7.5
CWE
319
Advisory Published
CVE Published
Updated

CVE-2020-1749

First published: Wed Mar 04 2020(Updated: )

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.

Credit: secalert@redhat.com

Affected SoftwareAffected VersionHow to fix
redhat/kernel-rt<0:3.10.0-1160.rt56.1131.el7
0:3.10.0-1160.rt56.1131.el7
redhat/kernel<0:3.10.0-1160.el7
0:3.10.0-1160.el7
redhat/kernel-alt<0:4.14.0-115.35.1.el7a
0:4.14.0-115.35.1.el7a
redhat/kernel-rt<0:4.18.0-193.rt13.51.el8
0:4.18.0-193.rt13.51.el8
redhat/kernel<0:4.18.0-193.el8
0:4.18.0-193.el8
redhat/Linux kernel version<5.5
5.5
Linux Kernel
Red Hat Enterprise Linux=7.0
Red Hat Enterprise MRG=2.0
debian/linux
5.10.223-1
5.10.226-1
6.1.123-1
6.1.128-1
6.12.12-1
6.12.13-1

Remedy

Disabling the IPV6 protocol may be a suitable workaround for systems that do not require the protocol to function correctly, however, if IPV6 is not in use this flaw will not be triggered.

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Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

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

    CVE-2020-1749 is classified as a medium severity vulnerability.

  • How do I fix CVE-2020-1749?

    To fix CVE-2020-1749, update your Linux kernel to the recommended versions provided by your distribution.

  • What systems are affected by CVE-2020-1749?

    CVE-2020-1749 affects various versions of the Linux kernel, particularly in Red Hat Enterprise Linux 7 and 8.

  • What is the nature of the vulnerability in CVE-2020-1749?

    CVE-2020-1749 involves improper handling of networking protocols in IPsec, leading to potential unencrypted data transmission.

  • Can CVE-2020-1749 be exploited remotely?

    Yes, CVE-2020-1749 could potentially be exploited remotely if an attacker has access to a vulnerable network.

Contact

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