CVE-2024-38475 (GCVE-0-2024-38475)
Vulnerability from cvelistv5 – Published: 2024-07-01 18:15 – Updated: 2025-11-03 21:55Title
Apache HTTP Server weakness in mod_rewrite when first segment of substitution matches filesystem path.
Summary
Improper escaping of output in mod_rewrite in Apache HTTP Server 2.4.59 and earlier allows an attacker to map URLs to filesystem locations that are permitted to be served by the server but are not intentionally/directly reachable by any URL, resulting in code execution or source code disclosure.
Substitutions in server context that use a backreferences or variables as the first segment of the substitution are affected. Some unsafe RewiteRules will be broken by this change and the rewrite flag "UnsafePrefixStat" can be used to opt back in once ensuring the substitution is appropriately constrained.
Severity
9.1 (Critical)
SSVC
Exploitation: active
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-05-02 03:55 UTC
CWE
- CWE-116 - Improper Encoding or Escaping of Output
Assigner
References
7 references
Impacted products
3 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Apache Software Foundation | Apache HTTP Server |
Affected:
2.4.0 , ≤ 2.4.59
(semver)
|
guessed | |
| apache | http_server |
Affected:
2.4.0 , ≤ 2.4.59
(custom)
cpe:2.3:a:apache:http_server:2.4.0:*:*:*:*:*:*:* |
||
| netapp | ontap_9 |
Affected:
0 , < *
(custom)
cpe:2.3:a:netapp:ontap_9:-:*:*:*:*:*:*:* |
CISA
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 70f1e76d-21b5-484f-b14d-4e18035039fc
Exploited: Yes
Timestamps
First Seen: 2025-05-01
Asserted: 2025-05-01
Scope
Notes: Apache HTTP Server Improper Escaping of Output Vulnerability | Affected: Apache / HTTP Server | Description: Apache HTTP Server contains an improper escaping of output vulnerability in mod_rewrite that allows an attacker to map URLs to filesystem locations that are permitted to be served by the server but are not intentionally/directly reachable by any URL, resulting in code execution or source code disclosure. | Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. | Due date: 2025-05-22 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): This vulnerability affects a common open-source component, third-party library, or a protocol used by different products. Please check with specific vendors for information on patching status. For more information, please see: https://httpd.apache.org/security/vulnerabilities_24.html ; https://nvd.nist.gov/vuln/detail/CVE-2024-38475
Evidence
Type: Vendor Report
Signal: Successful Exploitation
Confidence: 80%
Source: cisa-kev
Details
| Cwes | CWE-116 |
|---|---|
| Feed | CISA Known Exploited Vulnerabilities Catalog |
| Product | HTTP Server |
| Due Date | 2025-05-22 |
| Date Added | 2025-05-01 |
| Vendorproject | Apache |
| Vulnerabilityname | Apache HTTP Server Improper Escaping of Output Vulnerability |
| Knownransomwarecampaignuse | Unknown |
References
Created: 2026-02-02 12:26 UTC
| Updated: 2026-11-04 13:36 UTC
Shadowserver
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 8d1a080e-1836-4910-8042-5c7530e41a29
Exploited: Yes
Characteristics
Severity:
91.0
Timestamps
First Seen: 2025-07-17
Asserted: 2025-07-17
Last Seen: 2026-11-10
Scope
Asset Exposure: ['internet-facing']
Notes: Affected: Apache / Apache HTTP Server | Class: web-server | Severity: Critical (CVSS 9.1) | IoT: no | In CISA KEV: yes | Honeypot connections on 2026-11-10: 11
Evidence
Type: Honeypot
Signal: In The Wild Attempts
Confidence: 70%
Source: shadowserver
Details
| 1D | 1 |
|---|---|
| Iot | no |
| Feed | Shadowserver Foundation honeypot/exploited-vulnerabilities |
| Type | http-scan |
| Class | web-server |
| 7D Avg | 0 |
| Vendor | Apache |
| 30D Avg | 0 |
| 90D Avg | 1 |
| Product | Apache HTTP Server |
| Cisa Kev | yes |
| Connections | 11 |
| Observation Date | 2026-11-10 |
| Vulnerability Class | CVSS |
| Vulnerability Score | 9.1 |
| Vulnerability Severity | Critical |
References
Created: 2026-06-30 09:22 UTC
| Updated: 2026-11-12 01:01 UTC
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 0397fa85-5518-4916-bf59-e76515254a50
Exploited: Yes
Timestamps
First Seen: 2025-05-01
Asserted: 2025-05-01
Scope
Notes: KEVIntel entry: Apache HTTP Server weakness in mod_rewrite when first segment of substitution matches filesystem path. | Affected: Apache Software Foundation / Apache HTTP Server | CVSS: 9.1 (CRITICAL) | EPSS: 0.99957 | Used in malware: unknown | Not yet in CISA KEV: False
Evidence
Type: Public Report
Signal: Successful Exploitation
Confidence: 70%
Source: kevintel
Details
| Feed | KEVIntel (kevintel.com) |
|---|---|
| Title | Apache HTTP Server weakness in mod_rewrite when first segment of substitution matches filesystem path. |
| Vendor | Apache Software Foundation |
| Product | Apache HTTP Server |
| Added Date | 2025-05-01T00:00:00.000Z |
| Cvss Score | 9.1 |
| Epss Score | 0.99957 |
| Cvss Severity | CRITICAL |
| Epss Percentile | 0.99974 |
| Used In Malware | unknown |
| Ahead Of Cisa Kev | None |
| Not Yet In Cisa Kev | False |
References
Created: 2026-06-23 14:04 UTC
| Updated: 2026-07-10 06:14 UTC
{
"containers": {
"adp": [
{
"affected": [
{
"cpes": [
"cpe:2.3:a:apache:http_server:2.4.0:*:*:*:*:*:*:*"
],
"defaultStatus": "unaffected",
"product": "http_server",
"vendor": "apache",
"versions": [
{
"lessThanOrEqual": "2.4.59",
"status": "affected",
"version": "2.4.0",
"versionType": "custom"
}
]
},
{
"cpes": [
"cpe:2.3:a:netapp:ontap_9:-:*:*:*:*:*:*:*"
],
"defaultStatus": "unknown",
"product": "ontap_9",
"vendor": "netapp",
"versions": [
{
"lessThan": "*",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 9.1,
"baseSeverity": "CRITICAL",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2024-38475",
"options": [
{
"Exploitation": "active"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-05-02T03:55:18.245532Z",
"version": "2.0.3"
},
"type": "ssvc"
}
},
{
"other": {
"content": {
"dateAdded": "2025-05-01",
"reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-38475"
},
"type": "kev"
}
}
],
"providerMetadata": {
"dateUpdated": "2025-10-21T22:55:50.372Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"references": [
{
"tags": [
"government-resource"
],
"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-38475"
}
],
"timeline": [
{
"lang": "en",
"time": "2025-05-01T00:00:00.000Z",
"value": "CVE-2024-38475 added to CISA KEV"
}
],
"title": "CISA ADP Vulnrichment"
},
{
"providerMetadata": {
"dateUpdated": "2025-11-03T21:55:40.951Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"url": "https://www.blackhat.com/us-24/briefings/schedule/index.html#confusion-attacks-exploiting-hidden-semantic-ambiguity-in-apache-http-server-pre-recorded-40227"
},
{
"url": "https://github.com/apache/httpd/commit/9a6157d1e2f7ab15963020381054b48782bc18cf"
},
{
"tags": [
"vendor-advisory",
"x_transferred"
],
"url": "https://httpd.apache.org/security/vulnerabilities_24.html"
},
{
"tags": [
"x_transferred"
],
"url": "https://security.netapp.com/advisory/ntap-20240712-0001/"
},
{
"url": "http://www.openwall.com/lists/oss-security/2024/07/01/8"
},
{
"url": "https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2024-0018"
}
],
"title": "CVE Program Container"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Apache HTTP Server",
"vendor": "Apache Software Foundation",
"versions": [
{
"lessThanOrEqual": "2.4.59",
"status": "affected",
"version": "2.4.0",
"versionType": "semver"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Orange Tsai (@orange_8361) from DEVCORE"
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "Improper escaping of output in mod_rewrite in Apache HTTP Server 2.4.59 and earlier allows an attacker to map URLs to filesystem locations that are\u0026nbsp;permitted to be served by the server but are not intentionally/directly reachable by any URL, resulting in code execution or source code disclosure. \u003cbr\u003e\u003cbr\u003eSubstitutions in\u0026nbsp;server context that use a backreferences or variables as the first segment of the substitution are affected.\u0026nbsp; Some unsafe RewiteRules will be broken by this change and the rewrite flag \"UnsafePrefixStat\" can be used to opt back in once ensuring the substitution is appropriately constrained."
}
],
"value": "Improper escaping of output in mod_rewrite in Apache HTTP Server 2.4.59 and earlier allows an attacker to map URLs to filesystem locations that are\u00a0permitted to be served by the server but are not intentionally/directly reachable by any URL, resulting in code execution or source code disclosure. \n\nSubstitutions in\u00a0server context that use a backreferences or variables as the first segment of the substitution are affected.\u00a0 Some unsafe RewiteRules will be broken by this change and the rewrite flag \"UnsafePrefixStat\" can be used to opt back in once ensuring the substitution is appropriately constrained."
}
],
"metrics": [
{
"other": {
"content": {
"text": "important"
},
"type": "Textual description of severity"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-116",
"description": "CWE-116 Improper Encoding or Escaping of Output",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2024-07-12T14:06:09.772Z",
"orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
"shortName": "apache"
},
"references": [
{
"tags": [
"vendor-advisory"
],
"url": "https://httpd.apache.org/security/vulnerabilities_24.html"
},
{
"url": "https://security.netapp.com/advisory/ntap-20240712-0001/"
}
],
"source": {
"discovery": "UNKNOWN"
},
"timeline": [
{
"lang": "en",
"time": "2024-04-01T12:00:00.000Z",
"value": "reported"
}
],
"title": "Apache HTTP Server weakness in mod_rewrite when first segment of substitution matches filesystem path.",
"x_generator": {
"engine": "Vulnogram 0.1.0-dev"
}
}
},
"cveMetadata": {
"assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
"assignerShortName": "apache",
"cveId": "CVE-2024-38475",
"datePublished": "2024-07-01T18:15:12.292Z",
"dateReserved": "2024-06-17T11:09:56.096Z",
"dateUpdated": "2025-11-03T21:55:40.951Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"cisa_known_exploited": {
"cveID": "CVE-2024-38475",
"cwes": [
"CWE-116"
],
"dateAdded": "2025-05-01",
"dueDate": "2025-05-22",
"forensicTriage": "No",
"knownRansomwareCampaignUse": "Unknown",
"notes": "This vulnerability affects a common open-source component, third-party library, or a protocol used by different products. Please check with specific vendors for information on patching status. For more information, please see: https://httpd.apache.org/security/vulnerabilities_24.html ; https://nvd.nist.gov/vuln/detail/CVE-2024-38475",
"product": "HTTP Server",
"requiredAction": "Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.",
"shortDescription": "Apache HTTP Server contains an improper escaping of output vulnerability in mod_rewrite that allows an attacker to map URLs to filesystem locations that are permitted to be served by the server but are not intentionally/directly reachable by any URL, resulting in code execution or source code disclosure.",
"vendorProject": "Apache",
"vulnerabilityName": "Apache HTTP Server Improper Escaping of Output Vulnerability"
},
"epss": {
"cve": "CVE-2024-38475",
"date": "2026-11-11",
"epss": "0.99957",
"percentile": "0.99975"
},
"fkie_nvd": {
"descriptions": [
{
"lang": "en",
"value": "Improper escaping of output in mod_rewrite in Apache HTTP Server 2.4.59 and earlier allows an attacker to map URLs to filesystem locations that are\u00a0permitted to be served by the server but are not intentionally/directly reachable by any URL, resulting in code execution or source code disclosure. \n\nSubstitutions in\u00a0server context that use a backreferences or variables as the first segment of the substitution are affected.\u00a0 Some unsafe RewiteRules will be broken by this change and the rewrite flag \"UnsafePrefixStat\" can be used to opt back in once ensuring the substitution is appropriately constrained."
},
{
"lang": "es",
"value": "El escape inadecuado de la salida en mod_rewrite en Apache HTTP Server 2.4.59 y versiones anteriores permite a un atacante asignar URL a ubicaciones del sistema de archivos que el servidor permite servir, pero a las que no se puede acceder intencional o directamente mediante ninguna URL, dando como resultado la ejecuci\u00f3n del c\u00f3digo o la divulgaci\u00f3n del c\u00f3digo fuente. Las sustituciones en el contexto del servidor que utilizan referencias inversas o variables como primer segmento de la sustituci\u00f3n se ven afectadas. Este cambio romper\u00e1 algunas RewiteRules inseguras y el indicador de reescritura \"UnsafePrefixStat\" se puede usar para volver a participar una vez que se garantice que la sustituci\u00f3n est\u00e9 restringida adecuadamente."
}
],
"id": "CVE-2024-38475",
"lastModified": "2024-11-21T09:26:03.180",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 9.1,
"baseSeverity": "CRITICAL",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
"version": "3.1"
},
"exploitabilityScore": 3.9,
"impactScore": 5.2,
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"type": "Secondary"
}
]
},
"published": "2024-07-01T19:15:04.883",
"references": [
{
"source": "security@apache.org",
"url": "https://httpd.apache.org/security/vulnerabilities_24.html"
},
{
"source": "security@apache.org",
"url": "https://security.netapp.com/advisory/ntap-20240712-0001/"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.openwall.com/lists/oss-security/2024/07/01/8"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://github.com/apache/httpd/commit/9a6157d1e2f7ab15963020381054b48782bc18cf"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://httpd.apache.org/security/vulnerabilities_24.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://security.netapp.com/advisory/ntap-20240712-0001/"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://www.blackhat.com/us-24/briefings/schedule/index.html#confusion-attacks-exploiting-hidden-semantic-ambiguity-in-apache-http-server-pre-recorded-40227"
}
],
"sourceIdentifier": "security@apache.org",
"vulnStatus": "Awaiting Analysis",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-116"
}
],
"source": "security@apache.org",
"type": "Secondary"
}
]
},
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "Apache HTTP Server",
"vendor": "Apache Software Foundation",
"versions": [
{
"lessThanOrEqual": "2.4.59",
"status": "affected",
"version": "2.4.0",
"versionType": "semver"
}
]
}
],
"source": "security@apache.org"
},
{
"affectedData": [
{
"cpes": [
"cpe:2.3:a:apache:http_server:2.4.0:*:*:*:*:*:*:*"
],
"defaultStatus": "unaffected",
"product": "http_server",
"vendor": "apache",
"versions": [
{
"lessThanOrEqual": "2.4.59",
"status": "affected",
"version": "2.4.0",
"versionType": "custom"
}
]
},
{
"cpes": [
"cpe:2.3:a:netapp:ontap_9:-:*:*:*:*:*:*:*"
],
"defaultStatus": "unknown",
"product": "ontap_9",
"vendor": "netapp",
"versions": [
{
"lessThan": "*",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
}
],
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
}
],
"cisaActionDue": "2025-05-22",
"cisaExploitAdd": "2025-05-01",
"cisaRequiredAction": "Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.",
"cisaVulnerabilityName": "Apache HTTP Server Improper Escaping of Output Vulnerability",
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*",
"matchCriteriaId": "13126636-FD76-4E3E-B949-14A5082DE02A",
"versionEndExcluding": "2.4.60",
"versionStartIncluding": "2.4.0",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:netapp:ontap_9:-:*:*:*:*:*:*:*",
"matchCriteriaId": "AD886814-B4A0-4764-9F08-2060601D8E89",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:sonicwall:sma_200_firmware:*:*:*:*:*:*:*:*",
"matchCriteriaId": "7F9F8CFF-F9A3-40EF-A630-62A2AC4681FA",
"versionEndExcluding": "10.2.1.14-75sv",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
},
{
"cpeMatch": [
{
"criteria": "cpe:2.3:h:sonicwall:sma_200:-:*:*:*:*:*:*:*",
"matchCriteriaId": "0B190266-AD6F-401B-9B2E-061CDD539236",
"vulnerable": false
}
],
"negate": false,
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:sonicwall:sma_210_firmware:*:*:*:*:*:*:*:*",
"matchCriteriaId": "013150EC-D511-4219-8668-805B6E6EA43F",
"versionEndExcluding": "10.2.1.14-75sv",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
},
{
"cpeMatch": [
{
"criteria": "cpe:2.3:h:sonicwall:sma_210:-:*:*:*:*:*:*:*",
"matchCriteriaId": "51587338-4A5F-41FC-9497-743F061947C2",
"vulnerable": false
}
],
"negate": false,
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:sonicwall:sma_400_firmware:*:*:*:*:*:*:*:*",
"matchCriteriaId": "E74E33FD-25F4-443D-B20E-E5BE67310365",
"versionEndExcluding": "10.2.1.14-75sv",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
},
{
"cpeMatch": [
{
"criteria": "cpe:2.3:h:sonicwall:sma_400:-:*:*:*:*:*:*:*",
"matchCriteriaId": "9D728332-10C9-4508-B720-569D44E99543",
"vulnerable": false
}
],
"negate": false,
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:sonicwall:sma_410_firmware:*:*:*:*:*:*:*:*",
"matchCriteriaId": "E76E31C1-0DFA-4F7C-A7E9-9C9846AE6ED2",
"versionEndExcluding": "10.2.1.14-75sv",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
},
{
"cpeMatch": [
{
"criteria": "cpe:2.3:h:sonicwall:sma_410:-:*:*:*:*:*:*:*",
"matchCriteriaId": "9DFB8FBC-FFA4-4526-B306-D5692A43DC9E",
"vulnerable": false
}
],
"negate": false,
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:sonicwall:sma_500v_firmware:*:*:*:*:*:*:*:*",
"matchCriteriaId": "5E49B94A-119E-4C1D-81CD-3792F62AFE00",
"versionEndExcluding": "10.2.1.14-75sv",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
},
{
"cpeMatch": [
{
"criteria": "cpe:2.3:h:sonicwall:sma_500v:-:*:*:*:*:*:*:*",
"matchCriteriaId": "A6AD8A33-7CE4-4C66-9E23-F0C9C9638770",
"vulnerable": false
}
],
"negate": false,
"operator": "OR"
}
],
"operator": "AND"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "Improper escaping of output in mod_rewrite in Apache HTTP Server 2.4.59 and earlier allows an attacker to map URLs to filesystem locations that are\u00a0permitted to be served by the server but are not intentionally/directly reachable by any URL, resulting in code execution or source code disclosure. \n\nSubstitutions in\u00a0server context that use a backreferences or variables as the first segment of the substitution are affected.\u00a0 Some unsafe RewiteRules will be broken by this change and the rewrite flag \"UnsafePrefixStat\" can be used to opt back in once ensuring the substitution is appropriately constrained."
},
{
"lang": "es",
"value": "El escape inadecuado de la salida en mod_rewrite en Apache HTTP Server 2.4.59 y versiones anteriores permite a un atacante asignar URL a ubicaciones del sistema de archivos que el servidor permite servir, pero a las que no se puede acceder intencional o directamente mediante ninguna URL, dando como resultado la ejecuci\u00f3n del c\u00f3digo o la divulgaci\u00f3n del c\u00f3digo fuente. Las sustituciones en el contexto del servidor que utilizan referencias inversas o variables como primer segmento de la sustituci\u00f3n se ven afectadas. Este cambio romper\u00e1 algunas RewiteRules inseguras y el indicador de reescritura \"UnsafePrefixStat\" se puede usar para volver a participar una vez que se garantice que la sustituci\u00f3n est\u00e9 restringida adecuadamente."
}
],
"id": "CVE-2024-38475",
"lastModified": "2026-06-17T07:40:21.380",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 9.1,
"baseSeverity": "CRITICAL",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
"version": "3.1"
},
"exploitabilityScore": 3.9,
"impactScore": 5.2,
"source": "nvd@nist.gov",
"type": "Primary"
},
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 9.1,
"baseSeverity": "CRITICAL",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
"version": "3.1"
},
"exploitabilityScore": 3.9,
"impactScore": 5.2,
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"type": "Secondary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2024-38475",
"options": [
{
"exploitation": "active"
},
{
"automatable": "yes"
},
{
"technicalImpact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-05-02T03:55:18.245532Z",
"version": "2.0.3"
}
}
]
},
"published": "2024-07-01T19:15:04.883",
"references": [
{
"source": "security@apache.org",
"tags": [
"Vendor Advisory"
],
"url": "https://httpd.apache.org/security/vulnerabilities_24.html"
},
{
"source": "security@apache.org",
"tags": [
"Third Party Advisory"
],
"url": "https://security.netapp.com/advisory/ntap-20240712-0001/"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "http://www.openwall.com/lists/oss-security/2024/07/01/8"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Patch"
],
"url": "https://github.com/apache/httpd/commit/9a6157d1e2f7ab15963020381054b48782bc18cf"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Vendor Advisory"
],
"url": "https://httpd.apache.org/security/vulnerabilities_24.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2024-0018"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "https://security.netapp.com/advisory/ntap-20240712-0001/"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "https://www.blackhat.com/us-24/briefings/schedule/index.html#confusion-attacks-exploiting-hidden-semantic-ambiguity-in-apache-http-server-pre-recorded-40227"
},
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"tags": [
"Third Party Advisory",
"US Government Resource"
],
"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-38475"
}
],
"sourceIdentifier": "security@apache.org",
"vulnStatus": "Analyzed",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-116"
}
],
"source": "security@apache.org",
"type": "Secondary"
}
]
}
},
"redhat_vex": {
"aggregate_severity": "Important",
"current_release_date": "2026-11-04T21:14:00+00:00",
"cve": "CVE-2024-38475",
"id": "CVE-2024-38475",
"initial_release_date": "2024-07-01T00:00:00+00:00",
"product_status:fixed": "749",
"product_status:known_not_affected": "7",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "httpd: Improper escaping of output in mod_rewrite",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-38475.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "important",
"current_release_date": "2026-10-16T13:14:25Z",
"cve": "CVE-2024-38475",
"id": "CVE-2024-38475",
"initial_release_date": "2025-02-14T04:53:37Z",
"product_status:known_affected": "540",
"product_status:recommended": "347",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2024-38475",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/2025/cve-2024-38475.json",
"version": "34"
},
"vulnrichment": {
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2025-11-03T21:55:40.951Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"url": "https://www.blackhat.com/us-24/briefings/schedule/index.html#confusion-attacks-exploiting-hidden-semantic-ambiguity-in-apache-http-server-pre-recorded-40227"
},
{
"url": "https://github.com/apache/httpd/commit/9a6157d1e2f7ab15963020381054b48782bc18cf"
},
{
"tags": [
"vendor-advisory",
"x_transferred"
],
"url": "https://httpd.apache.org/security/vulnerabilities_24.html"
},
{
"tags": [
"x_transferred"
],
"url": "https://security.netapp.com/advisory/ntap-20240712-0001/"
},
{
"url": "http://www.openwall.com/lists/oss-security/2024/07/01/8"
},
{
"url": "https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2024-0018"
}
],
"title": "CVE Program Container"
},
{
"affected": [
{
"cpes": [
"cpe:2.3:a:apache:http_server:2.4.0:*:*:*:*:*:*:*"
],
"defaultStatus": "unaffected",
"product": "http_server",
"vendor": "apache",
"versions": [
{
"lessThanOrEqual": "2.4.59",
"status": "affected",
"version": "2.4.0",
"versionType": "custom"
}
]
},
{
"cpes": [
"cpe:2.3:a:netapp:ontap_9:-:*:*:*:*:*:*:*"
],
"defaultStatus": "unknown",
"product": "ontap_9",
"vendor": "netapp",
"versions": [
{
"lessThan": "*",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 9.1,
"baseSeverity": "CRITICAL",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2024-38475",
"options": [
{
"Exploitation": "active"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-05-02T03:55:18.245532Z",
"version": "2.0.3"
},
"type": "ssvc"
}
},
{
"other": {
"content": {
"dateAdded": "2025-05-01",
"reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-38475"
},
"type": "kev"
}
}
],
"providerMetadata": {
"dateUpdated": "2024-07-05T18:02:10.851Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"references": [
{
"tags": [
"government-resource"
],
"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-38475"
}
],
"timeline": [
{
"lang": "en",
"time": "2025-05-01T00:00:00+00:00",
"value": "CVE-2024-38475 added to CISA KEV"
}
],
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Apache HTTP Server",
"vendor": "Apache Software Foundation",
"versions": [
{
"lessThanOrEqual": "2.4.59",
"status": "affected",
"version": "2.4.0",
"versionType": "semver"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Orange Tsai (@orange_8361) from DEVCORE"
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "Improper escaping of output in mod_rewrite in Apache HTTP Server 2.4.59 and earlier allows an attacker to map URLs to filesystem locations that are\u0026nbsp;permitted to be served by the server but are not intentionally/directly reachable by any URL, resulting in code execution or source code disclosure. \u003cbr\u003e\u003cbr\u003eSubstitutions in\u0026nbsp;server context that use a backreferences or variables as the first segment of the substitution are affected.\u0026nbsp; Some unsafe RewiteRules will be broken by this change and the rewrite flag \"UnsafePrefixStat\" can be used to opt back in once ensuring the substitution is appropriately constrained."
}
],
"value": "Improper escaping of output in mod_rewrite in Apache HTTP Server 2.4.59 and earlier allows an attacker to map URLs to filesystem locations that are\u00a0permitted to be served by the server but are not intentionally/directly reachable by any URL, resulting in code execution or source code disclosure. \n\nSubstitutions in\u00a0server context that use a backreferences or variables as the first segment of the substitution are affected.\u00a0 Some unsafe RewiteRules will be broken by this change and the rewrite flag \"UnsafePrefixStat\" can be used to opt back in once ensuring the substitution is appropriately constrained."
}
],
"metrics": [
{
"other": {
"content": {
"text": "important"
},
"type": "Textual description of severity"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-116",
"description": "CWE-116 Improper Encoding or Escaping of Output",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2024-07-12T14:06:09.772Z",
"orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
"shortName": "apache"
},
"references": [
{
"tags": [
"vendor-advisory"
],
"url": "https://httpd.apache.org/security/vulnerabilities_24.html"
},
{
"url": "https://security.netapp.com/advisory/ntap-20240712-0001/"
}
],
"source": {
"discovery": "UNKNOWN"
},
"timeline": [
{
"lang": "en",
"time": "2024-04-01T12:00:00.000Z",
"value": "reported"
}
],
"title": "Apache HTTP Server weakness in mod_rewrite when first segment of substitution matches filesystem path.",
"x_generator": {
"engine": "Vulnogram 0.1.0-dev"
}
}
},
"cveMetadata": {
"assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
"assignerShortName": "apache",
"cveId": "CVE-2024-38475",
"datePublished": "2024-07-01T18:15:12.292Z",
"dateReserved": "2024-06-17T11:09:56.096Z",
"dateUpdated": "2025-11-03T21:55:40.951Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
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.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
How durations are calculated
Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.
Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.
Loading timeline…
Loading…
Loading…
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.
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.
Loading…
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.