CVE-2017-7177: Suricata before 3.2.1 has an IPv4 defragmentation evasion issue caused by lack of a check for the IP protocol

Q: How do I fix CVE-2017-7177?

suricata: upgrade to newer than 3.2. Exact commands for each OS are on this page.

Q: Is CVE-2017-7177 being exploited?

CVE-2017-7177 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2017-7177 affect?

CVE-2017-7177 affects suricata. Severity is high (CVSS 7.5). Suricata before 3.2.1 has an IPv4 defragmentation evasion issue caused by lack of a check for the IP protocol during fragment matching.

Q: How urgent is CVE-2017-7177?

Priority 49/100. High severity; Remotely exploitable, no login, no user action

This month

HIGH 7.5REMOTEUPGRADE

CVE-2017-7177 is a high-severity flaw (CVSS 7.5) affecting suricata. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Suricata before 3.2.1 has an IPv4 defragmentation evasion issue caused by lack of a check for the IP protocol during fragment matching.

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.3% (top 30%)
CISA exploited list	No
Weakness	CWE-358
Published	2017-03-18
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: openinfosecfoundation

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2017-03-18 20:59 UTCPublished CVE record published
2026-06-17 01:23 UTCUpdated Record last modified

openinfosecfoundation suricata UPGRADE

Affected: <= 3.2

Fixed in: newer than 3.2

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy suricata || rpm -q suricata || suricata --version

2. UPGRADE to newer than 3.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade suricata

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade suricata

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2017-7177?

suricata: upgrade to newer than 3.2. Exact commands for each OS are on this page.

Is CVE-2017-7177 being exploited?

CVE-2017-7177 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2017-7177 affect?

CVE-2017-7177 affects suricata. Severity is high (CVSS 7.5). Suricata before 3.2.1 has an IPv4 defragmentation evasion issue caused by lack of a check for the IP protocol during fragment matching.

How urgent is CVE-2017-7177?

Priority 49/100. High severity; Remotely exploitable, no login, no user action

Software pages

Suricata and Snort vulnerabilities

Related CVEs

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References

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