GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration

UBUNTU-CVE-2019-11555 (CVE-2019-11555)

Vulnerability from osv_ubuntu – Published: 2019-04-26 00:00 – Updated: 2025-10-14 16:48 – Source website
VLAI
Details

The EAP-pwd implementation in hostapd (EAP server) before 2.8 and wpa_supplicant (EAP peer) before 2.8 does not validate fragmentation reassembly state properly for a case where an unexpected fragment could be received. This could result in process termination due to a NULL pointer dereference (denial of service). This affects eap_server/eap_server_pwd.c and eap_peer/eap_pwd.c.

Severity
5.9 (Medium)
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "hostapd",
            "binary_version": "1:2.1-0ubuntu1.7+esm1"
          },
          {
            "binary_name": "wpagui",
            "binary_version": "2.1-0ubuntu1.7+esm1"
          },
          {
            "binary_name": "wpasupplicant",
            "binary_version": "2.1-0ubuntu1.7+esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:14.04:LTS",
        "name": "wpa",
        "purl": "pkg:deb/ubuntu/wpa@2.1-0ubuntu1.7+esm1?arch=source\u0026distro=trusty/esm"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.1-0ubuntu1.7+esm1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.0-3ubuntu2",
        "1.0-3ubuntu3",
        "1.0-3ubuntu4",
        "2.1-0ubuntu1",
        "2.1-0ubuntu1.1",
        "2.1-0ubuntu1.2",
        "2.1-0ubuntu1.3",
        "2.1-0ubuntu1.4",
        "2.1-0ubuntu1.5",
        "2.1-0ubuntu1.6",
        "2.1-0ubuntu1.7"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "hostapd",
            "binary_version": "1:2.4-0ubuntu6.5"
          },
          {
            "binary_name": "wpagui",
            "binary_version": "2.4-0ubuntu6.5"
          },
          {
            "binary_name": "wpasupplicant",
            "binary_version": "2.4-0ubuntu6.5"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "wpa",
        "purl": "pkg:deb/ubuntu/wpa@2.4-0ubuntu6.5?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.4-0ubuntu6.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.4-0ubuntu3",
        "2.4-0ubuntu4",
        "2.4-0ubuntu5",
        "2.4-0ubuntu6",
        "2.4-0ubuntu6.2",
        "2.4-0ubuntu6.3",
        "2.4-0ubuntu6.4"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "hostapd",
            "binary_version": "2:2.6-15ubuntu2.3"
          },
          {
            "binary_name": "wpagui",
            "binary_version": "2:2.6-15ubuntu2.3"
          },
          {
            "binary_name": "wpasupplicant",
            "binary_version": "2:2.6-15ubuntu2.3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "wpa",
        "purl": "pkg:deb/ubuntu/wpa@2:2.6-15ubuntu2.3?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2:2.6-15ubuntu2.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.4-0ubuntu10",
        "2:2.4-1.1ubuntu1",
        "2:2.6-15ubuntu1",
        "2:2.6-15ubuntu2",
        "2:2.6-15ubuntu2.1",
        "2:2.6-15ubuntu2.2"
      ]
    }
  ],
  "aliases": [],
  "details": "The EAP-pwd implementation in hostapd (EAP server) before 2.8 and wpa_supplicant (EAP peer) before 2.8 does not validate fragmentation reassembly state properly for a case where an unexpected fragment could be received. This could result in process termination due to a NULL pointer dereference (denial of service). This affects eap_server/eap_server_pwd.c and eap_peer/eap_pwd.c.",
  "id": "UBUNTU-CVE-2019-11555",
  "modified": "2025-10-14T16:48:37Z",
  "published": "2019-04-26T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2019-11555"
    },
    {
      "type": "REPORT",
      "url": "https://w1.fi/security/2019-5/eap-pwd-message-reassembly-issue-with-unexpected-fragment.txt"
    },
    {
      "type": "REPORT",
      "url": "http://www.openwall.com/lists/oss-security/2019/04/26/1"
    },
    {
      "type": "REPORT",
      "url": "https://www.openwall.com/lists/oss-security/2019/04/18/6"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-3969-1"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-3969-2"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2019-11555"
    }
  ],
  "related": [
    "USN-3969-1",
    "USN-3969-2"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2019-11555"
  ]
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.


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.