Improper Verification of Cryptographic Signature in Suricata

1) Improper Verification of Cryptographic Signature

EUVDB-ID: #VU35700

Risk: Medium

CVSSv4.0: 6.6 [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:U/U:Green]

CVE-ID: CVE-2019-1010279

CWE-ID: CWE-347 - Improper Verification of Cryptographic Signature

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

Open Information Security Foundation Suricata prior to version 4.1.3 is affected by: Denial of Service - TCP/HTTP detection bypass. The impact is: An attacker can evade a signature detection with a specialy formed sequence of network packets. The component is: detect.c (https://github.com/OISF/suricata/pull/3625/commits/d8634daf74c882356659addb65fb142b738a186b). The attack vector is: An attacker can trigger the vulnerability by a specifically crafted network TCP session. The fixed version is: 4.1.3.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Suricata: 4.1.0

CPE2.3

• cpe:2.3:a:oisf:suricata:4.1.0:*:*:*:*:*:*:*

External links

https://github.com/OISF/suricata/pull/3625
https://github.com/OISF/suricata/pull/3625/commits/d8634daf74c882356659addb65fb142b738a186b
https://redmine.openinfosecfoundation.org/issues/2770

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.