Login Request a demo
High severity · published Dec 5, 2016
CVE-2016-8740
The mod_http2 module in the Apache HTTP Server 2.4.17 through 2.4.23, when the Protocols configuration includes h2 or h2c, does not restrict request-header length, which allows…
7.5
CVSS
79.1%
EPSS
No
On KEV
Description
The mod_http2 module in the Apache HTTP Server 2.4.17 through 2.4.23, when the Protocols configuration includes h2 or h2c, does not restrict request-header length, which allows remote attackers to cause a denial of service (memory consumption) via crafted CONTINUATION frames in an HTTP/2 request.
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)79.1% · higher than 100% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
HS
HTTP Server · Apache
2.4.17; 2.4.18; 2.4.19; 2.4.20; 2.4.21; 2.4.22; +1 more · source: NVD
Affected product
HS
HTTP Server
Apache
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2016-8740
CVE.org
https://www.cve.org/CVERecord?id=CVE-2016-8740
Exploit
http://packetstormsecurity.com/files/140023/Apache-HTTPD-Web-Server-2.4.23-Memory-Exhaustion.html
rhn.redhat.com
http://rhn.redhat.com/errata/RHSA-2017-1415.html
Third Party Advisory
http://www.securityfocus.com/bid/94650
Third Party Advisory
http://www.securitytracker.com/id/1037388
access.redhat.com
https://access.redhat.com/errata/RHSA-2017:1161
access.redhat.com
https://access.redhat.com/errata/RHSA-2017:1413
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