Vulnerability CVE-2019-9517


Published: 2019-08-13

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.

Type:

CWE-400

(Uncontrolled Resource Consumption ('Resource Exhaustion'))

Vendor: Apache
Product: Traffic server 
Version:
8.0.3
8.0.2
8.0.1
8.0.0
7.1.5
7.1.4
7.1.3
7.1.2
7.1.1
7.1.0
7.0.0
6.2.3
6.2.2
6.2.1
6.2.0
6.1.1
6.1.0
6.0.3
6.0.0
Vendor: Apple
Product: Swiftnio 
Version:
1.4.0
1.3.2
1.3.1
1.3.0
1.2.2
1.2.1
1.2.0
1.1.1
1.1.0
1.0.1
1.0.0

CVSS2 => (AV:N/AC:L/Au:N/C:N/I:N/A:C)

CVSS Base Score
Impact Subscore
Exploitability Subscore
7.8/10
6.9/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
None
None
Complete

 References:
http://www.openwall.com/lists/oss-security/2019/08/15/7
https://github.com/Netflix/security-bulletins/blob/master/advisories/third-party/2019-002.md
https://kb.cert.org/vuls/id/605641/
https://lists.apache.org/thread.html/4610762456644181b267c846423b3a990bd4aaea1886ecc7d51febdb@%3Cannounce.httpd.apache.org%3E
https://lists.apache.org/thread.html/56c2e7cc9deb1c12a843d0dc251ea7fd3e7e80293cde02fcd65286ba@%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/d89f999e26dfb1d50f247ead1fe8538014eb412b2dbe5be4b1a9ef50@%3Cdev.httpd.apache.org%3E
https://lists.apache.org/thread.html/ec97fdfc1a859266e56fef084353a34e0a0b08901b3c1aa317a43c8c@%3Cdev.httpd.apache.org%3E
https://support.f5.com/csp/article/K02591030
https://www.synology.com/security/advisory/Synology_SA_19_33

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