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CVE-2019-18625

Published: Jan 6, 2020

Modified: Aug 5, 2024

PUBLISHED

Description

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.

Vendor	Product	Versions
n/a	n/a	affected `n/a`

References

https://redmine.openinfosecfoundation.org/issues/3286

x_refsource_MISC

https://github.com/OISF/suricata/commit/9f0294fadca3dcc18c919424242a41e01f3e8318

x_refsource_CONFIRM

https://redmine.openinfosecfoundation.org/issues/3395

x_refsource_MISC

https://github.com/OISF/suricata/commit/ea0659de7640cf6a51de5bbd1dbbb0414e4623a0

x_refsource_CONFIRM

[debian-lts-announce] 20200130 [SECURITY] [DLA 2087-1] suricata security update

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x_refsource_MLIST

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