CVE-2024-9681 (GCVE-0-2024-9681)

Vulnerability from cvelistv5 – Published: 2024-11-06 07:47 – Updated: 2025-11-03 20:56
VLAI
Title
HSTS subdomain overwrites parent cache entry
Summary
When curl is asked to use HSTS, the expiry time for a subdomain might overwrite a parent domain's cache entry, making it end sooner or later than otherwise intended. This affects curl using applications that enable HSTS and use URLs with the insecure `HTTP://` scheme and perform transfers with hosts like `x.example.com` as well as `example.com` where the first host is a subdomain of the second host. (The HSTS cache either needs to have been populated manually or there needs to have been previous HTTPS accesses done as the cache needs to have entries for the domains involved to trigger this problem.) When `x.example.com` responds with `Strict-Transport-Security:` headers, this bug can make the subdomain's expiry timeout *bleed over* and get set for the parent domain `example.com` in curl's HSTS cache. The result of a triggered bug is that HTTP accesses to `example.com` get converted to HTTPS for a different period of time than what was asked for by the origin server. If `example.com` for example stops supporting HTTPS at its expiry time, curl might then fail to access `http://example.com` until the (wrongly set) timeout expires. This bug can also expire the parent's entry *earlier*, thus making curl inadvertently switch back to insecure HTTP earlier than otherwise intended.
Severity
5.9 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
CWE
Assigner
References
Impacted products
Vendor Product Version
curl curl Affected: 8.10.1 , ≤ 8.10.1 (semver)
Affected: 8.10.0 , ≤ 8.10.0 (semver)
Affected: 8.9.1 , ≤ 8.9.1 (semver)
Affected: 8.9.0 , ≤ 8.9.0 (semver)
Affected: 8.8.0 , ≤ 8.8.0 (semver)
Affected: 8.7.1 , ≤ 8.7.1 (semver)
Affected: 8.7.0 , ≤ 8.7.0 (semver)
Affected: 8.6.0 , ≤ 8.6.0 (semver)
Affected: 8.5.0 , ≤ 8.5.0 (semver)
Affected: 8.4.0 , ≤ 8.4.0 (semver)
Affected: 8.3.0 , ≤ 8.3.0 (semver)
Affected: 8.2.1 , ≤ 8.2.1 (semver)
Affected: 8.2.0 , ≤ 8.2.0 (semver)
Affected: 8.1.2 , ≤ 8.1.2 (semver)
Affected: 8.1.1 , ≤ 8.1.1 (semver)
Affected: 8.1.0 , ≤ 8.1.0 (semver)
Affected: 8.0.1 , ≤ 8.0.1 (semver)
Affected: 8.0.0 , ≤ 8.0.0 (semver)
Affected: 7.88.1 , ≤ 7.88.1 (semver)
Affected: 7.88.0 , ≤ 7.88.0 (semver)
Affected: 7.87.0 , ≤ 7.87.0 (semver)
Affected: 7.86.0 , ≤ 7.86.0 (semver)
Affected: 7.85.0 , ≤ 7.85.0 (semver)
Affected: 7.84.0 , ≤ 7.84.0 (semver)
Affected: 7.83.1 , ≤ 7.83.1 (semver)
Affected: 7.83.0 , ≤ 7.83.0 (semver)
Affected: 7.82.0 , ≤ 7.82.0 (semver)
Affected: 7.81.0 , ≤ 7.81.0 (semver)
Affected: 7.80.0 , ≤ 7.80.0 (semver)
Affected: 7.79.1 , ≤ 7.79.1 (semver)
Affected: 7.79.0 , ≤ 7.79.0 (semver)
Affected: 7.78.0 , ≤ 7.78.0 (semver)
Affected: 7.77.0 , ≤ 7.77.0 (semver)
Affected: 7.76.1 , ≤ 7.76.1 (semver)
Affected: 7.76.0 , ≤ 7.76.0 (semver)
Affected: 7.75.0 , ≤ 7.75.0 (semver)
Affected: 7.74.0 , ≤ 7.74.0 (semver)
Create a notification for this product.
Credits
newfunction Daniel Stenberg
Show details on NVD website
To clipboard 

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      "descriptions": "[{\"lang\": \"en\", \"value\": \"When curl is asked to use HSTS, the expiry time for a subdomain might\\noverwrite a parent domain\u0027s cache entry, making it end sooner or later than\\notherwise intended.\\n\\nThis affects curl using applications that enable HSTS and use URLs with the\\ninsecure `HTTP://` scheme and perform transfers with hosts like\\n`x.example.com` as well as `example.com` where the first host is a subdomain\\nof the second host.\\n\\n(The HSTS cache either needs to have been populated manually or there needs to\\nhave been previous HTTPS accesses done as the cache needs to have entries for\\nthe domains involved to trigger this problem.)\\n\\nWhen `x.example.com` responds with `Strict-Transport-Security:` headers, this\\nbug can make the subdomain\u0027s expiry timeout *bleed over* and get set for the\\nparent domain `example.com` in curl\u0027s HSTS cache.\\n\\nThe result of a triggered bug is that HTTP accesses to `example.com` get\\nconverted to HTTPS for a different period of time than what was asked for by\\nthe origin server. If `example.com` for example stops supporting HTTPS at its\\nexpiry time, curl might then fail to access `http://example.com` until the\\n(wrongly set) timeout expires. This bug can also expire the parent\u0027s entry\\n*earlier*, thus making curl inadvertently switch back to insecure HTTP earlier\\nthan otherwise intended.\"}, {\"lang\": \"es\", \"value\": \"Cuando se le pide a curl que use HSTS, el tiempo de expiraci\\u00f3n de un subdominio puede sobrescribir la entrada de cach\\u00e9 de un dominio principal, lo que hace que finalice antes o despu\\u00e9s de lo previsto. Esto afecta a curl que usa aplicaciones que habilitan HSTS y usan URL con el esquema inseguro `HTTP://` y realizan transferencias con hosts como `x.example.com` as\\u00ed como `example.com` donde el primer host es un subdominio del segundo host. (El cach\\u00e9 HSTS debe haberse llenado manualmente o debe haber habido accesos HTTPS previos ya que el cach\\u00e9 debe tener entradas para los dominios involucrados para activar este problema). Cuando `x.example.com` responde con encabezados `Strict-Transport-Security:`, este error puede hacer que el tiempo de expiraci\\u00f3n del subdominio *se extienda* y se configure para el dominio principal `example.com` en el cach\\u00e9 HSTS de curl. El resultado de un error activado es que los accesos HTTP a `example.com` se convierten a HTTPS durante un per\\u00edodo de tiempo diferente al solicitado por el servidor de origen. Si `example.com`, por ejemplo, deja de admitir HTTPS en su momento de vencimiento, curl podr\\u00eda entonces no poder acceder a `http://example.com` hasta que expire el tiempo de espera (configurado incorrectamente). Este error tambi\\u00e9n puede hacer que la entrada principal expire *antes*, lo que hace que curl vuelva inadvertidamente a HTTP inseguro antes de lo previsto.\"}]",
      "id": "CVE-2024-9681",
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    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2024-9681\",\"sourceIdentifier\":\"2499f714-1537-4658-8207-48ae4bb9eae9\",\"published\":\"2024-11-06T08:15:03.740\",\"lastModified\":\"2025-11-03T21:18:48.670\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"When curl is asked to use HSTS, the expiry time for a subdomain might\\noverwrite a parent domain\u0027s cache entry, making it end sooner or later than\\notherwise intended.\\n\\nThis affects curl using applications that enable HSTS and use URLs with the\\ninsecure `HTTP://` scheme and perform transfers with hosts like\\n`x.example.com` as well as `example.com` where the first host is a subdomain\\nof the second host.\\n\\n(The HSTS cache either needs to have been populated manually or there needs to\\nhave been previous HTTPS accesses done as the cache needs to have entries for\\nthe domains involved to trigger this problem.)\\n\\nWhen `x.example.com` responds with `Strict-Transport-Security:` headers, this\\nbug can make the subdomain\u0027s expiry timeout *bleed over* and get set for the\\nparent domain `example.com` in curl\u0027s HSTS cache.\\n\\nThe result of a triggered bug is that HTTP accesses to `example.com` get\\nconverted to HTTPS for a different period of time than what was asked for by\\nthe origin server. If `example.com` for example stops supporting HTTPS at its\\nexpiry time, curl might then fail to access `http://example.com` until the\\n(wrongly set) timeout expires. This bug can also expire the parent\u0027s entry\\n*earlier*, thus making curl inadvertently switch back to insecure HTTP earlier\\nthan otherwise intended.\"},{\"lang\":\"es\",\"value\":\"Cuando se le pide a curl que use HSTS, el tiempo de expiraci\u00f3n de un subdominio puede sobrescribir la entrada de cach\u00e9 de un dominio principal, lo que hace que finalice antes o despu\u00e9s de lo previsto. Esto afecta a curl que usa aplicaciones que habilitan HSTS y usan URL con el esquema inseguro `HTTP://` y realizan transferencias con hosts como `x.example.com` as\u00ed como `example.com` donde el primer host es un subdominio del segundo host. (El cach\u00e9 HSTS debe haberse llenado manualmente o debe haber habido accesos HTTPS previos ya que el cach\u00e9 debe tener entradas para los dominios involucrados para activar este problema). Cuando `x.example.com` responde con encabezados `Strict-Transport-Security:`, este error puede hacer que el tiempo de expiraci\u00f3n del subdominio *se extienda* y se configure para el dominio principal `example.com` en el cach\u00e9 HSTS de curl. El resultado de un error activado es que los accesos HTTP a `example.com` se convierten a HTTPS durante un per\u00edodo de tiempo diferente al solicitado por el servidor de origen. Si `example.com`, por ejemplo, deja de admitir HTTPS en su momento de vencimiento, curl podr\u00eda entonces no poder acceder a `http://example.com` hasta que expire el tiempo de espera (configurado incorrectamente). Este error tambi\u00e9n puede hacer que la entrada principal expire *antes*, lo que hace que curl vuelva inadvertidamente a HTTP inseguro antes de lo previsto.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:L\",\"baseScore\":6.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"HIGH\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"LOW\"},\"exploitabilityScore\":2.2,\"impactScore\":4.2},{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N\",\"baseScore\":5.9,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"HIGH\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":2.2,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-697\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"7.74.0\",\"versionEndExcluding\":\"8.11.0\",\"matchCriteriaId\":\"D26CBA59-021E-46CB-A1A0-5AD682F6685E\"}]}]}],\"references\":[{\"url\":\"https://curl.se/docs/CVE-2024-9681.html\",\"source\":\"2499f714-1537-4658-8207-48ae4bb9eae9\",\"tags\":[\"Patch\",\"Vendor Advisory\"]},{\"url\":\"https://curl.se/docs/CVE-2024-9681.json\",\"source\":\"2499f714-1537-4658-8207-48ae4bb9eae9\",\"tags\":[\"Vendor Advisory\"]},{\"url\":\"https://hackerone.com/reports/2764830\",\"source\":\"2499f714-1537-4658-8207-48ae4bb9eae9\",\"tags\":[\"Exploit\",\"Issue Tracking\",\"Patch\",\"Third Party Advisory\"]},{\"url\":\"http://seclists.org/fulldisclosure/2025/Apr/10\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"http://seclists.org/fulldisclosure/2025/Apr/11\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"http://seclists.org/fulldisclosure/2025/Apr/12\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"http://seclists.org/fulldisclosure/2025/Apr/13\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"http://seclists.org/fulldisclosure/2025/Apr/4\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"http://seclists.org/fulldisclosure/2025/Apr/5\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"http://seclists.org/fulldisclosure/2025/Apr/8\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"http://seclists.org/fulldisclosure/2025/Apr/9\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"http://www.openwall.com/lists/oss-security/2024/11/06/2\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\",\"Patch\",\"Third Party Advisory\"]},{\"url\":\"https://security.netapp.com/advisory/ntap-20241213-0006/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"http://www.openwall.com/lists/oss-security/2024/11/06/2\"}, {\"url\": \"https://security.netapp.com/advisory/ntap-20241213-0006/\"}, {\"url\": \"http://seclists.org/fulldisclosure/2025/Apr/13\"}, {\"url\": \"http://seclists.org/fulldisclosure/2025/Apr/10\"}, {\"url\": \"http://seclists.org/fulldisclosure/2025/Apr/9\"}, {\"url\": \"http://seclists.org/fulldisclosure/2025/Apr/8\"}, {\"url\": \"http://seclists.org/fulldisclosure/2025/Apr/5\"}, {\"url\": \"http://seclists.org/fulldisclosure/2025/Apr/4\"}, {\"url\": \"http://seclists.org/fulldisclosure/2025/Apr/12\"}, {\"url\": \"http://seclists.org/fulldisclosure/2025/Apr/11\"}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2025-11-03T20:56:39.087Z\"}}, {\"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:H/A:N\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"HIGH\", \"availabilityImpact\": \"NONE\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"NONE\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-9681\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-11-06T16:16:59.652768Z\"}}}], \"affected\": [{\"cpes\": [\"cpe:2.3:a:curl:curl:*:*:*:*:*:*:*:*\"], \"vendor\": \"curl\", \"product\": \"curl\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"7.74.0\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"7.74.0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"8.10.1\"}, {\"status\": \"unaffected\", \"version\": \"8.11.0\", \"lessThan\": \"*\", \"versionType\": \"semver\"}], \"defaultStatus\": \"unknown\"}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-11-06T16:17:14.568Z\"}}], \"cna\": {\"title\": \"HSTS subdomain overwrites parent cache entry\", \"credits\": [{\"lang\": \"en\", \"type\": \"finder\", \"value\": \"newfunction\"}, {\"lang\": \"en\", \"type\": \"remediation developer\", \"value\": \"Daniel Stenberg\"}], \"affected\": [{\"vendor\": \"curl\", \"product\": \"curl\", \"versions\": [{\"status\": \"affected\", \"version\": \"8.10.1\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"8.10.1\"}, {\"status\": \"affected\", \"version\": \"8.10.0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"8.10.0\"}, {\"status\": \"affected\", \"version\": \"8.9.1\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"8.9.1\"}, {\"status\": \"affected\", \"version\": \"8.9.0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"8.9.0\"}, {\"status\": \"affected\", \"version\": \"8.8.0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"8.8.0\"}, {\"status\": \"affected\", \"version\": \"8.7.1\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"8.7.1\"}, {\"status\": \"affected\", \"version\": \"8.7.0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"8.7.0\"}, {\"status\": \"affected\", \"version\": \"8.6.0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"8.6.0\"}, {\"status\": \"affected\", \"version\": \"8.5.0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"8.5.0\"}, {\"status\": \"affected\", \"version\": \"8.4.0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"8.4.0\"}, {\"status\": \"affected\", \"version\": \"8.3.0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"8.3.0\"}, {\"status\": \"affected\", \"version\": \"8.2.1\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"8.2.1\"}, {\"status\": \"affected\", \"version\": \"8.2.0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"8.2.0\"}, {\"status\": \"affected\", \"version\": \"8.1.2\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"8.1.2\"}, {\"status\": \"affected\", \"version\": \"8.1.1\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"8.1.1\"}, {\"status\": \"affected\", \"version\": \"8.1.0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"8.1.0\"}, {\"status\": \"affected\", \"version\": \"8.0.1\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"8.0.1\"}, {\"status\": \"affected\", \"version\": \"8.0.0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"8.0.0\"}, {\"status\": \"affected\", \"version\": \"7.88.1\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"7.88.1\"}, {\"status\": \"affected\", \"version\": \"7.88.0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"7.88.0\"}, {\"status\": \"affected\", \"version\": \"7.87.0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"7.87.0\"}, {\"status\": \"affected\", \"version\": \"7.86.0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"7.86.0\"}, {\"status\": \"affected\", \"version\": \"7.85.0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"7.85.0\"}, {\"status\": \"affected\", \"version\": \"7.84.0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"7.84.0\"}, {\"status\": \"affected\", \"version\": \"7.83.1\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"7.83.1\"}, {\"status\": \"affected\", \"version\": \"7.83.0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"7.83.0\"}, {\"status\": \"affected\", \"version\": \"7.82.0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"7.82.0\"}, {\"status\": \"affected\", \"version\": \"7.81.0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"7.81.0\"}, {\"status\": \"affected\", \"version\": \"7.80.0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"7.80.0\"}, {\"status\": \"affected\", \"version\": \"7.79.1\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"7.79.1\"}, {\"status\": \"affected\", \"version\": \"7.79.0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"7.79.0\"}, {\"status\": \"affected\", \"version\": \"7.78.0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"7.78.0\"}, {\"status\": \"affected\", \"version\": \"7.77.0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"7.77.0\"}, {\"status\": \"affected\", \"version\": \"7.76.1\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"7.76.1\"}, {\"status\": \"affected\", \"version\": \"7.76.0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"7.76.0\"}, {\"status\": \"affected\", \"version\": \"7.75.0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"7.75.0\"}, {\"status\": \"affected\", \"version\": \"7.74.0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"7.74.0\"}], \"defaultStatus\": \"unaffected\"}], \"references\": [{\"url\": \"https://curl.se/docs/CVE-2024-9681.json\", \"name\": \"json\"}, {\"url\": \"https://curl.se/docs/CVE-2024-9681.html\", \"name\": \"www\"}, {\"url\": \"https://hackerone.com/reports/2764830\", \"name\": \"issue\"}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"When curl is asked to use HSTS, the expiry time for a subdomain might\\noverwrite a parent domain\u0027s cache entry, making it end sooner or later than\\notherwise intended.\\n\\nThis affects curl using applications that enable HSTS and use URLs with the\\ninsecure `HTTP://` scheme and perform transfers with hosts like\\n`x.example.com` as well as `example.com` where the first host is a subdomain\\nof the second host.\\n\\n(The HSTS cache either needs to have been populated manually or there needs to\\nhave been previous HTTPS accesses done as the cache needs to have entries for\\nthe domains involved to trigger this problem.)\\n\\nWhen `x.example.com` responds with `Strict-Transport-Security:` headers, this\\nbug can make the subdomain\u0027s expiry timeout *bleed over* and get set for the\\nparent domain `example.com` in curl\u0027s HSTS cache.\\n\\nThe result of a triggered bug is that HTTP accesses to `example.com` get\\nconverted to HTTPS for a different period of time than what was asked for by\\nthe origin server. If `example.com` for example stops supporting HTTPS at its\\nexpiry time, curl might then fail to access `http://example.com` until the\\n(wrongly set) timeout expires. This bug can also expire the parent\u0027s entry\\n*earlier*, thus making curl inadvertently switch back to insecure HTTP earlier\\nthan otherwise intended.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"description\": \"CWE-1025 Comparison Using Wrong Factors\"}]}], \"providerMetadata\": {\"orgId\": \"2499f714-1537-4658-8207-48ae4bb9eae9\", \"shortName\": \"curl\", \"dateUpdated\": \"2024-11-06T07:47:20.162Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-9681\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-11-03T20:56:39.087Z\", \"dateReserved\": \"2024-10-09T07:57:47.318Z\", \"assignerOrgId\": \"2499f714-1537-4658-8207-48ae4bb9eae9\", \"datePublished\": \"2024-11-06T07:47:20.162Z\", \"assignerShortName\": \"curl\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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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.