Vulnerability-Lookup

Vulnerability from bitnami_vulndb

Published

2025-07-16 07:56

Modified

2025-11-06 13:25

Summary

Apache HTTP Server: mod_ssl TLS upgrade attack

Details

In some mod_ssl configurations on Apache HTTP Server versions through to 2.4.63, an HTTP desynchronisation attack allows a man-in-the-middle attacker to hijack an HTTP session via a TLS upgrade.

Only configurations using "SSLEngine optional" to enable TLS upgrades are affected. Users are recommended to upgrade to version 2.4.64, which removes support for TLS upgrade.

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Bitnami",
        "name": "apache",
        "purl": "pkg:bitnami/apache"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.4.64"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "severity": [
        {
          "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
          "type": "CVSS_V3"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-49812"
  ],
  "database_specific": {
    "cpes": [
      "cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*"
    ],
    "severity": "High"
  },
  "details": "In some mod_ssl configurations on Apache HTTP Server versions through to 2.4.63, an HTTP desynchronisation attack allows a man-in-the-middle attacker to hijack an HTTP session via a TLS upgrade.\n\nOnly configurations using \"SSLEngine optional\" to enable TLS upgrades are affected. Users are recommended to upgrade to version 2.4.64, which removes support for TLS upgrade.",
  "id": "BIT-apache-2025-49812",
  "modified": "2025-11-06T13:25:46.476Z",
  "published": "2025-07-16T07:56:35.377Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://httpd.apache.org/security/vulnerabilities_24.html"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-49812"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2025/07/09/3"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2025/07/10/2"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2025/07/10/9"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/08/msg00009.html"
    }
  ],
  "schema_version": "1.6.2",
  "summary": "Apache HTTP Server: mod_ssl TLS upgrade attack"
}

CVE-2025-49812 (GCVE-0-2025-49812)

Vulnerability from cvelistv5 – Published: 2025-07-10 16:58 – Updated: 2025-11-04 21:11

Title

Apache HTTP Server: mod_ssl TLS upgrade attack

Summary

In some mod_ssl configurations on Apache HTTP Server versions through to 2.4.63, an HTTP desynchronisation attack allows a man-in-the-middle attacker to hijack an HTTP session via a TLS upgrade. Only configurations using "SSLEngine optional" to enable TLS upgrades are affected. Users are recommended to upgrade to version 2.4.64, which removes support for TLS upgrade.

Severity ?

No CVSS data available.

CWE

CWE-287 - Improper Authentication

Assigner

apache

References

URL

Tags

https://httpd.apache.org/security/vulnerabilities…

vendor-advisory

Impacted products

	Vendor	Product	Version
	Apache Software Foundation	Apache HTTP Server	Affected: 0 , ≤ 2.4.63 (semver)

Credits

Robert Merget (Technology Innovation Institute) Nurullah Erinola (Ruhr University Bochum) Marcel Maehren (Ruhr University Bochum) Lukas Knittel (Ruhr University Bochum) Sven Hebrok (Paderborn University) Marcus Brinkmann (Ruhr University Bochum) Juraj Somorovsky (Paderborn University) Jörg Schwenk (Ruhr University Bochum)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "HIGH",
              "attackVector": "NETWORK",
              "availabilityImpact": "NONE",
              "baseScore": 7.4,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2025-49812",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-07-11T16:05:54.218961Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-07-15T19:56:14.709Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2025-11-04T21:11:18.699Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "https://lists.debian.org/debian-lts-announce/2025/08/msg00009.html"
          },
          {
            "url": "http://www.openwall.com/lists/oss-security/2025/07/09/3"
          },
          {
            "url": "http://www.openwall.com/lists/oss-security/2025/07/10/2"
          },
          {
            "url": "http://www.openwall.com/lists/oss-security/2025/07/10/9"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Apache HTTP Server",
          "vendor": "Apache Software Foundation",
          "versions": [
            {
              "lessThanOrEqual": "2.4.63",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Robert Merget (Technology Innovation Institute)"
        },
        {
          "lang": "en",
          "type": "finder",
          "value": "Nurullah Erinola (Ruhr University Bochum)"
        },
        {
          "lang": "en",
          "type": "finder",
          "value": "Marcel Maehren (Ruhr University Bochum)"
        },
        {
          "lang": "en",
          "type": "finder",
          "value": "Lukas Knittel (Ruhr University Bochum)"
        },
        {
          "lang": "en",
          "type": "finder",
          "value": "Sven Hebrok (Paderborn University)"
        },
        {
          "lang": "en",
          "type": "finder",
          "value": "Marcus Brinkmann (Ruhr University Bochum)"
        },
        {
          "lang": "en",
          "type": "finder",
          "value": "Juraj Somorovsky (Paderborn University)"
        },
        {
          "lang": "en",
          "type": "finder",
          "value": "J\u00f6rg Schwenk (Ruhr University Bochum)"
        }
      ],
      "descriptions": [
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          "lang": "en",
          "supportingMedia": [
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              "base64": false,
              "type": "text/html",
              "value": "In some mod_ssl configurations on Apache HTTP Server versions through to 2.4.63, an HTTP desynchronisation attack allows a man-in-the-middle attacker to hijack an HTTP session via a TLS upgrade.\u003cbr\u003e\u003cbr\u003eOnly configurations using \"SSLEngine optional\" to enable TLS upgrades are affected. Users are recommended to upgrade to version 2.4.64, which removes support for TLS upgrade."
            }
          ],
          "value": "In some mod_ssl configurations on Apache HTTP Server versions through to 2.4.63, an HTTP desynchronisation attack allows a man-in-the-middle attacker to hijack an HTTP session via a TLS upgrade.\n\nOnly configurations using \"SSLEngine optional\" to enable TLS upgrades are affected. Users are recommended to upgrade to version 2.4.64, which removes support for TLS upgrade."
        }
      ],
      "metrics": [
        {
          "other": {
            "content": {
              "text": "moderate"
            },
            "type": "Textual description of severity"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-287",
              "description": "CWE-287 Improper Authentication",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-07-10T16:58:23.943Z",
        "orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
        "shortName": "apache"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://httpd.apache.org/security/vulnerabilities_24.html"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "timeline": [
        {
          "lang": "en",
          "time": "2025-04-22T07:26:00.000Z",
          "value": "Report received"
        },
        {
          "lang": "en",
          "time": "2025-07-07T00:00:00.000Z",
          "value": "2.4.x revision 1927045"
        }
      ],
      "title": "Apache HTTP Server: mod_ssl TLS upgrade attack",
      "x_generator": {
        "engine": "Vulnogram 0.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
    "assignerShortName": "apache",
    "cveId": "CVE-2025-49812",
    "datePublished": "2025-07-10T16:58:23.943Z",
    "dateReserved": "2025-06-11T09:36:54.723Z",
    "dateUpdated": "2025-11-04T21:11:18.699Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date

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.

Action not permitted

Vulnerability from bitnami_vulndb

CVE-2025-49812 (GCVE-0-2025-49812)

Tags

Sightings

Nomenclature