// For flags

CVE-2017-7668

httpd: ap_find_token() buffer overread

Severity Score

7.5
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

The HTTP strict parsing changes added in Apache httpd 2.2.32 and 2.4.24 introduced a bug in token list parsing, which allows ap_find_token() to search past the end of its input string. By maliciously crafting a sequence of request headers, an attacker may be able to cause a segmentation fault, or to force ap_find_token() to return an incorrect value.

Los cambios en el análisis sintáctico estricto de HTTP añadidos en las versiones 2.2.32 y 2.4.24 de Apache httpd introdujeron un error en el análisis de listas de tokens. Esto permite que ap_find_token() busque más allá del final de la cadena de entrada. Un atacante puede conseguir causar un fallo de segmentación o forzar a que ap_find_token() devuelva un valor incorrecto mediante la manipulación de una secuencia de cabeceras de peticiones con fines maliciosos.

A buffer over-read flaw was found in the httpd's ap_find_token() function. A remote attacker could use this flaw to cause httpd child process to crash via a specially crafted HTTP request.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
High
Attack Vector
Network
Attack Complexity
Low
Authentication
None
Confidentiality
None
Integrity
None
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2017-04-11 CVE Reserved
  • 2017-06-20 CVE Published
  • 2024-02-08 EPSS Updated
  • 2024-08-05 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-122: Heap-based Buffer Overflow
  • CWE-125: Out-of-bounds Read
  • CWE-126: Buffer Over-read
CAPEC
References (37)
URL Tag Source
http://www.securityfocus.com/bid/99137 Third Party Advisory
http://www.securitytracker.com/id/1038711 Third Party Advisory
https://lists.apache.org/thread.html/55a068b6a5eec0b3198ae7d96a7cb412352d0ffa7716612c5af3745b%40%3Cdev.httpd.apache.org%3E Mailing List
https://lists.apache.org/thread.html/56c2e7cc9deb1c12a843d0dc251ea7fd3e7e80293cde02fcd65286ba%40%3Ccvs.httpd.apache.org%3E Mailing List
https://lists.apache.org/thread.html/84a3714f0878781f6ed84473d1a503d2cc382277e100450209231830%40%3Ccvs.httpd.apache.org%3E Mailing List
https://lists.apache.org/thread.html/8d63cb8e9100f28a99429b4328e4e7cebce861d5772ac9863ba2ae6f%40%3Ccvs.httpd.apache.org%3E Mailing List
https://lists.apache.org/thread.html/f7f95ac1cd9895db2714fa3ebaa0b94d0c6df360f742a40951384a53%40%3Ccvs.httpd.apache.org%3E Mailing List
https://lists.apache.org/thread.html/r15f9aa4427581a1aecb4063f1b4b983511ae1c9935e2a0a6876dad3c%40%3Ccvs.httpd.apache.org%3E Mailing List
https://lists.apache.org/thread.html/r476d175be0aaf4a17680ef98c5153b4d336eaef76fb2224cc94c463a%40%3Ccvs.httpd.apache.org%3E Mailing List
https://lists.apache.org/thread.html/r57608dc51b79102f3952ae06f54d5277b649c86d6533dcd6a7d201f7%40%3Ccvs.httpd.apache.org%3E Mailing List
https://lists.apache.org/thread.html/r6521a7f62276340eabdb3339b2aa9a38c5f59d978497a1f794af53be%40%3Ccvs.httpd.apache.org%3E Mailing List
https://lists.apache.org/thread.html/r75cbe9ea3e2114e4271bbeca7aff96117b50c1b6eb7c4772b0337c1f%40%3Ccvs.httpd.apache.org%3E Mailing List
https://lists.apache.org/thread.html/r9ea3538f229874c80a10af473856a81fbf5f694cd7f471cc679ba70b%40%3Ccvs.httpd.apache.org%3E Mailing List
https://lists.apache.org/thread.html/r9f93cf6dde308d42a9c807784e8102600d0397f5f834890708bf6920%40%3Ccvs.httpd.apache.org%3E Mailing List
https://lists.apache.org/thread.html/rad01d817195e6cc871cb1d73b207ca326379a20a6e7f30febaf56d24%40%3Ccvs.httpd.apache.org%3E Mailing List
https://lists.apache.org/thread.html/rc998b18880df98bafaade071346690c2bc1444adaa1a1ea464b93f0a%40%3Ccvs.httpd.apache.org%3E Mailing List
https://lists.apache.org/thread.html/rcc44594d4d6579b90deccd4536b5d31f099ef563df39b094be286b9e%40%3Ccvs.httpd.apache.org%3E Mailing List
https://lists.apache.org/thread.html/rd18c3c43602e66f9cdcf09f1de233804975b9572b0456cc582390b6f%40%3Ccvs.httpd.apache.org%3E Mailing List
https://lists.apache.org/thread.html/rdca61ae990660bacb682295f2a09d34612b7bb5f457577fe17f4d064%40%3Ccvs.httpd.apache.org%3E Mailing List
https://lists.apache.org/thread.html/re3d27b6250aa8548b8845d314bb8a350b3df326cacbbfdfe4d455234%40%3Ccvs.httpd.apache.org%3E Mailing List
https://lists.apache.org/thread.html/rf6449464fd8b7437704c55f88361b66f12d5b5f90bcce66af4be4ba9%40%3Ccvs.httpd.apache.org%3E Mailing List
https://lists.apache.org/thread.html/rfbaf647d52c1cb843e726a0933f156366a806cead84fbd430951591b%40%3Ccvs.httpd.apache.org%3E Mailing List
https://lists.apache.org/thread.html/rfcf929bd33a6833e3f0c35eebdad70d5060665f9c4e17ea467c66770%40%3Ccvs.httpd.apache.org%3E Mailing List
https://security.netapp.com/advisory/ntap-20180601-0002 Third Party Advisory
https://support.apple.com/HT208221 Third Party Advisory
https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03821en_us Third Party Advisory
https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03908en_us Third Party Advisory
https://www.tenable.com/security/tns-2019-09 Third Party Advisory
URL Date SRC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Apache
Search vendor "Apache"
Http Server
Search vendor "Apache" for product "Http Server"
2.2.32
Search vendor "Apache" for product "Http Server" and version "2.2.32"
-
Affected
Apache
Search vendor "Apache"
Http Server
Search vendor "Apache" for product "Http Server"
2.4.24
Search vendor "Apache" for product "Http Server" and version "2.4.24"
-
Affected
Apache
Search vendor "Apache"
Http Server
Search vendor "Apache" for product "Http Server"
2.4.25
Search vendor "Apache" for product "Http Server" and version "2.4.25"
-
Affected
Netapp
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Clustered Data Ontap
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--
Affected
Netapp
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Oncommand Unified Manager
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-7-mode
Affected
Netapp
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Storagegrid
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--
Affected
Redhat
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Enterprise Linux Desktop
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7.0
Search vendor "Redhat" for product "Enterprise Linux Desktop" and version "7.0"
-
Affected
Redhat
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Enterprise Linux Eus
Search vendor "Redhat" for product "Enterprise Linux Eus"
7.2
Search vendor "Redhat" for product "Enterprise Linux Eus" and version "7.2"
-
Affected
Redhat
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Enterprise Linux Eus
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7.3
Search vendor "Redhat" for product "Enterprise Linux Eus" and version "7.3"
-
Affected
Redhat
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Enterprise Linux Eus
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7.4
Search vendor "Redhat" for product "Enterprise Linux Eus" and version "7.4"
-
Affected
Redhat
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Enterprise Linux Eus
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7.5
Search vendor "Redhat" for product "Enterprise Linux Eus" and version "7.5"
-
Affected
Redhat
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Enterprise Linux Eus
Search vendor "Redhat" for product "Enterprise Linux Eus"
7.6
Search vendor "Redhat" for product "Enterprise Linux Eus" and version "7.6"
-
Affected
Redhat
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Enterprise Linux Eus
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7.7
Search vendor "Redhat" for product "Enterprise Linux Eus" and version "7.7"
-
Affected
Redhat
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Enterprise Linux Server
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7.0
Search vendor "Redhat" for product "Enterprise Linux Server" and version "7.0"
-
Affected
Redhat
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Enterprise Linux Server Aus
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7.2
Search vendor "Redhat" for product "Enterprise Linux Server Aus" and version "7.2"
-
Affected
Redhat
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Enterprise Linux Server Aus
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7.3
Search vendor "Redhat" for product "Enterprise Linux Server Aus" and version "7.3"
-
Affected
Redhat
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Enterprise Linux Server Aus
Search vendor "Redhat" for product "Enterprise Linux Server Aus"
7.4
Search vendor "Redhat" for product "Enterprise Linux Server Aus" and version "7.4"
-
Affected
Redhat
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Enterprise Linux Server Aus
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7.6
Search vendor "Redhat" for product "Enterprise Linux Server Aus" and version "7.6"
-
Affected
Redhat
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Enterprise Linux Server Aus
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7.7
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-
Affected
Redhat
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Enterprise Linux Server Tus
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7.2
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-
Affected
Redhat
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Enterprise Linux Server Tus
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7.3
Search vendor "Redhat" for product "Enterprise Linux Server Tus" and version "7.3"
-
Affected
Redhat
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Enterprise Linux Server Tus
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7.4
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-
Affected
Redhat
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Enterprise Linux Server Tus
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7.6
Search vendor "Redhat" for product "Enterprise Linux Server Tus" and version "7.6"
-
Affected
Redhat
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Enterprise Linux Server Tus
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7.7
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-
Affected
Redhat
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Enterprise Linux Workstation
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7.0
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-
Affected
Debian
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Debian Linux
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8.0
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-
Affected
Debian
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Debian Linux
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9.0
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-
Affected
Oracle
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Secure Global Desktop
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5.3
Search vendor "Oracle" for product "Secure Global Desktop" and version "5.3"
-
Affected
Apple
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Mac Os X
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< 10.13.1
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-
Affected
Apple
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Mac Os X
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>= 10.11.0 < 10.11.6
Search vendor "Apple" for product "Mac Os X" and version " >= 10.11.0 < 10.11.6"
-
Affected
Apple
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Mac Os X
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>= 10.12.0 < 10.12.6
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-
Affected
Apple
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Mac Os X
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10.11.6
Search vendor "Apple" for product "Mac Os X" and version "10.11.6"
-
Affected
Apple
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Mac Os X
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10.11.6
Search vendor "Apple" for product "Mac Os X" and version "10.11.6"
security_update_2016-001
Affected
Apple
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Mac Os X
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10.11.6
Search vendor "Apple" for product "Mac Os X" and version "10.11.6"
security_update_2016-002
Affected
Apple
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Mac Os X
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10.11.6
Search vendor "Apple" for product "Mac Os X" and version "10.11.6"
security_update_2016-003
Affected
Apple
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Mac Os X
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10.11.6
Search vendor "Apple" for product "Mac Os X" and version "10.11.6"
security_update_2017-001
Affected
Apple
Search vendor "Apple"
Mac Os X
Search vendor "Apple" for product "Mac Os X"
10.11.6
Search vendor "Apple" for product "Mac Os X" and version "10.11.6"
security_update_2017-002
Affected
Apple
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Mac Os X
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10.11.6
Search vendor "Apple" for product "Mac Os X" and version "10.11.6"
security_update_2017-003
Affected
Apple
Search vendor "Apple"
Mac Os X
Search vendor "Apple" for product "Mac Os X"
10.12.6
Search vendor "Apple" for product "Mac Os X" and version "10.12.6"
-
Affected