CVE-2018-6794
What it is
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.
At a glance
- Exploitability
- Can be exploited over the network without logging in. Limited direct impact.
- Exploit odds
- 23.7% chance of exploitation in the next 30 days (EPSS). Higher than most.
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 23.7% in the next 30 days (EPSS).
- Severity: 5.3 MEDIUM (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 23.7% · EPSS, next 30 days
- Weakness
- CWE-693
- Record status
- Modified
Affected
- suricata-ids Suricata < 4.0.4
- Debian Linux 8.0
Attack profile CVSS 3.0 · 5.3
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- Low
- Availability
- None
Raw vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2018-6794.md and follow it. Check whether this project is affected by CVE-2018-6794. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
Fix and advisories
- https://github.com/OISF/suricata/pull/3202/commits/e1ef57c848bbe4e567d5d4b66d346a742e3f77a1
- https://suricata-ids.org/2018/02/14/suricata-4-0-4-available/
- https://github.com/OISF/suricata/pull/3202/commits/e1ef57c848bbe4e567d5d4b66d346a742e3f77a1
- https://suricata-ids.org/2018/02/14/suricata-4-0-4-available/
References
- https://github.com/OISF/suricata/pull/3202/commits/e1ef57c848bbe4e567d5d4b66d346a742e3f77a1
- https://lists.debian.org/debian-lts-announce/2018/12/msg00000.html
- https://redmine.openinfosecfoundation.org/issues/2427
- https://suricata-ids.org/2018/02/14/suricata-4-0-4-available/
- https://www.exploit-db.com/exploits/44247/
- https://github.com/OISF/suricata/pull/3202/commits/e1ef57c848bbe4e567d5d4b66d346a742e3f77a1
- https://lists.debian.org/debian-lts-announce/2018/12/msg00000.html
- https://redmine.openinfosecfoundation.org/issues/2427
- https://suricata-ids.org/2018/02/14/suricata-4-0-4-available/
- https://www.exploit-db.com/exploits/44247/