Vulnerability Monitor

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CVE-2018-6794

Suricata before 4.0.4 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.

Published

2018-02-07T05:29:00.260

Last Modified

2024-11-21T04:11:12.810

Status

Modified

Source

[email protected]

Severity

CVSSv3.0: 5.3 (MEDIUM)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:N/I:P/A:N

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: PARTIAL
Availability Impact: NONE

Exploitability Score

10.0

Impact Score

2.9

Weaknesses

Type: Primary
CWE-693

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	suricata-ids	suricata	< 4.0.4	Yes
Operating System	debian	debian_linux	8.0	Yes

References

https://github.com/OISF/suricata/pull/3202/commits/e1ef57c848bbe4e567d5d4b66d346a742e3f77a1 Patch, Third Party Advisory ([email protected])
https://lists.debian.org/debian-lts-announce/2018/12/msg00000.html Mailing List, Third Party Advisory ([email protected])
https://redmine.openinfosecfoundation.org/issues/2427 Third Party Advisory ([email protected])
https://suricata-ids.org/2018/02/14/suricata-4-0-4-available/ Vendor Advisory ([email protected])
https://www.exploit-db.com/exploits/44247/ Exploit, Third Party Advisory, VDB Entry ([email protected])
https://github.com/OISF/suricata/pull/3202/commits/e1ef57c848bbe4e567d5d4b66d346a742e3f77a1 Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://lists.debian.org/debian-lts-announce/2018/12/msg00000.html Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://redmine.openinfosecfoundation.org/issues/2427 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://suricata-ids.org/2018/02/14/suricata-4-0-4-available/ Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.exploit-db.com/exploits/44247/ Exploit, Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)