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Title
Apache httpd Limit指令信息泄露漏洞
Description
Apache HTTP Server是Apache软件基金会的一个开放源代码的网页服务器。
Apache HTTP Server用户.htaccess文件中设置Limit指令存在安全漏洞，允许远程攻击者利用漏洞构建恶意请求，获取敏感内存信息。
Severity
中
Patch Name
Apache httpd Limit指令信息泄露漏洞的补丁
Patch Description
Apache HTTP Server是Apache软件基金会的一个开放源代码的网页服务器。
Apache HTTP Server用户.htaccess文件中设置Limit指令存在安全漏洞，允许远程攻击者利用漏洞构建恶意请求，获取敏感内存信息。目前，供应商发布了安全公告及相关补丁信息，修复了此漏洞。
Formal description
用户可参考如下厂商提供的安全补丁以修复该漏洞： https://github.com/apache/httpd/commit/29afdd2550b3d30a8defece2b95ae81edcf66ac9
Reference
https://nvd.nist.gov/vuln/detail/CVE-2017-9798
Impacted products
| Name | ['Apache HTTP Server 2.2.34', 'Apache HTTP Server 2.4.*'] |
|---|
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CVE-2017-9798 (GCVE-0-2017-9798)
Vulnerability from cvelistv5 – Published: 2017-09-18 15:00 – Updated: 2025-11-04 16:09
VLAI
EPSS
VEX
Summary
Apache httpd allows remote attackers to read secret data from process memory if the Limit directive can be set in a user's .htaccess file, or if httpd.conf has certain misconfigurations, aka Optionsbleed. This affects the Apache HTTP Server through 2.2.34 and 2.4.x through 2.4.27. The attacker sends an unauthenticated OPTIONS HTTP request when attempting to read secret data. This is a use-after-free issue and thus secret data is not always sent, and the specific data depends on many factors including configuration. Exploitation with .htaccess can be blocked with a patch to the ap_limit_section function in server/core.c.
Severity
No CVSS data available.
CWE
- use-after-free
Assigner
References
56 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache HTTP Server |
Affected:
Apache HTTP Server through 2.2.34 and 2.4.x through 2.4.27
|
Date Public
2017-09-18 00:00
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"url": "https://svn.apache.org/viewvc/httpd/httpd/branches/2.4.x/server/core.c?r1=1805223\u0026r2=1807754\u0026pathrev=1807754\u0026view=patch"
},
{
"name": "RHSA-2017:3240",
"refsource": "REDHAT",
"url": "https://access.redhat.com/errata/RHSA-2017:3240"
},
{
"name": "RHSA-2017:3195",
"refsource": "REDHAT",
"url": "https://access.redhat.com/errata/RHSA-2017:3195"
},
{
"name": "RHSA-2017:3018",
"refsource": "REDHAT",
"url": "https://access.redhat.com/errata/RHSA-2017:3018"
},
{
"name": "http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.html",
"refsource": "CONFIRM",
"url": "http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.html"
},
{
"name": "RHSA-2017:3239",
"refsource": "REDHAT",
"url": "https://access.redhat.com/errata/RHSA-2017:3239"
},
{
"name": "RHSA-2017:3476",
"refsource": "REDHAT",
"url": "https://access.redhat.com/errata/RHSA-2017:3476"
},
{
"name": "105598",
"refsource": "BID",
"url": "http://www.securityfocus.com/bid/105598"
},
{
"name": "https://httpd.apache.org/security/vulnerabilities_24.html#CVE-2017-9798",
"refsource": "CONFIRM",
"url": "https://httpd.apache.org/security/vulnerabilities_24.html#CVE-2017-9798"
},
{
"name": "http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html",
"refsource": "CONFIRM",
"url": "http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html"
},
{
"name": "RHSA-2017:3114",
"refsource": "REDHAT",
"url": "https://access.redhat.com/errata/RHSA-2017:3114"
},
{
"name": "RHSA-2017:3477",
"refsource": "REDHAT",
"url": "https://access.redhat.com/errata/RHSA-2017:3477"
},
{
"name": "http://openwall.com/lists/oss-security/2017/09/18/2",
"refsource": "MISC",
"url": "http://openwall.com/lists/oss-security/2017/09/18/2"
},
{
"name": "https://security.netapp.com/advisory/ntap-20180601-0003/",
"refsource": "CONFIRM",
"url": "https://security.netapp.com/advisory/ntap-20180601-0003/"
},
{
"name": "RHSA-2017:3194",
"refsource": "REDHAT",
"url": "https://access.redhat.com/errata/RHSA-2017:3194"
},
{
"name": "https://security-tracker.debian.org/tracker/CVE-2017-9798",
"refsource": "MISC",
"url": "https://security-tracker.debian.org/tracker/CVE-2017-9798"
},
{
"name": "RHSA-2017:3193",
"refsource": "REDHAT",
"url": "https://access.redhat.com/errata/RHSA-2017:3193"
},
{
"name": "DSA-3980",
"refsource": "DEBIAN",
"url": "http://www.debian.org/security/2017/dsa-3980"
},
{
"name": "https://blog.fuzzing-project.org/60-Optionsbleed-HTTP-OPTIONS-method-can-leak-Apaches-server-memory.html",
"refsource": "MISC",
"url": "https://blog.fuzzing-project.org/60-Optionsbleed-HTTP-OPTIONS-method-can-leak-Apaches-server-memory.html"
},
{
"name": "42745",
"refsource": "EXPLOIT-DB",
"url": "https://www.exploit-db.com/exploits/42745/"
},
{
"name": "GLSA-201710-32",
"refsource": "GENTOO",
"url": "https://security.gentoo.org/glsa/201710-32"
},
{
"name": "https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html",
"refsource": "MISC",
"url": "https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html"
},
{
"name": "[httpd-cvs] 20190815 svn commit: r1048743 [4/4] - in /websites/staging/httpd/trunk/content: ./ security/vulnerabilities-httpd.xml security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.html",
"refsource": "MLIST",
"url": "https://lists.apache.org/thread.html/56c2e7cc9deb1c12a843d0dc251ea7fd3e7e80293cde02fcd65286ba@%3Ccvs.httpd.apache.org%3E"
},
{
"name": "[httpd-cvs] 20190815 svn commit: r1048742 [4/4] - in /websites/staging/httpd/trunk/content: ./ security/vulnerabilities-httpd.xml security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.html",
"refsource": "MLIST",
"url": "https://lists.apache.org/thread.html/84a3714f0878781f6ed84473d1a503d2cc382277e100450209231830@%3Ccvs.httpd.apache.org%3E"
},
{
"name": "[httpd-cvs] 20190815 svn commit: r1048743 [3/4] - in /websites/staging/httpd/trunk/content: ./ security/vulnerabilities-httpd.xml security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.html",
"refsource": "MLIST",
"url": "https://lists.apache.org/thread.html/8d63cb8e9100f28a99429b4328e4e7cebce861d5772ac9863ba2ae6f@%3Ccvs.httpd.apache.org%3E"
},
{
"name": "[httpd-cvs] 20190815 svn commit: r1048742 [3/4] - in /websites/staging/httpd/trunk/content: ./ security/vulnerabilities-httpd.xml security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.html",
"refsource": "MLIST",
"url": "https://lists.apache.org/thread.html/f7f95ac1cd9895db2714fa3ebaa0b94d0c6df360f742a40951384a53@%3Ccvs.httpd.apache.org%3E"
},
{
"name": "https://www.tenable.com/security/tns-2019-09",
"refsource": "CONFIRM",
"url": "https://www.tenable.com/security/tns-2019-09"
},
{
"name": "[httpd-cvs] 20200401 svn commit: r1058586 [3/4] - in /websites/staging/httpd/trunk/content: ./ security/vulnerabilities-httpd.xml security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.html",
"refsource": "MLIST",
"url": "https://lists.apache.org/thread.html/r57608dc51b79102f3952ae06f54d5277b649c86d6533dcd6a7d201f7@%3Ccvs.httpd.apache.org%3E"
},
{
"name": "[httpd-cvs] 20200401 svn commit: r1058586 [4/4] - in /websites/staging/httpd/trunk/content: ./ security/vulnerabilities-httpd.xml security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.html",
"refsource": "MLIST",
"url": "https://lists.apache.org/thread.html/rd18c3c43602e66f9cdcf09f1de233804975b9572b0456cc582390b6f@%3Ccvs.httpd.apache.org%3E"
},
{
"name": "[httpd-cvs] 20200401 svn commit: r1058587 [4/4] - in /websites/staging/httpd/trunk/content: ./ security/vulnerabilities-httpd.xml security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.html",
"refsource": "MLIST",
"url": "https://lists.apache.org/thread.html/re3d27b6250aa8548b8845d314bb8a350b3df326cacbbfdfe4d455234@%3Ccvs.httpd.apache.org%3E"
},
{
"name": "[httpd-cvs] 20200401 svn commit: r1058587 [3/4] - in /websites/staging/httpd/trunk/content: ./ security/vulnerabilities-httpd.xml security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.html",
"refsource": "MLIST",
"url": "https://lists.apache.org/thread.html/rfbaf647d52c1cb843e726a0933f156366a806cead84fbd430951591b@%3Ccvs.httpd.apache.org%3E"
},
{
"name": "https://github.com/apache/httpd/commit/4cc27823899e070268b906ca677ee838d07cf67a",
"refsource": "MISC",
"url": "https://github.com/apache/httpd/commit/4cc27823899e070268b906ca677ee838d07cf67a"
},
{
"name": "[httpd-cvs] 20210330 svn commit: r1073139 [1/13] - in /websites/staging/httpd/trunk/content: ./ security/json/",
"refsource": "MLIST",
"url": "https://lists.apache.org/thread.html/rf6449464fd8b7437704c55f88361b66f12d5b5f90bcce66af4be4ba9@%3Ccvs.httpd.apache.org%3E"
},
{
"name": "[httpd-cvs] 20210330 svn commit: r1073140 [3/4] - in /websites/staging/httpd/trunk/content: ./ security/cvejsontohtml.py security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.html",
"refsource": "MLIST",
"url": "https://lists.apache.org/thread.html/r9ea3538f229874c80a10af473856a81fbf5f694cd7f471cc679ba70b@%3Ccvs.httpd.apache.org%3E"
},
{
"name": "[httpd-cvs] 20210330 svn commit: r1073140 [4/4] - in /websites/staging/httpd/trunk/content: ./ security/cvejsontohtml.py security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.html",
"refsource": "MLIST",
"url": "https://lists.apache.org/thread.html/rc998b18880df98bafaade071346690c2bc1444adaa1a1ea464b93f0a@%3Ccvs.httpd.apache.org%3E"
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{
"name": "[httpd-cvs] 20210330 svn commit: r1073139 [11/13] - in /websites/staging/httpd/trunk/content: ./ security/json/",
"refsource": "MLIST",
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},
{
"name": "[httpd-cvs] 20210330 svn commit: r1888194 [11/13] - /httpd/site/trunk/content/security/json/",
"refsource": "MLIST",
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},
{
"name": "[httpd-cvs] 20210330 svn commit: r1073146 [2/3] - in /websites/staging/httpd/trunk/content: ./ security/cvejsontohtml.py security/vulnerabilities-httpd.xml security/vulnerabilities_22.html security/vulnerabilities_24.html",
"refsource": "MLIST",
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{
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{
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},
{
"name": "[httpd-cvs] 20210330 svn commit: r1073146 [3/3] - in /websites/staging/httpd/trunk/content: ./ security/cvejsontohtml.py security/vulnerabilities-httpd.xml security/vulnerabilities_22.html security/vulnerabilities_24.html",
"refsource": "MLIST",
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},
{
"name": "[httpd-cvs] 20210606 svn commit: r1075470 [3/4] - in /websites/staging/httpd/trunk/content: ./ security/json/CVE-2020-13938.json security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.html",
"refsource": "MLIST",
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}
]
}
}
}
},
"cveMetadata": {
"assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
"assignerShortName": "apache",
"cveId": "CVE-2017-9798",
"datePublished": "2017-09-18T15:00:00.000Z",
"dateReserved": "2017-06-21T00:00:00.000Z",
"dateUpdated": "2025-11-04T16:09:11.219Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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Trend slope:
-
(linear fit over daily sighting counts)
Show additional events:
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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
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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.
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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.
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