Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. From 8.0.0 until 8.0.6, the HTTP/1 parser limits decompression work per transaction but does not limit how many small brotli compression bombs a single flow can submit. With response-body-decompress-layer-limit enabled, repeated compressed responses make the decompression paths in rust/htp perform expensive work for every transaction, degrading packet processing and potentially causing 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/392b6aee2971a4b5e573850f5d832112509bcb5f
security-advisories@github.com
https://github.com/OISF/suricata/commit/e369bf29ee5bbd0cdf6a98dc4a3357ba43c86a88
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-j9cx-w9xm-5x84
security-advisories@github.com
https://redmine.openinfosecfoundation.org/issues/8694
security-advisories@github.com