Vulnerability CVE-2019-9516


Published: 2019-08-13

Description:
Some HTTP/2 implementations are vulnerable to a header leak, potentially leading to a denial of service. The attacker sends a stream of headers with a 0-length header name and 0-length header value, optionally Huffman encoded into 1-byte or greater headers. Some implementations allocate memory for these headers and keep the allocation alive until the session dies. This can consume excess memory.

Type:

CWE-400

(Uncontrolled Resource Consumption ('Resource Exhaustion'))

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
Affected software
Synology -> Diskstation manager 
Synology -> Skynas 
Synology -> Vs960hd firmware 
Fedoraproject -> Fedora 
Debian -> Debian linux 
Canonical -> Ubuntu linux 
Apple -> Swiftnio 
Apache -> Traffic server 

 References:
http://seclists.org/fulldisclosure/2019/Aug/16
https://github.com/Netflix/security-bulletins/blob/master/advisories/third-party/2019-002.md
https://kb.cert.org/vuls/id/605641/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4ZQGHE3WTYLYAYJEIDJVF2FIGQTAYPMC/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/BP556LEG3WENHZI5TAQ6ZEBFTJB4E2IS/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/CMNFX5MNYRWWIMO4BTKYQCGUDMHO3AXP/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TAZZEVTCN2B4WT6AIBJ7XGYJMBTORJU5/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XHTKU7YQ5EEP2XNSAV4M4VJ7QCBOJMOD/
https://seclists.org/bugtraq/2019/Aug/24
https://seclists.org/bugtraq/2019/Aug/40
https://security.netapp.com/advisory/ntap-20190823-0002/
https://security.netapp.com/advisory/ntap-20190823-0005/
https://support.f5.com/csp/article/K02591030
https://usn.ubuntu.com/4099-1/
https://www.debian.org/security/2019/dsa-4505
https://www.synology.com/security/advisory/Synology_SA_19_33

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