SB2019051311 - Multiple vulnerabilities in Suricata

Description

This security bulletin contains information about 2 vulnerabilities.

1) Integer underflow (CVE-ID: CVE-2019-10053)

CWE-ID: CWE-191 - Integer underflow

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

An issue was discovered in Suricata 4.1.x before 4.1.4. If the input of the function SSHParseBanner is composed only of a character, then the program runs into a heap-based buffer over-read. This occurs because the erroneous search for results in an integer underflow.

2) Out-of-bounds read (CVE-ID: CVE-2019-10050)

CWE-ID: CWE-125 - Out-of-bounds read

CVSSv4: 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

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

The vulnerability exists due to length of 2 bytes. There is no validation of this length. Later on, the code tries to read at an empty position, leading to a crash. A remote attacker can perform a denial of service attack.

Remediation

Install update from vendor's website.

References

• https://lists.openinfosecfoundation.org/pipermail/oisf-announce/
• https://suricata-ids.org/2019/04/30/suricata-4-1-4-released/