[SECURITY] [DLA 1603-1] suricata security update
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Package : suricata
Version : 2.0.7-2+deb8u3
CVE ID : CVE-2017-7177 CVE-2017-15377 CVE-2018-6794
Debian Bug : 856648 889842 856649
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.
Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS
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