CVE-2017-3224: Open Shortest Path First (OSPF) protocol implementations may improperly determine Link State Advertisement (LS

This month

HIGH 8.2WATCHLISTMITIGATEMITIGATEMITIGATE

CVE-2017-3224 is a high-severity flaw (CVSS 8.2) affecting quagga, opensuse, suse linux. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Open Shortest Path First (OSPF) protocol implementations may improperly determine Link State Advertisement (LSA) recency for LSAs with MaxSequenceNumber. According to RFC 2328 section 13.1, for two instances of the same LSA, recency is determined by first comparing sequence numbers, then checksums, and finally MaxAge. In a case where the sequence numbers are the same, the LSA with the larger checksum is considered more recent, and will not be flu

Why this priority

High severity
On your watchlist

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	8.2 (High)
Attack vector	Adjacent network
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	1.1% (top 35%)
CISA exploited list	No
Weakness	CWE-354, CWE-345
Published	2018-07-24
Last modified	2026-06-17

Publisher (CNA): CERT/CC · Vendor: quagga · redhat · suse

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

Am I affected?

Timeline

2018-07-24 15:29 UTCPublished CVE record published
2026-06-17 01:17 UTCUpdated Record last modified

quagga quagga MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

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

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

suse opensuse MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

suse suse linux MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

redhat package manager MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy package-manager || rpm -q package-manager || package-manager --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

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-2017-3224?

quagga: mitigate or apply the listed mitigation; opensuse: mitigate or apply the listed mitigation; suse linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2017-3224 being exploited?

CVE-2017-3224 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-2017-3224 affect?

CVE-2017-3224 affects quagga, opensuse, suse linux. Severity is high (CVSS 8.2). Open Shortest Path First (OSPF) protocol implementations may improperly determine Link State Advertisement (LSA) recency for LSAs with MaxSequenceNumber. According to RFC 2328 section 13.1, for two instances of the same LSA, recency is dete

How urgent is CVE-2017-3224?

Priority 50/100. High severity; On your watchlist

Related CVEs

CVE-2021-44038 HIGH 7.8 UPGRADE An issue was discovered in Quagga through 1.2.4
CVE-2018-5381 MEDIUM 6.5 UPGRADE MITIGATE The Quagga BGP daemon (bgpd) prior to version 1.2.3 has a bug in its parsing of "Capabilities" in BGP OPEN mes
CVE-2018-5380 MEDIUM 4.3 UPGRADE MITIGATE The Quagga BGP daemon (bgpd) prior to version 1.2.3 can overrun internal BGP code-to-string conversion tables
CVE-2018-5379 HIGH 7.5 UPGRADE MITIGATE The Quagga BGP daemon (bgpd) prior to version 1.2.3 can double-free memory when processing certain forms of UP
CVE-2018-5378 HIGH 7.1 UPGRADE MITIGATE The Quagga BGP daemon (bgpd) prior to version 1.2.3 does not properly bounds check the data sent with a NOTIFY

References

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