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.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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.
    (CVE-2018-6794)

Note that Nessus relies on the presence of the package as reported by the vendor.

Several issues were found in suricata, an intrusion detection and prevention tool.

CVE-2017-7177

Suricata has an IPv4 defragmentation evasion issue caused by lack of a check for the IP protocol during fragment matching.

CVE-2017-15377

It was possible to trigger lots of redundant checks on the content of crafted network traffic with a certain signature, because of DetectEngineContentInspection in detect-engine-content-inspection.c.
The search engine doesn't stop when it should after no match is found;
instead, it stops only upon reaching inspection-recursion- limit (3000 by default).

CVE-2018-6794

Suricata 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.

TEMP-0856648-2BC2C9 (no CVE assigned yet)

Out of bounds read in app-layer-dns-common.c. On a zero size A or AAAA record, 4 or 16 bytes would still be read.

For Debian 8 'Jessie', these problems have been fixed in version 2.0.7-2+deb8u3.

We recommend that you upgrade your suricata packages.

NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

fixes bz#1543250 and bz#1543251

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website.
Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	Name	Product	Family	Severity
259888	Linux Distros Unpatched Vulnerability : CVE-2018-6794	Nessus	Misc.	medium
119425	Debian DLA-1603-1 : suricata security update	Nessus	Debian Local Security Checks	high
106992	Fedora 27 : suricata (2018-ee417c4b28)	Nessus	Fedora Local Security Checks	medium

Detections

Analytics

CVE-2018-6794

medium

Tenable Plugins

medium

high

medium