No exploitation reportedFix available

CVE-2018-5381

No exploitation reported by the sources we read.

Published2018-02-19
WeaknessCWE-228 · CWE-835

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

The Quagga BGP daemon (bgpd) prior to version 1.2.3 has a bug in its parsing of "Capabilities" in BGP OPEN messages, in the bgp_packet.c:bgp_capability_msg_parse function. The parser can enter an infinite loop on invalid capabilities if a Multi-Protocol capability does not have a recognized AFI/SAFI, causing a denial of service.

Timeline

dates in UTC

2018-02-1913:29CVE publishedNVD
2026-10-2319:23EPSS crossed 10 %FIRST EPSS

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2018-5381?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2018-5381?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Canonical ubuntu linux

Branch	Affected	Fixed in	Source
14.4	= 14.04	no fix published	NVD
16.4	= 16.04	no fix published	NVD
17.10	= 17.10	no fix published	NVD

Debian debian linux

Branch	Affected	Fixed in	Source
7.0	= 7.0	no fix published	NVD
8.0	= 8.0	no fix published	NVD
9.0	= 9.0	no fix published	NVD

Quagga

Branch	Affected	Fixed in	Source
1.2	≤ 1.2.2	no fix published	NVD

1 more product in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

ICSA-19-099-05 CISA1 known affected
ICSA-19-099-05 Siemens RUGGEDCOM ROX II
RUGGEDCOM ROX II

Full record on NVD

Fix

Vendor fix CISA ICSA-19-099-05 · 1 productUpdate to V2.13.0 - Download: The firmware updates for the RUGGEDCOM ROX-based devices can be obtained by contacting the RUGGEDCOM support team at: https://support.industry.siemens.com/my/WW/en/requests#createRequest
Mitigation from the vendor CISA ICSA-19-099-05 · 1 productSiemens has identified the following specific workarounds and mitigations thatcustomers can apply to reduce the risk: Disable the BGP routing service if not in use in your setup.
Mitigation from the vendor CISA ICSA-19-099-05 · 1 productSiemens has identified the following specific workarounds and mitigations thatcustomers can apply to reduce the risk: Configure BGP passwords to authenticate BGP neighbours.

Advisories and patches

cert-portal.siemens.comMitigation
gogs.quagga.netVendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

CNACVSS 3.06.5read 2026-10-23
NVDCVSS 3.07.5read 2026-10-23
NVDCVSS 2.05read 2026-10-23
CNAweakness (CWE)CWE-228read 2026-10-23
NVDweakness (CWE)CWE-835read 2026-10-23
FIRST EPSSEPSS score30.2 %read 2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: 2018-02-19
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2018-5381?

Is CVE-2018-5381 actively exploited?

Active exploitation of CVE-2018-5381 has not been confirmed. Its EPSS score was 30.2% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2018-5381?

CVE-2018-5381 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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