SB2019051311 - Multiple vulnerabilities in Suricata

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

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

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)

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/