CVE-2024-2511 (GCVE-0-2024-2511)
Vulnerability from cvelistv5
Published
2024-04-08 13:51
Modified
2025-11-03 21:54
Severity ?
CWE
  • CWE-1325 - Improperly Controlled Sequential Memory Allocation
Summary
Issue summary: Some non-default TLS server configurations can cause unbounded memory growth when processing TLSv1.3 sessions Impact summary: An attacker may exploit certain server configurations to trigger unbounded memory growth that would lead to a Denial of Service This problem can occur in TLSv1.3 if the non-default SSL_OP_NO_TICKET option is being used (but not if early_data support is also configured and the default anti-replay protection is in use). In this case, under certain conditions, the session cache can get into an incorrect state and it will fail to flush properly as it fills. The session cache will continue to grow in an unbounded manner. A malicious client could deliberately create the scenario for this failure to force a Denial of Service. It may also happen by accident in normal operation. This issue only affects TLS servers supporting TLSv1.3. It does not affect TLS clients. The FIPS modules in 3.2, 3.1 and 3.0 are not affected by this issue. OpenSSL 1.0.2 is also not affected by this issue.
References
Impacted products
Vendor Product Version
OpenSSL OpenSSL Version: 3.2.0   ≤
Version: 3.1.0   ≤
Version: 3.0.0   ≤
Version: 1.1.1   < 1.1.1y
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "HIGH",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 5.9,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2024-2511",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-04-09T15:14:41.481807Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-03-28T19:21:08.630Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2025-11-03T21:54:02.419Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "name": "OpenSSL Advisory",
            "tags": [
              "vendor-advisory",
              "x_transferred"
            ],
            "url": "https://www.openssl.org/news/secadv/20240408.txt"
          },
          {
            "name": "3.2.2 git commit",
            "tags": [
              "patch",
              "x_transferred"
            ],
            "url": "https://github.com/openssl/openssl/commit/e9d7083e241670332e0443da0f0d4ffb52829f08"
          },
          {
            "name": "3.1.6 git commit",
            "tags": [
              "patch",
              "x_transferred"
            ],
            "url": "https://github.com/openssl/openssl/commit/7e4d731b1c07201ad9374c1cd9ac5263bdf35bce"
          },
          {
            "name": "3.0.14 git commit",
            "tags": [
              "patch",
              "x_transferred"
            ],
            "url": "https://github.com/openssl/openssl/commit/b52867a9f618bb955bed2a3ce3db4d4f97ed8e5d"
          },
          {
            "name": "1.1.1y git commit",
            "tags": [
              "patch",
              "x_transferred"
            ],
            "url": "https://github.openssl.org/openssl/extended-releases/commit/5f8d25770ae6437db119dfc951e207271a326640"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2024/04/08/5"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://security.netapp.com/advisory/ntap-20240503-0013/"
          },
          {
            "url": "https://lists.debian.org/debian-lts-announce/2024/11/msg00000.html"
          },
          {
            "url": "https://lists.debian.org/debian-lts-announce/2024/10/msg00033.html"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "OpenSSL",
          "vendor": "OpenSSL",
          "versions": [
            {
              "lessThan": "3.2.2",
              "status": "affected",
              "version": "3.2.0",
              "versionType": "semver"
            },
            {
              "lessThan": "3.1.6",
              "status": "affected",
              "version": "3.1.0",
              "versionType": "semver"
            },
            {
              "lessThan": "3.0.14",
              "status": "affected",
              "version": "3.0.0",
              "versionType": "semver"
            },
            {
              "lessThan": "1.1.1y",
              "status": "affected",
              "version": "1.1.1",
              "versionType": "custom"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "user": "00000000-0000-4000-9000-000000000000",
          "value": "Manish Patidar (Hewlett Packard Enterprise)"
        },
        {
          "lang": "en",
          "type": "remediation developer",
          "user": "00000000-0000-4000-9000-000000000000",
          "value": "Matt Caswell"
        }
      ],
      "datePublic": "2024-04-08T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "Issue summary: Some non-default TLS server configurations can cause unbounded\u003cbr\u003ememory growth when processing TLSv1.3 sessions\u003cbr\u003e\u003cbr\u003eImpact summary: An attacker may exploit certain server configurations to trigger\u003cbr\u003eunbounded memory growth that would lead to a Denial of Service\u003cbr\u003e\u003cbr\u003eThis problem can occur in TLSv1.3 if the non-default SSL_OP_NO_TICKET option is\u003cbr\u003ebeing used (but not if early_data support is also configured and the default\u003cbr\u003eanti-replay protection is in use). In this case, under certain conditions, the\u003cbr\u003esession cache can get into an incorrect state and it will fail to flush properly\u003cbr\u003eas it fills. The session cache will continue to grow in an unbounded manner. A\u003cbr\u003emalicious client could deliberately create the scenario for this failure to\u003cbr\u003eforce a Denial of Service. It may also happen by accident in normal operation.\u003cbr\u003e\u003cbr\u003eThis issue only affects TLS servers supporting TLSv1.3. It does not affect TLS\u003cbr\u003eclients.\u003cbr\u003e\u003cbr\u003eThe FIPS modules in 3.2, 3.1 and 3.0 are not affected by this issue. OpenSSL\u003cbr\u003e1.0.2 is also not affected by this issue."
            }
          ],
          "value": "Issue summary: Some non-default TLS server configurations can cause unbounded\nmemory growth when processing TLSv1.3 sessions\n\nImpact summary: An attacker may exploit certain server configurations to trigger\nunbounded memory growth that would lead to a Denial of Service\n\nThis problem can occur in TLSv1.3 if the non-default SSL_OP_NO_TICKET option is\nbeing used (but not if early_data support is also configured and the default\nanti-replay protection is in use). In this case, under certain conditions, the\nsession cache can get into an incorrect state and it will fail to flush properly\nas it fills. The session cache will continue to grow in an unbounded manner. A\nmalicious client could deliberately create the scenario for this failure to\nforce a Denial of Service. It may also happen by accident in normal operation.\n\nThis issue only affects TLS servers supporting TLSv1.3. It does not affect TLS\nclients.\n\nThe FIPS modules in 3.2, 3.1 and 3.0 are not affected by this issue. OpenSSL\n1.0.2 is also not affected by this issue."
        }
      ],
      "metrics": [
        {
          "format": "other",
          "other": {
            "content": {
              "text": "Low"
            },
            "type": "https://www.openssl.org/policies/secpolicy.html"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-1325",
              "description": "CWE-1325 Improperly Controlled Sequential Memory Allocation",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2024-10-14T14:56:00.208Z",
        "orgId": "3a12439a-ef3a-4c79-92e6-6081a721f1e5",
        "shortName": "openssl"
      },
      "references": [
        {
          "name": "OpenSSL Advisory",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://www.openssl.org/news/secadv/20240408.txt"
        },
        {
          "name": "3.2.2 git commit",
          "tags": [
            "patch"
          ],
          "url": "https://github.com/openssl/openssl/commit/e9d7083e241670332e0443da0f0d4ffb52829f08"
        },
        {
          "name": "3.1.6 git commit",
          "tags": [
            "patch"
          ],
          "url": "https://github.com/openssl/openssl/commit/7e4d731b1c07201ad9374c1cd9ac5263bdf35bce"
        },
        {
          "name": "3.0.14 git commit",
          "tags": [
            "patch"
          ],
          "url": "https://github.com/openssl/openssl/commit/b52867a9f618bb955bed2a3ce3db4d4f97ed8e5d"
        },
        {
          "name": "1.1.1y git commit",
          "tags": [
            "patch"
          ],
          "url": "https://github.openssl.org/openssl/extended-releases/commit/5f8d25770ae6437db119dfc951e207271a326640"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Unbounded memory growth with session handling in TLSv1.3",
      "x_generator": {
        "engine": "Vulnogram 0.1.0-dev"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "3a12439a-ef3a-4c79-92e6-6081a721f1e5",
    "assignerShortName": "openssl",
    "cveId": "CVE-2024-2511",
    "datePublished": "2024-04-08T13:51:12.349Z",
    "dateReserved": "2024-03-15T15:33:52.037Z",
    "dateUpdated": "2025-11-03T21:54:02.419Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://www.openssl.org/news/secadv/20240408.txt\", \"name\": \"OpenSSL Advisory\", \"tags\": [\"vendor-advisory\", \"x_transferred\"]}, {\"url\": \"https://github.com/openssl/openssl/commit/e9d7083e241670332e0443da0f0d4ffb52829f08\", \"name\": \"3.2.2 git commit\", \"tags\": [\"patch\", \"x_transferred\"]}, {\"url\": \"https://github.com/openssl/openssl/commit/7e4d731b1c07201ad9374c1cd9ac5263bdf35bce\", \"name\": \"3.1.6 git commit\", \"tags\": [\"patch\", \"x_transferred\"]}, {\"url\": \"https://github.com/openssl/openssl/commit/b52867a9f618bb955bed2a3ce3db4d4f97ed8e5d\", \"name\": \"3.0.14 git commit\", \"tags\": [\"patch\", \"x_transferred\"]}, {\"url\": \"https://github.openssl.org/openssl/extended-releases/commit/5f8d25770ae6437db119dfc951e207271a326640\", \"name\": \"1.1.1y git commit\", \"tags\": [\"patch\", \"x_transferred\"]}, {\"url\": \"http://www.openwall.com/lists/oss-security/2024/04/08/5\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://security.netapp.com/advisory/ntap-20240503-0013/\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://lists.debian.org/debian-lts-announce/2024/11/msg00000.html\"}, {\"url\": \"https://lists.debian.org/debian-lts-announce/2024/10/msg00033.html\"}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2025-11-03T21:54:02.419Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 5.9, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"HIGH\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"NONE\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-2511\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-04-09T15:14:41.481807Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-05-23T19:01:22.616Z\"}}], \"cna\": {\"title\": \"Unbounded memory growth with session handling in TLSv1.3\", \"source\": {\"discovery\": \"UNKNOWN\"}, \"credits\": [{\"lang\": \"en\", \"type\": \"finder\", \"user\": \"00000000-0000-4000-9000-000000000000\", \"value\": \"Manish Patidar (Hewlett Packard Enterprise)\"}, {\"lang\": \"en\", \"type\": \"remediation developer\", \"user\": \"00000000-0000-4000-9000-000000000000\", \"value\": \"Matt Caswell\"}], \"metrics\": [{\"other\": {\"type\": \"https://www.openssl.org/policies/secpolicy.html\", \"content\": {\"text\": \"Low\"}}, \"format\": \"other\"}], \"affected\": [{\"vendor\": \"OpenSSL\", \"product\": \"OpenSSL\", \"versions\": [{\"status\": \"affected\", \"version\": \"3.2.0\", \"lessThan\": \"3.2.2\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"3.1.0\", \"lessThan\": \"3.1.6\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"3.0.0\", \"lessThan\": \"3.0.14\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"1.1.1\", \"lessThan\": \"1.1.1y\", \"versionType\": \"custom\"}], \"defaultStatus\": \"unaffected\"}], \"datePublic\": \"2024-04-08T00:00:00.000Z\", \"references\": [{\"url\": \"https://www.openssl.org/news/secadv/20240408.txt\", \"name\": \"OpenSSL Advisory\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"https://github.com/openssl/openssl/commit/e9d7083e241670332e0443da0f0d4ffb52829f08\", \"name\": \"3.2.2 git commit\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.com/openssl/openssl/commit/7e4d731b1c07201ad9374c1cd9ac5263bdf35bce\", \"name\": \"3.1.6 git commit\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.com/openssl/openssl/commit/b52867a9f618bb955bed2a3ce3db4d4f97ed8e5d\", \"name\": \"3.0.14 git commit\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.openssl.org/openssl/extended-releases/commit/5f8d25770ae6437db119dfc951e207271a326640\", \"name\": \"1.1.1y git commit\", \"tags\": [\"patch\"]}], \"x_generator\": {\"engine\": \"Vulnogram 0.1.0-dev\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"Issue summary: Some non-default TLS server configurations can cause unbounded\\nmemory growth when processing TLSv1.3 sessions\\n\\nImpact summary: An attacker may exploit certain server configurations to trigger\\nunbounded memory growth that would lead to a Denial of Service\\n\\nThis problem can occur in TLSv1.3 if the non-default SSL_OP_NO_TICKET option is\\nbeing used (but not if early_data support is also configured and the default\\nanti-replay protection is in use). In this case, under certain conditions, the\\nsession cache can get into an incorrect state and it will fail to flush properly\\nas it fills. The session cache will continue to grow in an unbounded manner. A\\nmalicious client could deliberately create the scenario for this failure to\\nforce a Denial of Service. It may also happen by accident in normal operation.\\n\\nThis issue only affects TLS servers supporting TLSv1.3. It does not affect TLS\\nclients.\\n\\nThe FIPS modules in 3.2, 3.1 and 3.0 are not affected by this issue. OpenSSL\\n1.0.2 is also not affected by this issue.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"Issue summary: Some non-default TLS server configurations can cause unbounded\u003cbr\u003ememory growth when processing TLSv1.3 sessions\u003cbr\u003e\u003cbr\u003eImpact summary: An attacker may exploit certain server configurations to trigger\u003cbr\u003eunbounded memory growth that would lead to a Denial of Service\u003cbr\u003e\u003cbr\u003eThis problem can occur in TLSv1.3 if the non-default SSL_OP_NO_TICKET option is\u003cbr\u003ebeing used (but not if early_data support is also configured and the default\u003cbr\u003eanti-replay protection is in use). In this case, under certain conditions, the\u003cbr\u003esession cache can get into an incorrect state and it will fail to flush properly\u003cbr\u003eas it fills. The session cache will continue to grow in an unbounded manner. A\u003cbr\u003emalicious client could deliberately create the scenario for this failure to\u003cbr\u003eforce a Denial of Service. It may also happen by accident in normal operation.\u003cbr\u003e\u003cbr\u003eThis issue only affects TLS servers supporting TLSv1.3. It does not affect TLS\u003cbr\u003eclients.\u003cbr\u003e\u003cbr\u003eThe FIPS modules in 3.2, 3.1 and 3.0 are not affected by this issue. OpenSSL\u003cbr\u003e1.0.2 is also not affected by this issue.\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-1325\", \"description\": \"CWE-1325 Improperly Controlled Sequential Memory Allocation\"}]}], \"providerMetadata\": {\"orgId\": \"3a12439a-ef3a-4c79-92e6-6081a721f1e5\", \"shortName\": \"openssl\", \"dateUpdated\": \"2024-10-14T14:56:00.208Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-2511\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-11-03T21:54:02.419Z\", \"dateReserved\": \"2024-03-15T15:33:52.037Z\", \"assignerOrgId\": \"3a12439a-ef3a-4c79-92e6-6081a721f1e5\", \"datePublished\": \"2024-04-08T13:51:12.349Z\", \"assignerShortName\": \"openssl\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.