#VU35480 Out-of-bounds read in Suricata - CVE-2019-16411
Published: September 24, 2019 / Updated: August 8, 2020
Vulnerability identifier: #VU35480
Vulnerability risk: High
CVSSv4.0: 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
CVE-ID: CVE-2019-16411
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Suricata
Suricata
Software vendor:
Open Information Security Foundation
Open Information Security Foundation
Description
The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.
An issue was discovered in Suricata 4.1.4. By sending multiple IPv4 packets that have invalid IPv4Options, the function IPV4OptValidateTimestamp in decode-ipv4.c tries to access a memory region that is not allocated. There is a check for o->len < 5 (corresponding to 2 bytes of header and 3 bytes of data). Then, "flag = *(o->data + 3)" places one beyond the 3 bytes, because the code should have been "flag = *(o->data + 1)" instead.
Remediation
Install update from vendor's website.