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CERTFR-2021-AVI-759
Vulnerability from certfr_avis
De multiples vulnérabilités ont été découvertes dans Apache HTTP Server. Elles permettent à un attaquant de provoquer un déni de service à distance, une atteinte à l'intégrité des données et une atteinte à la confidentialité des données.
La vulnérabilité CVE-2021-41773 est activement exploitée et de nombreux codes d'exploitation sont publiquement disponibles sur Internet.
Solution
Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).
- Apache HTTP server version 2.4.49
Les vulnérabilités sont corrigées dans la version 2.4.50
Impacted products
| Vendor | Product | Description |
|---|
References
| Title | Publication Time | Tags | |||
|---|---|---|---|---|---|
|
|||||
{
"$ref": "https://www.cert.ssi.gouv.fr/openapi.json",
"affected_systems": [],
"affected_systems_content": "\u003cul\u003e \u003cli\u003eApache HTTP server version 2.4.49\u003c/li\u003e \u003c/ul\u003e \u003cp\u003eLes vuln\u00e9rabilit\u00e9s sont corrig\u00e9es dans la version 2.4.50\u003c/p\u003e ",
"content": "## Solution\n\nSe r\u00e9f\u00e9rer au bulletin de s\u00e9curit\u00e9 de l\u0027\u00e9diteur pour l\u0027obtention des\ncorrectifs (cf. section Documentation).\n",
"cves": [
{
"name": "CVE-2021-41524",
"url": "https://www.cve.org/CVERecord?id=CVE-2021-41524"
},
{
"name": "CVE-2021-41773",
"url": "https://www.cve.org/CVERecord?id=CVE-2021-41773"
}
],
"initial_release_date": "2021-10-06T00:00:00",
"last_revision_date": "2021-10-11T00:00:00",
"links": [],
"reference": "CERTFR-2021-AVI-759",
"revisions": [
{
"description": "Version initiale",
"revision_date": "2021-10-06T00:00:00.000000"
},
{
"description": "Correction du lien Apache.",
"revision_date": "2021-10-11T00:00:00.000000"
}
],
"risks": [
{
"description": "D\u00e9ni de service \u00e0 distance"
},
{
"description": "Atteinte \u00e0 l\u0027int\u00e9grit\u00e9 des donn\u00e9es"
},
{
"description": "Atteinte \u00e0 la confidentialit\u00e9 des donn\u00e9es"
}
],
"summary": "De multiples vuln\u00e9rabilit\u00e9s ont \u00e9t\u00e9 d\u00e9couvertes dans Apache HTTP Server.\nElles permettent \u00e0 un attaquant de provoquer un d\u00e9ni de service \u00e0\ndistance, une atteinte \u00e0 l\u0027int\u00e9grit\u00e9 des donn\u00e9es et une atteinte \u00e0 la\nconfidentialit\u00e9 des donn\u00e9es.\n\nLa vuln\u00e9rabilit\u00e9 CVE-2021-41773 est activement exploit\u00e9e et de nombreux\ncodes d\u0027exploitation sont publiquement disponibles sur Internet.\n",
"title": "Multiples vuln\u00e9rabilit\u00e9s dans Apache HTTP Server",
"vendor_advisories": [
{
"published_at": null,
"title": "Bulletin de s\u00e9curit\u00e9 Apache du 04 octobre 2021",
"url": "https://downloads.apache.org/httpd/CHANGES_2.4.50"
}
]
}
CVE-2021-41524 (GCVE-0-2021-41524)
Vulnerability from cvelistv5
Published
2021-10-05 08:40
Modified
2024-08-04 03:15
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-476 - NULL Pointer Dereference
Summary
While fuzzing the 2.4.49 httpd, a new null pointer dereference was detected during HTTP/2 request processing, allowing an external source to DoS the server. This requires a specially crafted request. The vulnerability was recently introduced in version 2.4.49. No exploit is known to the project.
References
| URL | Tags | |||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Apache Software Foundation | Apache HTTP Server |
Version: 2.4.49 |
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CVE-2021-41773 (GCVE-0-2021-41773)
Vulnerability from cvelistv5
Published
2021-10-05 08:40
Modified
2025-07-30 01:37
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Summary
A flaw was found in a change made to path normalization in Apache HTTP Server 2.4.49. An attacker could use a path traversal attack to map URLs to files outside the directories configured by Alias-like directives. If files outside of these directories are not protected by the usual default configuration "require all denied", these requests can succeed. If CGI scripts are also enabled for these aliased pathes, this could allow for remote code execution. This issue is known to be exploited in the wild. This issue only affects Apache 2.4.49 and not earlier versions. The fix in Apache HTTP Server 2.4.50 was found to be incomplete, see CVE-2021-42013.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Apache Software Foundation | Apache HTTP Server |
Version: Apache HTTP Server 2.4 2.4.49 |
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{
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},
{
"name": "[oss-security] 20211009 Re: CVE-2021-42013: Path Traversal and Remote Code Execution in Apache HTTP Server 2.4.49 and 2.4.50 (incomplete fix of CVE-2021-41773)",
"tags": [
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"name": "[oss-security] 20211011 Re: CVE-2021-42013: Path Traversal and Remote Code Execution in Apache HTTP Server 2.4.49 and 2.4.50 (incomplete fix of CVE-2021-41773)",
"refsource": "MLIST",
"url": "http://www.openwall.com/lists/oss-security/2021/10/11/4"
},
{
"name": "FEDORA-2021-2a10bc68a4",
"refsource": "FEDORA",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RMIIEFINL6FUIOPD2A3M5XC6DH45Y3CC/"
},
{
"name": "FEDORA-2021-aaf90ef84a",
"refsource": "FEDORA",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WS5RVHOIIRECG65ZBTZY7IEJVWQSQPG3/"
},
{
"name": "[oss-security] 20211015 Re: CVE-2021-42013: Path Traversal and Remote Code Execution in Apache HTTP Server 2.4.49 and 2.4.50 (incomplete fix of CVE-2021-41773)",
"refsource": "MLIST",
"url": "http://www.openwall.com/lists/oss-security/2021/10/15/3"
},
{
"name": "[oss-security] 20211016 Re: CVE-2021-42013: Path Traversal and Remote Code Execution in Apache HTTP Server 2.4.49 and 2.4.50 (incomplete fix of CVE-2021-41773)",
"refsource": "MLIST",
"url": "http://www.openwall.com/lists/oss-security/2021/10/16/1"
},
{
"name": "https://www.oracle.com/security-alerts/cpujan2022.html",
"refsource": "MISC",
"url": "https://www.oracle.com/security-alerts/cpujan2022.html"
},
{
"name": "https://security.netapp.com/advisory/ntap-20211029-0009/",
"refsource": "CONFIRM",
"url": "https://security.netapp.com/advisory/ntap-20211029-0009/"
},
{
"name": "http://packetstormsecurity.com/files/164629/Apache-2.4.49-2.4.50-Traversal-Remote-Code-Execution.html",
"refsource": "MISC",
"url": "http://packetstormsecurity.com/files/164629/Apache-2.4.49-2.4.50-Traversal-Remote-Code-Execution.html"
},
{
"name": "http://packetstormsecurity.com/files/164941/Apache-HTTP-Server-2.4.50-Remote-Code-Execution.html",
"refsource": "MISC",
"url": "http://packetstormsecurity.com/files/164941/Apache-HTTP-Server-2.4.50-Remote-Code-Execution.html"
},
{
"name": "GLSA-202208-20",
"refsource": "GENTOO",
"url": "https://security.gentoo.org/glsa/202208-20"
}
]
},
"source": {
"discovery": "UNKNOWN"
},
"timeline": [
{
"lang": "en",
"time": "2021-09-29T00:00:00",
"value": "reported"
},
{
"lang": "en",
"time": "2021-10-01T00:00:00",
"value": "fixed by r1893775 in 2.4.50"
}
]
}
}
},
"cveMetadata": {
"assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
"assignerShortName": "apache",
"cveId": "CVE-2021-41773",
"datePublished": "2021-10-05T08:40:12.000Z",
"dateReserved": "2021-09-29T00:00:00.000Z",
"dateUpdated": "2025-07-30T01:37:57.094Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
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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.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- 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.
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