

jetty9

Fixed versions: 9.4.52-1

jetty9

Fixed versions: 9.4.52-1

Complete source record
{
  "id": "b60e0229ccb14340dd881e5a55ba95ee431b840918ddd6811951542a9353a395",
  "url": "https://osv.dev/vulnerability/DEBIAN-CVE-2023-40167",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "DEBIAN-CVE-2023-40167",
    "summary": "Jetty is a Java based web server and servlet engine. Prior to versions 9.4.52, 10.0.16, 11.0.16, and 12.0.1, Jetty accepts the `+` character proceeding the content-length value in a HTTP/1 header field. This is more permissive than allowed by the RFC and other servers routinely reject such requests with 400 responses. There is no known exploit scenario, but it is conceivable that request smuggling could result if jetty is used in combination with a server that does not close the connection after sending such a 400 response. Versions 9.4.52, 10.0.16, 11.0.16, and 12.0.1 contain a patch for this issue. There is no workaround as there is no known exploit scenario.",
    "evidence": "osv:DEBIAN-CVE-2023-40167",
    "products": [
      {
        "name": {
          "value": "jetty9",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "9.4.50-4+deb12u1",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": [
          {
            "value": "9.4.50-4",
            "evidence": "/affected/0/versions"
          }
        ]
      },
      {
        "name": {
          "value": "jetty9",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "9.4.52-1",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "jetty9",
          "evidence": "/affected/2/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "9.4.52-1",
            "evidence": "/affected/2/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "medium",
    "structured": {
      "id": "DEBIAN-CVE-2023-40167",
      "aliases": [
        "DEBIAN-CVE-2023-40167"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "9.4.50-4+deb12u1"
                }
              ]
            }
          ],
          "package": {
            "name": "jetty9",
            "purl": "pkg:deb/debian/jetty9?arch=source&distro=bookworm",
            "ecosystem": "Debian:12"
          },
          "versions": [
            "9.4.50-4"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2023-40167.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "9.4.52-1"
                }
              ]
            }
          ],
          "package": {
            "name": "jetty9",
            "purl": "pkg:deb/debian/jetty9?arch=source&distro=trixie",
            "ecosystem": "Debian:13"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2023-40167.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "9.4.52-1"
                }
              ]
            }
          ],
          "package": {
            "name": "jetty9",
            "purl": "pkg:deb/debian/jetty9?arch=source&distro=forky",
            "ecosystem": "Debian:14"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2023-40167.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        }
      ],
      "modified": "2026-10-26T18:02:31.408183836Z",
      "provider": "osv",
      "upstream": [
        "CVE-2023-40167"
      ],
      "references": [
        "https://security-tracker.debian.org/tracker/CVE-2023-40167"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2023-40167",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 456164,
  "published_at": "2023-09-15T20:15:09.827+00:00"
}