Vulnerability in Linux Kernel
CVE-2019-18625
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.017 (77.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 77th percentile — 77.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.017 · newest: 0.017 · change: 0.000
Affected products
- Linux Kernel
- Microsoft Windows
- Oisf Suricata — versions 5.0.0
- Debian Linux — versions 8.0
References
- redmine.openinfosecfoundation.org/issues/3286 (Third Party Advisory)
- github.com/OISF/suricata/commit/9f0294fadca3dcc18c919424242a41e01f3e8318 (Patch, Third Party Advisory)
- redmine.openinfosecfoundation.org/issues/3395 (Third Party Advisory)
- github.com/OISF/suricata/commit/ea0659de7640cf6a51de5bbd1dbbb0414e4623a0 (Patch, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2020/01/msg00032.html (mailing-list, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2019-18625?
- CVE-2019-18625 is a high-severity vulnerability in Linux Kernel. CVSS score: 7.5/10. Published 2020-01-06.
- How severe is CVE-2019-18625?
- High severity. CVSS v3 base score is 7.5 out of 10.