CVE-2017-9798 (GCVE-0-2017-9798)

Vulnerability from cvelistv5 – Published: 2017-09-18 15:00 – Updated: 2025-11-04 16:09
VLAI
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
URL Tags
https://access.redhat.com/errata/RHSA-2017:3113 vendor-advisoryx_refsource_REDHAT
http://www.securityfocus.com/bid/100872 vdb-entryx_refsource_BID
http://www.oracle.com/technetwork/security-adviso… x_refsource_CONFIRM
http://www.oracle.com/technetwork/security-adviso… x_refsource_CONFIRM
https://www.oracle.com/technetwork/security-advis… x_refsource_CONFIRM
https://access.redhat.com/errata/RHSA-2017:2882 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2017:2972 vendor-advisoryx_refsource_REDHAT
https://blog.fuzzing-project.org/uploads/apache-2… x_refsource_MISC
https://support.apple.com/HT208331 x_refsource_CONFIRM
http://www.securitytracker.com/id/1039387 vdb-entryx_refsource_SECTRACK
https://support.hpe.com/hpsc/doc/public/display?d… x_refsource_CONFIRM
https://access.redhat.com/errata/RHSA-2017:3475 vendor-advisoryx_refsource_REDHAT
https://github.com/hannob/optionsbleed x_refsource_MISC
https://svn.apache.org/viewvc/httpd/httpd/branche… x_refsource_MISC
https://access.redhat.com/errata/RHSA-2017:3240 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2017:3195 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2017:3018 vendor-advisoryx_refsource_REDHAT
http://www.oracle.com/technetwork/security-adviso… x_refsource_CONFIRM
https://access.redhat.com/errata/RHSA-2017:3239 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2017:3476 vendor-advisoryx_refsource_REDHAT
http://www.securityfocus.com/bid/105598 vdb-entryx_refsource_BID
https://httpd.apache.org/security/vulnerabilities… x_refsource_CONFIRM
http://www.oracle.com/technetwork/security-adviso… x_refsource_CONFIRM
https://access.redhat.com/errata/RHSA-2017:3114 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2017:3477 vendor-advisoryx_refsource_REDHAT
http://openwall.com/lists/oss-security/2017/09/18/2 x_refsource_MISC
https://security.netapp.com/advisory/ntap-2018060… x_refsource_CONFIRM
https://access.redhat.com/errata/RHSA-2017:3194 vendor-advisoryx_refsource_REDHAT
https://security-tracker.debian.org/tracker/CVE-2… x_refsource_MISC
https://access.redhat.com/errata/RHSA-2017:3193 vendor-advisoryx_refsource_REDHAT
http://www.debian.org/security/2017/dsa-3980 vendor-advisoryx_refsource_DEBIAN
https://blog.fuzzing-project.org/60-Optionsbleed-… x_refsource_MISC
https://www.exploit-db.com/exploits/42745/ exploitx_refsource_EXPLOIT-DB
https://security.gentoo.org/glsa/201710-32 vendor-advisoryx_refsource_GENTOO
https://www.oracle.com/technetwork/security-advis… x_refsource_MISC
https://lists.apache.org/thread.html/56c2e7cc9deb… mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/84a3714f0878… mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/8d63cb8e9100… mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/f7f95ac1cd98… mailing-listx_refsource_MLIST
https://www.tenable.com/security/tns-2019-09 x_refsource_CONFIRM
https://lists.apache.org/thread.html/r57608dc51b7… mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/rd18c3c43602… mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/re3d27b6250a… mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/rfbaf647d52c… mailing-listx_refsource_MLIST
https://github.com/apache/httpd/commit/4cc2782389… x_refsource_MISC
https://lists.apache.org/thread.html/rf6449464fd8… mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/r9ea3538f229… mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/rc998b18880d… mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/r15f9aa44275… mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/rfcf929bd33a… mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/rdca61ae9906… mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/r9f93cf6dde3… mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/r6521a7f6227… mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/rcc44594d4d6… mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/r75cbe9ea3e2… mailing-listx_refsource_MLIST
Impacted products
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
Create a notification for this product.
Date Public
2017-09-18 00:00
Show details on NVD website
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  "cveMetadata": {
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    "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"
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  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2017-9798",
      "date": "2026-05-28",
      "epss": "0.9384",
      "percentile": "0.99871"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2017-9798\",\"sourceIdentifier\":\"security@apache.org\",\"published\":\"2017-09-18T15:29:00.307\",\"lastModified\":\"2026-05-13T00:24:29.033\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Apache httpd allows remote attackers to read secret data from process memory if the Limit directive can be set in a user\u0027s .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.\"},{\"lang\":\"es\",\"value\":\"Apache httpd permite que atacantes remotos lean datos secretos de la memoria de proceso si la directiva Limit se puede establecer en un archivo .htaccess del usuario o si existen ciertos errores de configuraci\u00f3n en httpd.conf. Esto tambi\u00e9n se conoce como Optionsbleed. Esta vulnerabilidad afecta a Apache HTTP Server hasta la versi\u00f3n 2.2.34 y a las versiones 2.4.x hasta la 2.4.27. El atacante env\u00eda una petici\u00f3n HTTP OPTIONS sin autenticar cuando intenta leer datos secretos. Este es un problema de uso de memoria previamente liberada y, por lo tanto, los datos secretos no siempre se env\u00edan y los datos espec\u00edficos dependen de muchos factores, entre los que se encuentra la configuraci\u00f3n. La explotaci\u00f3n con .htaccess puede bloquearse con un parche en la funci\u00f3n ap_limit_section en 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Party Advisory\"]},{\"url\":\"https://security.gentoo.org/glsa/201710-32\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://security.netapp.com/advisory/ntap-20180601-0003/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://support.apple.com/HT208331\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US\u0026docId=emr_na-hpesbux03909en_us\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://svn.apache.org/viewvc/httpd/httpd/branches/2.4.x/server/core.c?r1=1805223\u0026r2=1807754\u0026pathrev=1807754\u0026view=patch\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Vendor Advisory\"]},{\"url\":\"https://www.exploit-db.com/exploits/42745/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Exploit\",\"Third Party Advisory\",\"VDB Entry\"]},{\"url\":\"https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\",\"Third Party Advisory\"]},{\"url\":\"https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\",\"Third Party Advisory\"]},{\"url\":\"https://www.tenable.com/security/tns-2019-09\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\"]}]}}"
  }
}


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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.