Is CVE-2020-1749 in the CISA KEV catalog?

No. CVE-2020-1749 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2020-1749?

CVE-2020-1749 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2020-1749?

CVE-2020-1749 has an EPSS score of 1.23% (65th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2020-1749?

Upgrade linux on debian 11 to 5.4.6-1 or later. Fixes are available for 80 affected products.

CVE & CISA-KEV Catalog

CVE-2020-1749

HIGH

7.5

CVSS v3

NVD

Description

A flaw was found in the Linux kernel's implementation of some networking protocols in IPsec, such as VXLAN and GENEVE tunnels over IPv6. When an encrypted tunnel is created between two hosts, the kernel isn't correctly routing tunneled data over the encrypted link; rather sending the data unencrypted. This would allow anyone in between the two endpoints to read the traffic unencrypted. The main threat from this vulnerability is to data confidentiality.

CWE-319

How to fix

Remediation Available

linuxDebian

Fixed in:5.4.6-1CVE-2020-1749

linuxUbuntu

Fixed in:4.4.0-184.214USN-4391-1

Fixed in:4.15.0-106.107USN-4390-1

linux-awsUbuntu

Fixed in:4.4.0-1073.77USN-4391-1

Fixed in:4.4.0-1109.120USN-4391-1

Fixed in:4.15.0-1073.77USN-4390-1

linux-aws-hweUbuntu

Fixed in:4.15.0-1073.77~16.04.1USN-4390-1

linux-azureUbuntu

Fixed in:4.15.0-1089.99~14.04.1USN-4390-1

Fixed in:4.15.0-1089.99~16.04.1USN-4390-1

linux-azure-4.15Ubuntu

Fixed in:4.15.0-1089.99USN-4390-1

linux-gcpUbuntu

Fixed in:4.15.0-1077.87~16.04.1USN-4390-1

linux-gke-4.15Ubuntu

Fixed in:4.15.0-1063.66USN-4390-1

linux-gke-5.0Ubuntu

Fixed in:5.0.0-1042.43USN-4388-1

linux-hweUbuntu

Fixed in:4.15.0-106.107~16.04.1USN-4390-1

linux-image-4.15.0-1045-oracleUbuntu

Fixed in:4.15.0-1045.49~16.04.1USN-4390-1

Fixed in:4.15.0-1045.49USN-4390-1

linux-image-4.15.0-106-genericUbuntu

Fixed in:4.15.0-106.107~16.04.1USN-4390-1

Fixed in:4.15.0-106.107USN-4390-1

linux-image-4.15.0-106-generic-lpaeUbuntu

Fixed in:4.15.0-106.107~16.04.1USN-4390-1

Fixed in:4.15.0-106.107USN-4390-1

linux-image-4.15.0-106-lowlatencyUbuntu

Fixed in:4.15.0-106.107~16.04.1USN-4390-1

Fixed in:4.15.0-106.107USN-4390-1

linux-image-4.15.0-1063-gkeUbuntu

Fixed in:4.15.0-1063.66USN-4390-1

linux-image-4.15.0-1063-raspi2Ubuntu

Fixed in:4.15.0-1063.67USN-4390-1

linux-image-4.15.0-1067-kvmUbuntu

Fixed in:4.15.0-1067.68USN-4390-1

linux-image-4.15.0-1073-awsUbuntu

Fixed in:4.15.0-1073.77~16.04.1USN-4390-1

Fixed in:4.15.0-1073.77USN-4390-1

linux-image-4.15.0-1077-gcpUbuntu

Fixed in:4.15.0-1077.87~16.04.1USN-4390-1

linux-image-4.15.0-1080-snapdragonUbuntu

Fixed in:4.15.0-1080.87USN-4390-1

linux-image-4.15.0-1087-oemUbuntu

Fixed in:4.15.0-1087.97USN-4390-1

linux-image-4.15.0-1089-azureUbuntu

Fixed in:4.15.0-1089.99~14.04.1USN-4390-1

Fixed in:4.15.0-1089.99~16.04.1USN-4390-1

Fixed in:4.15.0-1089.99USN-4390-1

linux-image-4.4.0-1073-awsUbuntu

Fixed in:4.4.0-1073.77USN-4391-1

linux-image-4.4.0-1075-kvmUbuntu

Fixed in:4.4.0-1075.82USN-4391-1

linux-image-4.4.0-1109-awsUbuntu

Fixed in:4.4.0-1109.120USN-4391-1

linux-image-4.4.0-1134-raspi2Ubuntu

Fixed in:4.4.0-1134.143USN-4391-1

linux-image-4.4.0-1138-snapdragonUbuntu

Fixed in:4.4.0-1138.146USN-4391-1

linux-image-4.4.0-184-genericUbuntu

Fixed in:4.4.0-184.214~14.04.1USN-4391-1

Fixed in:4.4.0-184.214USN-4391-1

linux-image-4.4.0-184-generic-lpaeUbuntu

Fixed in:4.4.0-184.214~14.04.1USN-4391-1

Fixed in:4.4.0-184.214USN-4391-1

linux-image-4.4.0-184-lowlatencyUbuntu

Fixed in:4.4.0-184.214~14.04.1USN-4391-1

Fixed in:4.4.0-184.214USN-4391-1

linux-image-4.4.0-184-powerpc-e500mcUbuntu

Fixed in:4.4.0-184.214~14.04.1USN-4391-1

Fixed in:4.4.0-184.214USN-4391-1

linux-image-4.4.0-184-powerpc-smpUbuntu

Fixed in:4.4.0-184.214~14.04.1USN-4391-1

Fixed in:4.4.0-184.214USN-4391-1

linux-image-4.4.0-184-powerpc64-embUbuntu

Fixed in:4.4.0-184.214~14.04.1USN-4391-1

Fixed in:4.4.0-184.214USN-4391-1

linux-image-4.4.0-184-powerpc64-smpUbuntu

Fixed in:4.4.0-184.214~14.04.1USN-4391-1

Fixed in:4.4.0-184.214USN-4391-1

linux-image-5.0.0-1042-gkeUbuntu

Fixed in:5.0.0-1042.43USN-4388-1

linux-image-5.0.0-1059-oem-osp1Ubuntu

Fixed in:5.0.0-1059.64USN-4388-1

linux-image-awsUbuntu

Fixed in:4.4.0.1073.70USN-4391-1

Fixed in:4.4.0.1109.113USN-4391-1

linux-image-aws-hweUbuntu

Fixed in:4.15.0.1073.73USN-4390-1

linux-image-aws-lts-18.04Ubuntu

Fixed in:4.15.0.1073.76USN-4390-1

linux-image-azureUbuntu

Fixed in:4.15.0.1089.66USN-4390-1

Fixed in:4.15.0.1089.84USN-4390-1

linux-image-azure-edgeUbuntu

Fixed in:4.15.0.1089.84USN-4390-1

linux-image-azure-lts-18.04Ubuntu

Fixed in:4.15.0.1089.60USN-4390-1

linux-image-gcpUbuntu

Fixed in:4.15.0.1077.79USN-4390-1

linux-image-genericUbuntu

Fixed in:4.4.0.184.190USN-4391-1

Fixed in:4.15.0.106.94USN-4390-1

linux-image-generic-hwe-16.04Ubuntu

Fixed in:4.15.0.106.111USN-4390-1

linux-image-generic-lpaeUbuntu

Fixed in:4.4.0.184.190USN-4391-1

Fixed in:4.15.0.106.94USN-4390-1

linux-image-generic-lpae-hwe-16.04Ubuntu

Fixed in:4.15.0.106.111USN-4390-1

linux-image-generic-lpae-lts-xenialUbuntu

Fixed in:4.4.0.184.161USN-4391-1

linux-image-generic-lts-xenialUbuntu

Fixed in:4.4.0.184.161USN-4391-1

linux-image-gkeUbuntu

Fixed in:4.15.0.1077.79USN-4390-1

Fixed in:4.15.0.1063.65USN-4390-1

linux-image-gke-4.15Ubuntu

Fixed in:4.15.0.1063.65USN-4390-1

linux-image-gke-5.0Ubuntu

Fixed in:5.0.0.1042.27USN-4388-1

linux-image-kvmUbuntu

Fixed in:4.4.0.1075.73USN-4391-1

Fixed in:4.15.0.1067.63USN-4390-1

linux-image-lowlatencyUbuntu

Fixed in:4.4.0.184.190USN-4391-1

Fixed in:4.15.0.106.94USN-4390-1

linux-image-lowlatency-hwe-16.04Ubuntu

Fixed in:4.15.0.106.111USN-4390-1

linux-image-lowlatency-lts-xenialUbuntu

Fixed in:4.4.0.184.161USN-4391-1

linux-image-oemUbuntu

Fixed in:4.15.0.106.111USN-4390-1

Fixed in:4.15.0.1087.91USN-4390-1

linux-image-oem-osp1Ubuntu

Fixed in:5.0.0.1059.58USN-4388-1

linux-image-oracleUbuntu

Fixed in:4.15.0.1045.38USN-4390-1

linux-image-oracle-lts-18.04Ubuntu

Fixed in:4.15.0.1045.54USN-4390-1

linux-image-powerpc-e500mcUbuntu

Fixed in:4.4.0.184.190USN-4391-1

linux-image-powerpc-e500mc-lts-xenialUbuntu

Fixed in:4.4.0.184.161USN-4391-1

linux-image-powerpc-smpUbuntu

Fixed in:4.4.0.184.190USN-4391-1

linux-image-powerpc-smp-lts-xenialUbuntu

Fixed in:4.4.0.184.161USN-4391-1

linux-image-powerpc64-embUbuntu

Fixed in:4.4.0.184.190USN-4391-1

linux-image-powerpc64-emb-lts-xenialUbuntu

Fixed in:4.4.0.184.161USN-4391-1

linux-image-powerpc64-smpUbuntu

Fixed in:4.4.0.184.190USN-4391-1

linux-image-powerpc64-smp-lts-xenialUbuntu

Fixed in:4.4.0.184.161USN-4391-1

linux-image-raspi2Ubuntu

Fixed in:4.4.0.1134.134USN-4391-1

Fixed in:4.15.0.1063.61USN-4390-1

linux-image-snapdragonUbuntu

Fixed in:4.4.0.1138.130USN-4391-1

Fixed in:4.15.0.1080.83USN-4390-1

linux-image-virtualUbuntu

Fixed in:4.4.0.184.190USN-4391-1

Fixed in:4.15.0.106.94USN-4390-1

linux-image-virtual-hwe-16.04Ubuntu

Fixed in:4.15.0.106.111USN-4390-1

linux-image-virtual-lts-xenialUbuntu

Fixed in:4.4.0.184.161USN-4391-1

linux-kvmUbuntu

Fixed in:4.4.0-1075.82USN-4391-1

Fixed in:4.15.0-1067.68USN-4390-1

linux-lts-xenialUbuntu

Fixed in:4.4.0-184.214~14.04.1USN-4391-1

linux-oemUbuntu

Fixed in:4.15.0-1087.97USN-4390-1

linux-oem-osp1Ubuntu

Fixed in:5.0.0-1059.64USN-4388-1

linux-oracleUbuntu

Fixed in:4.15.0-1045.49~16.04.1USN-4390-1

Fixed in:4.15.0-1045.49USN-4390-1

linux-raspi2Ubuntu

Fixed in:4.4.0-1134.143USN-4391-1

Fixed in:4.15.0-1063.67USN-4390-1

linux-snapdragonUbuntu

Fixed in:4.4.0-1138.146USN-4391-1

Fixed in:4.15.0-1080.87USN-4390-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Exploit Intelligence

1.23%probability of exploitation in 30 days

65thpercentile

Moderate risk: more likely to be exploited than 65% of all known CVEs.

References

Patch1

bugzilla.redhat.com

Other references1

security.netapp.com

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.