Security restrictions bypass in Suricata



Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2018-6794
CWE-ID CWE-693
Exploitation vector Network
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software
 Suricata
Server applications / IDS/IPS systems, Firewalls and proxy servers

Vendor Open Information Security Foundation

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Security restrictions bypass

EUVDB-ID: #VU11123

Risk: Low

CVSSv4.0: 5.5 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/U:Clear]

CVE-ID: CVE-2018-6794

CWE-ID: CWE-693 - Protection Mechanism Failure

Exploit availability: Yes

Description

The vulnerability allows a remote unauthenticated attacker to bypass security restrictions on the target system.

The weakness exists in the detect.c and stream-tcp.c source code files due to improper security restrictions. A remote attacker can submit specially crafted data from a malicious server and bypass security restrictions.

Mitigation

Update to version 4.0.4.

Vulnerable software versions

Suricata: 4.0 - 4.0.3

CPE2.3 External links

https://github.com/OISF/suricata/pull/3202/commits/e1ef57c848bbe4e567d5d4b66d346a742e3f77a1


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.



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