CVE-2019-18625 Affecting suricata package, versions [0,4.1.6)[5.0.0,5.0.1)


Severity

Recommended
0.0
high
0
10

CVSS assessment by Snyk's Security Team. Learn more

Threat Intelligence

EPSS
0.25% (49th percentile)

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  • Snyk IDSNYK-UNMANAGED-SURICATA-2384335
  • published26 Jan 2022
  • disclosed6 Jan 2020
  • creditUnknown

Introduced: 6 Jan 2020

CVE-2019-18625  (opens in a new tab)

How to fix?

Upgrade suricata to version 4.1.6, 5.0.1 or higher.

Overview

An issue was discovered in Suricata 5.0.0. It was possible to bypass/evade any tcp based signature by faking a closed TCP session using an evil server. After the TCP SYN packet, it is possible to inject a RST ACK and a FIN ACK packet with a bad TCP Timestamp option. The client will ignore the RST ACK and the FIN ACK packets because of the bad TCP Timestamp option. Both linux and windows client are ignoring the injected packets.

CVSS Base Scores

version 3.1