Description
Some HTTP/2 implementations are vulnerable to a flood of empty frames, potentially leading to a denial of service. The attacker sends a stream of frames with an empty payload and without the end-of-stream flag. These frames can be DATA, HEADERS, CONTINUATION and/or PUSH_PROMISE. The peer spends time processing each frame disproportionate to attack bandwidth. This can consume excess CPU.
No summary for this CVE yet.
CVSS Vector Breakdown
Exploitability
AV:NAttack VectorNetwork
AC:LAttack ComplexityLow
PR:NPrivileges RequiredNone
UI:NUser InteractionNone
Scope
S:UScopeUnchanged
Impact
C:NConfidentialityNone
I:NIntegrityNone
A:HAvailabilityHigh
Weaknesses
Affected Products
redhat
commercial·USaka red hat
Microsoft Corp
commercial·USaka microsoft corporation
synology
commercial·USaka router manager, diskstation manager (dsm)
Apple Inc.
commercial·USaka apple, apple computer
apache
oss-project·USaka apache http server, apache httpd
and 21 more affected products View all →
Exploitability
Official Patch Available
Attack Graph
Products CVE Techniques Tactics
Click technique nodes for MITRE ATT&CK details · drag to pan · Ctrl/⌘ + scroll to zoom, or go fullscreen.
MITRE ATT&CK
1 technique Impact
References
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00031.html
lists.opensuse.org
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00032.html
lists.opensuse.org
http://seclists.org/fulldisclosure/2019/Aug/16
seclists.org
and 33 more references View all →
News mentions
Could not load news mentions.
Unlock Complete Vulnerability Intelligence
Get the full picture for CVE-2019-9518 and every CVE in our database. Create a free account — no credit card required.
Create Free AccountPlain-language analysis
Impact assessment and exploitation scenario in plain English
Attack graph visualization
Interactive attack path and kill chain mapping
Exploit details & PoC links
ExploitDB, Metasploit, GitHub PoCs with direct links
Nuclei scanner templates
Ready-to-use vulnerability scanner templates
Full remediation guide
Patch instructions, workarounds, and compliance impact
Interactive AI chat
Ask questions about this vulnerability in natural language
Related vulnerabilities
Semantically similar CVEs and attack patterns
REST API & MCP access
Integrate vulnerability data into your workflows
