Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. From 8.0.0 until 8.0.6, DNS-over-HTTP/2 processing in rust/src/http2/http2.rs retains previously processed HTTP/2 DATA frame contents instead of clearing the internal buffer. Multiple DATA frames with the EndOfStream flag set can grow the buffer to its 65 KiB limit while causing all prior contents to be processed again, producing quadratic CPU complexity, degraded packet processing, loss of monitoring visibility, or denial of service.
This issue is fixed in version 8.0.6.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
None
No data modification
Availability
High
Complete denial of service
CVSS Vector v3.1
Weakness Type (CWE)
References 5
https://github.com/OISF/suricata/commit/1731805967edf5d31448db2ae43cf72c6cf46c11
security-advisories@github.com
https://github.com/OISF/suricata/commit/26c26dea84f00de95151a0e16d21c1fcafac9648
security-advisories@github.com
https://github.com/OISF/suricata/releases/tag/suricata-8.0.6
security-advisories@github.com
https://github.com/OISF/suricata/security/advisories/GHSA-xjgq-3qw4-jp5f
security-advisories@github.com
https://redmine.openinfosecfoundation.org/issues/8725
security-advisories@github.com