Vulnerability Details : CVE-2017-9789
When under stress, closing many connections, the HTTP/2 handling code in Apache httpd 2.4.26 would sometimes access memory after it has been freed, resulting in potentially erratic behaviour.
Threat overview for CVE-2017-9789
Top countries where our scanners detected CVE-2017-9789
Top open port discovered on systems with this issue
80
IPs affected by CVE-2017-9789 5,827
Threat actors abusing to this issue?
Yes
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affected by CVE-2017-9789!
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Exploit prediction scoring system (EPSS) score for CVE-2017-9789
Probability of exploitation activity in the next 30 days: 3.76%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 91 % EPSS Score History EPSS FAQ
CVSS scores for CVE-2017-9789
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source |
|---|---|---|---|---|---|
|
5.0
|
MEDIUM | AV:N/AC:L/Au:N/C:N/I:N/A:P |
10.0
|
2.9
|
NIST |
|
7.5
|
HIGH | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
3.9
|
3.6
|
NIST |
CWE ids for CVE-2017-9789
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Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code.Assigned by: nvd@nist.gov (Primary)
References for CVE-2017-9789
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http://www.securityfocus.com/bid/99568
Apache HTTP Server CVE-2017-9789 Denial of Service VulnerabilityThird Party Advisory;VDB Entry
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https://security.netapp.com/advisory/ntap-20170911-0002/
July 2017 Apache httpd Server Vulnerabilities in Multiple NetApp Products | NetApp Product Security
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https://lists.apache.org/thread.html/re3d27b6250aa8548b8845d314bb8a350b3df326cacbbfdfe4d455234@%3Ccvs.httpd.apache.org%3E
Pony Mail!
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https://lists.apache.org/thread.html/rd18c3c43602e66f9cdcf09f1de233804975b9572b0456cc582390b6f@%3Ccvs.httpd.apache.org%3E
Pony Mail!
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https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03908en_us
HPESBUX03908 rev.1 - HP-UX Web Server Suite running Apache on HP-UX 11iv3, Multiple Remote Vulnerabilities.
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https://httpd.apache.org/security/vulnerabilities_24.html
httpd 2.4 vulnerabilities - The Apache HTTP Server ProjectRelease Notes;Vendor Advisory
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https://lists.apache.org/thread.html/rfcf929bd33a6833e3f0c35eebdad70d5060665f9c4e17ea467c66770@%3Ccvs.httpd.apache.org%3E
svn commit: r1888194 [11/13] - /httpd/site/trunk/content/security/json/ - Pony Mail
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https://lists.apache.org/thread.html/rc998b18880df98bafaade071346690c2bc1444adaa1a1ea464b93f0a@%3Ccvs.httpd.apache.org%3E
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 s
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https://lists.apache.org/thread.html/r15f9aa4427581a1aecb4063f1b4b983511ae1c9935e2a0a6876dad3c@%3Ccvs.httpd.apache.org%3E
svn commit: r1073139 [11/13] - in /websites/staging/httpd/trunk/content: ./ security/json/ - Pony Mail
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https://lists.apache.org/thread.html/r9f93cf6dde308d42a9c807784e8102600d0397f5f834890708bf6920@%3Ccvs.httpd.apache.org%3E
svn commit: r1073149 [1/13] - in /websites/staging/httpd/trunk/content: ./ security/ security/json/ - Pony Mail
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https://lists.apache.org/thread.html/r476d175be0aaf4a17680ef98c5153b4d336eaef76fb2224cc94c463a@%3Ccvs.httpd.apache.org%3E
svn commit: r1075467 [2/2] - in /websites/staging/httpd/trunk/content: ./ security/json/CVE-2021-31618.json security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_2
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https://lists.apache.org/thread.html/rd336919f655b7ff309385e34a143e41c503e133da80414485b3abcc9@%3Ccvs.httpd.apache.org%3E
svn commit: r1075360 [3/3] - in /websites/staging/httpd/trunk/content: ./ security/json/CVE-2021-31618.json security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_2
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https://lists.apache.org/thread.html/84a3714f0878781f6ed84473d1a503d2cc382277e100450209231830@%3Ccvs.httpd.apache.org%3E
Pony Mail!
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https://support.apple.com/HT208221
About the security content of macOS High Sierra 10.13.1, Security Update 2017-001 Sierra, and Security Update 2017-004 El Capitan - Apple Support
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https://lists.apache.org/thread.html/56c2e7cc9deb1c12a843d0dc251ea7fd3e7e80293cde02fcd65286ba@%3Ccvs.httpd.apache.org%3E
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_
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https://lists.apache.org/thread.html/r6521a7f62276340eabdb3339b2aa9a38c5f59d978497a1f794af53be@%3Ccvs.httpd.apache.org%3E
Pony Mail!
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https://lists.apache.org/thread.html/rf6449464fd8b7437704c55f88361b66f12d5b5f90bcce66af4be4ba9@%3Ccvs.httpd.apache.org%3E
Pony Mail!
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https://lists.apache.org/thread.html/rcc44594d4d6579b90deccd4536b5d31f099ef563df39b094be286b9e@%3Ccvs.httpd.apache.org%3E
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
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http://www.securitytracker.com/id/1038907
Apache mod_http2 Memory Access Error Lets Remote Users Deny Service - SecurityTrackerThird Party Advisory;VDB Entry
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https://lists.apache.org/thread.html/r76142b8c5119df2178be7c2dba88fde552eedeec37ea993dfce68d1d@%3Ccvs.httpd.apache.org%3E
svn commit: r1075470 [4/4] - in /websites/staging/httpd/trunk/content: ./ security/json/CVE-2020-13938.json security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_2
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https://security.gentoo.org/glsa/201710-32
Apache: Multiple vulnerabilities (GLSA 201710-32) — Gentoo security
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https://lists.apache.org/thread.html/9d0098775bd83cf7c33ac5a077ef412c14ce939198921e639c734e20@%3Cannounce.httpd.apache.org%3E
CVE-2017-9789: Apache httpd 2.4 Read after free in mod_http2 - Pony MailMailing List;Vendor Advisory
Products affected by CVE-2017-9789
- cpe:2.3:a:apache:http_server:2.4.26:*:*:*:*:*:*:*