7.5

CVE-2019-18625: debian debian_linux

CVSS: 7.5v3.1HighModified
AliasesUBUNTU-CVE-2019-18625DEBIAN-CVE-2019-18625
Published 06-01-2020Last modified 05-08-2024
Open JSON

Vulnerability summary

CVE-2019-18625 is a high (CVSS 7.5) vulnerability in debian debian_linux. EPSS estimates a 1.72% chance of exploitation in the next 30 days, higher than 77.3% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (NVD)
EPSS score
1.72%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 1
DLA-2087-1

Timeline

  1. 06-01-2020
    PublishedVulnerability first disclosed.
  2. 05-08-2024
    Last modifiedVulnerability information updated.

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.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

1.72%

Chance of exploitation in the next 30 days

Percentile

77%

Versus all other CVEs

30-day change

0.00 pp

From 1.72% on 21-09-2026

21-09-202621-10-2026
EPSS score
1.72%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Debian2 products
Oisf1 product
Ubuntu1 product
  • suricataAll versions (No fix recorded)

3 vendors · 4 products

References

8 links