High severity · published Aug 13, 2019
CVE-2019-9517
Some HTTP/2 implementations are vulnerable to unconstrained interal data buffering, potentially leading to a denial of service
7.5
CVSS
27.9%
EPSS
No
On KEV
Description
Some HTTP/2 implementations are vulnerable to unconstrained interal data buffering, potentially leading to a denial of service. The attacker opens the HTTP/2 window so the peer can send without constraint; however, they leave the TCP window closed so the peer cannot actually write (many of) the bytes on the wire. The attacker then sends a stream of requests for a large response object. Depending on how the servers queue the responses, this can consume excess memory, CPU, or both.
CVSS vector
CVSS:3.1/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)27.9% · higher than 98% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
HS
HTTP Server · Apache
2.4.20 before 2.4.40 · source: NVD
CD
Clustered Data Ontap · Netapp
All versions, or not specified · source: NVD
CE
Communications Element Manager · Oracle
8.0.0; 8.1.0; 8.1.1; 8.2.0 · source: NVD
DL
Debian Linux · Debian
9.0; 10.0 · source: NVD
DM
Diskstation Manager · Synology
6.2 · source: NVD
EL
Enterprise Linux · Redhat
8.0 · source: NVD
FE
Fedora · Fedoraproject
29; 30 · source: NVD
GR
Graalvm · Oracle
19.2.0 · source: NVD
IE
Instantis Enterprisetrack · Oracle
17.1 through 17.3 · source: NVD
JC
Jboss Core Services · Redhat
1.0 · source: NVD
JE
Jboss Enterprise Application Platform · Redhat
7.2.0; 7.3.0 · source: NVD
LE
Leap · Opensuse
15.0; 15.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-9517
CVE.org
https://www.cve.org/CVERecord?id=CVE-2019-9517
Mailing List
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00004.html
Mailing List
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00031.html
Mailing List
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00032.html
Mailing List
http://www.openwall.com/lists/oss-security/2019/08/15/7
Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:2893
Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:2925
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