Vulnerability-Lookup

ubuntu-cve-2025-4476

Vulnerability from osv_ubuntu

Published

2025-05-16 18:16

Modified

2026-04-22 07:53

Summary

Details

A denial-of-service vulnerability has been identified in the libsoup HTTP client library. This flaw can be triggered when a libsoup client receives a 401 (Unauthorized) HTTP response containing a specifically crafted domain parameter within the WWW-Authenticate header. Processing this malformed header can lead to a crash of the client application using libsoup. An attacker could exploit this by setting up a malicious HTTP server. If a user's application using the vulnerable libsoup library connects to this malicious server, it could result in a denial-of-service. Successful exploitation requires tricking a user's client application into connecting to the attacker's malicious server.

Severity

4.3 (Medium)


                    
                      CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2025-4476	REPORT
	https://www.cve.org/CVERecord?id=CVE-2025-4476	REPORT
	https://gitlab.gnome.org/GNOME/libsoup/-/merge_re…	REPORT
	https://access.redhat.com/security/cve/CVE-2025-4476	REPORT
	https://ubuntu.com/security/notices/USN-7543-1	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "gir1.2-soup-2.4",
            "binary_version": "2.52.2-1ubuntu0.3+esm3"
          },
          {
            "binary_name": "libsoup-gnome2.4-1",
            "binary_version": "2.52.2-1ubuntu0.3+esm3"
          },
          {
            "binary_name": "libsoup2.4-1",
            "binary_version": "2.52.2-1ubuntu0.3+esm3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "libsoup2.4",
        "purl": "pkg:deb/ubuntu/libsoup2.4@2.52.2-1ubuntu0.3+esm3?arch=source\u0026distro=esm-infra/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.52.2-1ubuntu0.3+esm3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.50.0-2debian1",
        "2.52.1-1",
        "2.52.2-1",
        "2.52.2-1ubuntu0.1",
        "2.52.2-1ubuntu0.2",
        "2.52.2-1ubuntu0.3",
        "2.52.2-1ubuntu0.3+esm1",
        "2.52.2-1ubuntu0.3+esm2"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "gir1.2-soup-2.4",
            "binary_version": "2.62.1-1ubuntu0.4+esm4"
          },
          {
            "binary_name": "libsoup-gnome2.4-1",
            "binary_version": "2.62.1-1ubuntu0.4+esm4"
          },
          {
            "binary_name": "libsoup2.4-1",
            "binary_version": "2.62.1-1ubuntu0.4+esm4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "libsoup2.4",
        "purl": "pkg:deb/ubuntu/libsoup2.4@2.62.1-1ubuntu0.4+esm4?arch=source\u0026distro=esm-infra/bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.62.1-1ubuntu0.4+esm4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.60.1-1",
        "2.60.2-1",
        "2.60.2-2",
        "2.60.3-1",
        "2.61.90-1",
        "2.62.0-1",
        "2.62.1-1",
        "2.62.1-1ubuntu0.1",
        "2.62.1-1ubuntu0.3",
        "2.62.1-1ubuntu0.4",
        "2.62.1-1ubuntu0.4+esm1",
        "2.62.1-1ubuntu0.4+esm2",
        "2.62.1-1ubuntu0.4+esm3"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "gir1.2-soup-2.4",
            "binary_version": "2.70.0-1ubuntu0.5"
          },
          {
            "binary_name": "libsoup-gnome2.4-1",
            "binary_version": "2.70.0-1ubuntu0.5"
          },
          {
            "binary_name": "libsoup2.4-1",
            "binary_version": "2.70.0-1ubuntu0.5"
          },
          {
            "binary_name": "libsoup2.4-tests",
            "binary_version": "2.70.0-1ubuntu0.5"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "libsoup2.4",
        "purl": "pkg:deb/ubuntu/libsoup2.4@2.70.0-1ubuntu0.5?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.70.0-1ubuntu0.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.68.2-0ubuntu1",
        "2.68.2-1",
        "2.68.2-2",
        "2.68.2-2build2",
        "2.69.90-1",
        "2.70.0-1",
        "2.70.0-1ubuntu0.1",
        "2.70.0-1ubuntu0.2",
        "2.70.0-1ubuntu0.3",
        "2.70.0-1ubuntu0.4"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "gir1.2-soup-2.4",
            "binary_version": "2.74.2-3ubuntu0.5"
          },
          {
            "binary_name": "libsoup-gnome2.4-1",
            "binary_version": "2.74.2-3ubuntu0.5"
          },
          {
            "binary_name": "libsoup2.4-1",
            "binary_version": "2.74.2-3ubuntu0.5"
          },
          {
            "binary_name": "libsoup2.4-common",
            "binary_version": "2.74.2-3ubuntu0.5"
          },
          {
            "binary_name": "libsoup2.4-tests",
            "binary_version": "2.74.2-3ubuntu0.5"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "libsoup2.4",
        "purl": "pkg:deb/ubuntu/libsoup2.4@2.74.2-3ubuntu0.5?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.74.2-3ubuntu0.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.72.0-3ubuntu3",
        "2.74.1-1",
        "2.74.2-2",
        "2.74.2-3",
        "2.74.2-3ubuntu0.1",
        "2.74.2-3ubuntu0.2",
        "2.74.2-3ubuntu0.3",
        "2.74.2-3ubuntu0.4"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "gir1.2-soup-3.0",
            "binary_version": "3.0.7-0ubuntu1+esm4"
          },
          {
            "binary_name": "libsoup-3.0-0",
            "binary_version": "3.0.7-0ubuntu1+esm4"
          },
          {
            "binary_name": "libsoup-3.0-common",
            "binary_version": "3.0.7-0ubuntu1+esm4"
          },
          {
            "binary_name": "libsoup-3.0-tests",
            "binary_version": "3.0.7-0ubuntu1+esm4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:22.04:LTS",
        "name": "libsoup3",
        "purl": "pkg:deb/ubuntu/libsoup3@3.0.7-0ubuntu1+esm4?arch=source\u0026distro=esm-apps/jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.0.7-0ubuntu1+esm4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.0.4-2",
        "3.0.4-3",
        "3.0.5-1",
        "3.0.7-0ubuntu1",
        "3.0.7-0ubuntu1+esm1",
        "3.0.7-0ubuntu1+esm2",
        "3.0.7-0ubuntu1+esm3"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "gir1.2-soup-2.4",
            "binary_version": "2.74.3-6ubuntu1.5"
          },
          {
            "binary_name": "libsoup-2.4-1",
            "binary_version": "2.74.3-6ubuntu1.5"
          },
          {
            "binary_name": "libsoup-gnome-2.4-1",
            "binary_version": "2.74.3-6ubuntu1.5"
          },
          {
            "binary_name": "libsoup2.4-common",
            "binary_version": "2.74.3-6ubuntu1.5"
          },
          {
            "binary_name": "libsoup2.4-tests",
            "binary_version": "2.74.3-6ubuntu1.5"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "libsoup2.4",
        "purl": "pkg:deb/ubuntu/libsoup2.4@2.74.3-6ubuntu1.5?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.74.3-6ubuntu1.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.74.3-1",
        "2.74.3-2",
        "2.74.3-3",
        "2.74.3-6",
        "2.74.3-6build1",
        "2.74.3-6ubuntu1",
        "2.74.3-6ubuntu1.1",
        "2.74.3-6ubuntu1.2",
        "2.74.3-6ubuntu1.3",
        "2.74.3-6ubuntu1.4"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "gir1.2-soup-3.0",
            "binary_version": "3.4.4-5ubuntu0.4"
          },
          {
            "binary_name": "libsoup-3.0-0",
            "binary_version": "3.4.4-5ubuntu0.4"
          },
          {
            "binary_name": "libsoup-3.0-common",
            "binary_version": "3.4.4-5ubuntu0.4"
          },
          {
            "binary_name": "libsoup-3.0-tests",
            "binary_version": "3.4.4-5ubuntu0.4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "libsoup3",
        "purl": "pkg:deb/ubuntu/libsoup3@3.4.4-5ubuntu0.4?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.4.4-5ubuntu0.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.4.2-4",
        "3.4.4-1",
        "3.4.4-2",
        "3.4.4-4",
        "3.4.4-5",
        "3.4.4-5build1",
        "3.4.4-5build2",
        "3.4.4-5ubuntu0.1",
        "3.4.4-5ubuntu0.2",
        "3.4.4-5ubuntu0.3"
      ]
    }
  ],
  "aliases": [],
  "details": "A denial-of-service vulnerability has been identified in the libsoup HTTP client library. This flaw can be triggered when a libsoup client receives a 401 (Unauthorized) HTTP response containing a specifically crafted domain parameter within the WWW-Authenticate header. Processing this malformed header can lead to a crash of the client application using libsoup. An attacker could exploit this by setting up a malicious HTTP server. If a user\u0027s application using the vulnerable libsoup library connects to this malicious server, it could result in a denial-of-service. Successful exploitation requires tricking a user\u0027s client application into connecting to the attacker\u0027s malicious server.",
  "id": "UBUNTU-CVE-2025-4476",
  "modified": "2026-04-22T07:53:18Z",
  "published": "2025-05-16T18:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2025-4476"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2025-4476"
    },
    {
      "type": "REPORT",
      "url": "https://gitlab.gnome.org/GNOME/libsoup/-/merge_requests/457"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2025-4476"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-7543-1"
    }
  ],
  "related": [
    "USN-7543-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2025-4476"
  ]
}

CVE-2025-4476 (GCVE-0-2025-4476)

Vulnerability from cvelistv5 – Published: 2025-05-16 17:56 – Updated: 2026-06-30 10:40

Title

Libsoup: null pointer dereference in libsoup may lead to denial of service

Summary

Severity

4.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-05-06 15:04 UTC

CWE

CWE-476 - NULL Pointer Dereference

Assigner

redhat redhat root

References

4 references

URL	Tags
https://access.redhat.com/security/cve/CVE-2025-4476	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2366513	issue-trackingx_refsource_REDHAT
https://gitlab.gnome.org/GNOME/libsoup/-/issues/440
https://gitlab.gnome.org/GNOME/libsoup/-/work_items/440	exploit

Impacted products

6 products

Vendor	Product	Version
		Affected: 0 , < 3.6.6 (semver)
Red Hat	Red Hat Enterprise Linux 10	cpe:/o:redhat:enterprise_linux:10
Red Hat	Red Hat Enterprise Linux 6	cpe:/o:redhat:enterprise_linux:6
Red Hat	Red Hat Enterprise Linux 7	cpe:/o:redhat:enterprise_linux:7
Red Hat	Red Hat Enterprise Linux 8	cpe:/o:redhat:enterprise_linux:8
Red Hat	Red Hat Enterprise Linux 9	cpe:/o:redhat:enterprise_linux:9

Date Public

2025-05-08 00:00

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-4476",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-06T15:04:45.602956Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-06T15:05:02.263Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "exploit"
            ],
            "url": "https://gitlab.gnome.org/GNOME/libsoup/-/work_items/440"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://gitlab.gnome.org/GNOME/libsoup",
          "defaultStatus": "unaffected",
          "packageName": "libsoup",
          "versions": [
            {
              "lessThan": "3.6.6",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:10"
          ],
          "defaultStatus": "affected",
          "packageName": "libsoup3",
          "product": "Red Hat Enterprise Linux 10",
          "vendor": "Red Hat"
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:6"
          ],
          "defaultStatus": "unknown",
          "packageName": "libsoup",
          "product": "Red Hat Enterprise Linux 6",
          "vendor": "Red Hat"
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:7"
          ],
          "defaultStatus": "unknown",
          "packageName": "libsoup",
          "product": "Red Hat Enterprise Linux 7",
          "vendor": "Red Hat"
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:8"
          ],
          "defaultStatus": "affected",
          "packageName": "libsoup",
          "product": "Red Hat Enterprise Linux 8",
          "vendor": "Red Hat"
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:9"
          ],
          "defaultStatus": "affected",
          "packageName": "libsoup",
          "product": "Red Hat Enterprise Linux 9",
          "vendor": "Red Hat"
        }
      ],
      "datePublic": "2025-05-08T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "A denial-of-service vulnerability has been identified in the libsoup HTTP client library. This flaw can be triggered when a libsoup client receives a 401 (Unauthorized) HTTP response containing a specifically crafted domain parameter within the WWW-Authenticate header. Processing this malformed header can lead to a crash of the client application using libsoup. An attacker could exploit this by setting up a malicious HTTP server. If a user\u0027s application using the vulnerable libsoup library connects to this malicious server, it could result in a denial-of-service. Successful exploitation requires tricking a user\u0027s client application into connecting to the attacker\u0027s malicious server."
        }
      ],
      "metrics": [
        {
          "other": {
            "content": {
              "namespace": "https://access.redhat.com/security/updates/classification/",
              "value": "Low"
            },
            "type": "Red Hat severity rating"
          }
        },
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 4.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L",
            "version": "3.1"
          },
          "format": "CVSS"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-476",
              "description": "NULL Pointer Dereference",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-30T10:40:23.378Z",
        "orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
        "shortName": "redhat"
      },
      "references": [
        {
          "tags": [
            "vdb-entry",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/security/cve/CVE-2025-4476"
        },
        {
          "name": "RHBZ#2366513",
          "tags": [
            "issue-tracking",
            "x_refsource_REDHAT"
          ],
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2366513"
        },
        {
          "url": "https://gitlab.gnome.org/GNOME/libsoup/-/issues/440"
        }
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2025-05-15T14:21:35.587Z",
          "value": "Reported to Red Hat."
        },
        {
          "lang": "en",
          "time": "2025-05-08T00:00:00.000Z",
          "value": "Made public."
        }
      ],
      "title": "Libsoup: null pointer dereference in libsoup may lead to denial of service",
      "workarounds": [
        {
          "lang": "en",
          "value": "To mitigate the risk posed by this libsoup vulnerability, Red Hat strongly advises against connecting client applications relying on the libsoup library to untrusted HTTP servers until systems can be updated to a version of libsoup that includes the fix for this specific flaw. This precaution will help prevent potential denial-of-service scenarios within user sessions."
        }
      ],
      "x_generator": {
        "engine": "cvelib 1.8.0"
      },
      "x_redhatCweChain": "CWE-476: NULL Pointer Dereference"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
    "assignerShortName": "redhat",
    "cveId": "CVE-2025-4476",
    "datePublished": "2025-05-16T17:56:58.302Z",
    "dateReserved": "2025-05-08T21:17:08.702Z",
    "dateUpdated": "2026-06-30T10:40:23.378Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

usn-7543-1

Vulnerability from osv_ubuntu

Published

2025-05-28 14:27

Modified

2026-06-25 10:46

Summary

libsoup3, libsoup2.4 vulnerabilities

Details

Jan Różański discovered that libsoup incorrectly handled certain headers when sending HTTP/2 requests over TLS. An attacker could possibly use this issue to cause a denial of service. This issue only affected libsoup3 in Ubuntu 24.04 LTS, Ubuntu 24.10, and Ubuntu 25.04. (CVE-2025-32908)

Jan Różański discovered that libsoup incorrectly parsed certain response headers. An attacker could possibly use this issue to cause a denial of service. (CVE-2025-4476)

References

URL

Type

	https://ubuntu.com/security/notices/USN-7543-1	ADVISORY
	https://ubuntu.com/security/CVE-2025-4476	REPORT
	https://ubuntu.com/security/CVE-2025-32908	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2025-4476",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:Pro:16.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "gir1.2-soup-2.4",
            "binary_version": "2.52.2-1ubuntu0.3+esm3"
          },
          {
            "binary_name": "libsoup-gnome2.4-1",
            "binary_version": "2.52.2-1ubuntu0.3+esm3"
          },
          {
            "binary_name": "libsoup2.4-1",
            "binary_version": "2.52.2-1ubuntu0.3+esm3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "libsoup2.4",
        "purl": "pkg:deb/ubuntu/libsoup2.4@2.52.2-1ubuntu0.3+esm3?arch=source\u0026distro=esm-infra/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.52.2-1ubuntu0.3+esm3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.50.0-2debian1",
        "2.52.1-1",
        "2.52.2-1",
        "2.52.2-1ubuntu0.1",
        "2.52.2-1ubuntu0.2",
        "2.52.2-1ubuntu0.3",
        "2.52.2-1ubuntu0.3+esm1",
        "2.52.2-1ubuntu0.3+esm2"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2025-4476",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:Pro:18.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "gir1.2-soup-2.4",
            "binary_version": "2.62.1-1ubuntu0.4+esm4"
          },
          {
            "binary_name": "libsoup-gnome2.4-1",
            "binary_version": "2.62.1-1ubuntu0.4+esm4"
          },
          {
            "binary_name": "libsoup2.4-1",
            "binary_version": "2.62.1-1ubuntu0.4+esm4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "libsoup2.4",
        "purl": "pkg:deb/ubuntu/libsoup2.4@2.62.1-1ubuntu0.4+esm4?arch=source\u0026distro=esm-infra/bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.62.1-1ubuntu0.4+esm4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.60.1-1",
        "2.60.2-1",
        "2.60.2-2",
        "2.60.3-1",
        "2.61.90-1",
        "2.62.0-1",
        "2.62.1-1",
        "2.62.1-1ubuntu0.1",
        "2.62.1-1ubuntu0.3",
        "2.62.1-1ubuntu0.4",
        "2.62.1-1ubuntu0.4+esm1",
        "2.62.1-1ubuntu0.4+esm2",
        "2.62.1-1ubuntu0.4+esm3"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2025-4476",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:20.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "gir1.2-soup-2.4",
            "binary_version": "2.70.0-1ubuntu0.5"
          },
          {
            "binary_name": "libsoup-gnome2.4-1",
            "binary_version": "2.70.0-1ubuntu0.5"
          },
          {
            "binary_name": "libsoup2.4-1",
            "binary_version": "2.70.0-1ubuntu0.5"
          },
          {
            "binary_name": "libsoup2.4-tests",
            "binary_version": "2.70.0-1ubuntu0.5"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "libsoup2.4",
        "purl": "pkg:deb/ubuntu/libsoup2.4@2.70.0-1ubuntu0.5?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.70.0-1ubuntu0.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.68.2-0ubuntu1",
        "2.68.2-1",
        "2.68.2-2",
        "2.68.2-2build2",
        "2.69.90-1",
        "2.70.0-1",
        "2.70.0-1ubuntu0.1",
        "2.70.0-1ubuntu0.2",
        "2.70.0-1ubuntu0.3",
        "2.70.0-1ubuntu0.4"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2025-4476",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:22.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "gir1.2-soup-2.4",
            "binary_version": "2.74.2-3ubuntu0.5"
          },
          {
            "binary_name": "libsoup-gnome2.4-1",
            "binary_version": "2.74.2-3ubuntu0.5"
          },
          {
            "binary_name": "libsoup2.4-1",
            "binary_version": "2.74.2-3ubuntu0.5"
          },
          {
            "binary_name": "libsoup2.4-common",
            "binary_version": "2.74.2-3ubuntu0.5"
          },
          {
            "binary_name": "libsoup2.4-tests",
            "binary_version": "2.74.2-3ubuntu0.5"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "libsoup2.4",
        "purl": "pkg:deb/ubuntu/libsoup2.4@2.74.2-3ubuntu0.5?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.74.2-3ubuntu0.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.72.0-3ubuntu3",
        "2.74.1-1",
        "2.74.2-2",
        "2.74.2-3",
        "2.74.2-3ubuntu0.1",
        "2.74.2-3ubuntu0.2",
        "2.74.2-3ubuntu0.3",
        "2.74.2-3ubuntu0.4"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2025-4476",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:Pro:22.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "gir1.2-soup-3.0",
            "binary_version": "3.0.7-0ubuntu1+esm4"
          },
          {
            "binary_name": "libsoup-3.0-0",
            "binary_version": "3.0.7-0ubuntu1+esm4"
          },
          {
            "binary_name": "libsoup-3.0-common",
            "binary_version": "3.0.7-0ubuntu1+esm4"
          },
          {
            "binary_name": "libsoup-3.0-tests",
            "binary_version": "3.0.7-0ubuntu1+esm4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:22.04:LTS",
        "name": "libsoup3",
        "purl": "pkg:deb/ubuntu/libsoup3@3.0.7-0ubuntu1+esm4?arch=source\u0026distro=esm-apps/jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.0.7-0ubuntu1+esm4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.0.4-2",
        "3.0.4-3",
        "3.0.5-1",
        "3.0.7-0ubuntu1",
        "3.0.7-0ubuntu1+esm1",
        "3.0.7-0ubuntu1+esm2",
        "3.0.7-0ubuntu1+esm3"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2025-4476",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2025-32908",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:24.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "gir1.2-soup-2.4",
            "binary_version": "2.74.3-6ubuntu1.5"
          },
          {
            "binary_name": "libsoup-2.4-1",
            "binary_version": "2.74.3-6ubuntu1.5"
          },
          {
            "binary_name": "libsoup-gnome-2.4-1",
            "binary_version": "2.74.3-6ubuntu1.5"
          },
          {
            "binary_name": "libsoup2.4-common",
            "binary_version": "2.74.3-6ubuntu1.5"
          },
          {
            "binary_name": "libsoup2.4-tests",
            "binary_version": "2.74.3-6ubuntu1.5"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "libsoup2.4",
        "purl": "pkg:deb/ubuntu/libsoup2.4@2.74.3-6ubuntu1.5?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.74.3-6ubuntu1.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.74.3-1",
        "2.74.3-2",
        "2.74.3-3",
        "2.74.3-6",
        "2.74.3-6build1",
        "2.74.3-6ubuntu1",
        "2.74.3-6ubuntu1.1",
        "2.74.3-6ubuntu1.2",
        "2.74.3-6ubuntu1.3",
        "2.74.3-6ubuntu1.4"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2025-4476",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2025-32908",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:24.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "gir1.2-soup-3.0",
            "binary_version": "3.4.4-5ubuntu0.4"
          },
          {
            "binary_name": "libsoup-3.0-0",
            "binary_version": "3.4.4-5ubuntu0.4"
          },
          {
            "binary_name": "libsoup-3.0-common",
            "binary_version": "3.4.4-5ubuntu0.4"
          },
          {
            "binary_name": "libsoup-3.0-tests",
            "binary_version": "3.4.4-5ubuntu0.4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "libsoup3",
        "purl": "pkg:deb/ubuntu/libsoup3@3.4.4-5ubuntu0.4?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.4.4-5ubuntu0.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.4.2-4",
        "3.4.4-1",
        "3.4.4-2",
        "3.4.4-4",
        "3.4.4-5",
        "3.4.4-5build1",
        "3.4.4-5build2",
        "3.4.4-5ubuntu0.1",
        "3.4.4-5ubuntu0.2",
        "3.4.4-5ubuntu0.3"
      ]
    }
  ],
  "aliases": [],
  "details": "Jan R\u00f3\u017ca\u0144ski discovered that libsoup incorrectly handled certain headers\nwhen sending HTTP/2 requests over TLS. An attacker could possibly use this\nissue to cause a denial of service. This issue only affected libsoup3 in\nUbuntu 24.04 LTS, Ubuntu 24.10, and Ubuntu 25.04. (CVE-2025-32908)\n\nJan R\u00f3\u017ca\u0144ski discovered that libsoup incorrectly parsed certain response\nheaders. An attacker could possibly use this issue to cause a denial of\nservice. (CVE-2025-4476)",
  "id": "USN-7543-1",
  "modified": "2026-06-25T10:46:50Z",
  "published": "2025-05-28T14:27:53Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-7543-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2025-4476"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2025-32908"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "libsoup3, libsoup2.4 vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2025-4476",
    "UBUNTU-CVE-2025-32908"
  ]
}

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

ubuntu-cve-2025-4476

Vulnerability from osv_ubuntu

CVE-2025-4476 (GCVE-0-2025-4476)

usn-7543-1

Vulnerability from osv_ubuntu

Tags

Sightings

Nomenclature

Related by attack behaviour