Denial of service in Suricata



Risk High
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2018-18956
CWE-ID CWE-20
Exploitation vector Network
Public exploit This vulnerability is being exploited in the wild.
Vulnerable software
 Suricata
Server applications / IDS/IPS systems, Firewalls and proxy servers

Vendor Open Information Security Foundation

Security Bulletin

This security bulletin contains one high risk vulnerability.

1) Segmentation fault

EUVDB-ID: #VU15746

Risk: High

CVSSv4.0: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:A/U:Amber]

CVE-ID: CVE-2018-18956

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The weakness exists due to segmentation fault in the ProcessMimeEntity function in util-decode-mime.c when handling malicious input. A remote attacker can supply specially crafted input to the SMTP parser, trigger segfault and cause daemon crash.

Note: according to MITRE statement, the vulnerability has been exploited in the wild in November 2018.

Mitigation

Update to version 4.1.

Vulnerable software versions

Suricata: 4.0.0 - 4.0.5

CPE2.3 External links

https://suricata-ids.org/2018/11/06/suricata-4-1-released/
https://github.com/OISF/suricata/commit/36e84b929cb37bd03943ed14749a4fef3ff1f61d


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?

Yes. This vulnerability is being exploited in the wild.



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