Bug 1543249 (CVE-2018-6794) - CVE-2018-6794 suricata: HTTP detection bypass in detect.c and stream-tcp.c
Summary: CVE-2018-6794 suricata: HTTP detection bypass in detect.c and stream-tcp.c
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2018-6794
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1543250 1543251
Blocks:
TreeView+ depends on / blocked
 
Reported: 2018-02-08 05:17 UTC by Sam Fowler
Modified: 2019-09-29 14:32 UTC (History)
4 users (show)

Fixed In Version: suricata 4.1
Clone Of:
Environment:
Last Closed: 2018-09-17 23:04:59 UTC
Embargoed:

Attachments (Terms of Use)

Description Sam Fowler 2018-02-08 05:17:55 UTC 
Suricata before 4.1 is prone to an HTTP detection bypass vulnerability in detect.c and stream-tcp.c. If a malicious server breaks a normal TCP flow and sends data before the 3-way handshake is complete, then the data sent by the malicious server will be accepted by web clients such as a web browser or Linux CLI utilities, but ignored by Suricata IDS signatures. This mostly affects IDS signatures for the HTTP protocol and TCP stream content; signatures for TCP packets will inspect such network traffic as usual.


Upstream Bug:

https://redmine.openinfosecfoundation.org/issues/2427


Upstream Commit:

https://github.com/OISF/suricata/pull/3202/commits/e1ef57c848bbe4e567d5d4b66d346a742e3f77a1
Comment 1 Sam Fowler 2018-02-08 05:18:15 UTC 
Created suricata tracking bugs for this issue:

Affects: epel-all [bug 1543251]
Affects: fedora-all [bug 1543250]
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