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 secalert@redhat.com
| Affected Software | Affected Version | How 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 |
| Linux Linux kernel | ||
| Redhat Enterprise Linux | =7.0 | |
| Redhat Enterprise Mrg | =2.0 | |
| redhat/Linux kernel version | <5.5 | 5.5 |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.115-1 6.1.119-1 6.11.10-1 6.12.5-1 |
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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Reference Links
- https://www.cve.org/CVERecord?id=CVE-2020-1749 https://nvd.nist.gov/vuln/detail/CVE-2020-1749
- https://bugzilla.redhat.com/show_bug.cgi?id=1809833
- https://access.redhat.com/errata/RHSA-2020:4062
- https://access.redhat.com/errata/RHSA-2020:4060
- https://access.redhat.com/errata/RHSA-2021:0354
- https://access.redhat.com/errata/RHSA-2020:1567
- https://access.redhat.com/errata/RHSA-2020:1769
- https://access.redhat.com/security/cve/cve-2020-1749
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-1749
- https://security.netapp.com/advisory/ntap-20201222-0001/
- https://launchpad.net/bugs/cve/CVE-2020-1749
- https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=6c8991f41546
- https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=5f81bd2e5d80
- https://git.kernel.org/linus/6c8991f41546c3c472503dff1ea9daaddf9331c2
- https://security-tracker.debian.org/tracker/CVE-2020-1749
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-1749
- https://nvd.nist.gov/vuln/detail/CVE-2020-1749
- https://ubuntu.com/security/CVE-2020-1749
Parent vulnerabilities
(Appears in the following advisories)
- collector/redhat-cve
- collector/nvd-index
- agent/type
- collector/launchpad-cve
- source/Launchpad
- agent/author
- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2020-1749
- agent/software-canonical-lookup
- agent/weakness
- agent/severity
- collector/mitre-cve
- source/MITRE
- agent/remedy
- agent/references
- agent/first-publish-date
- agent/tags
- collector/usn-cve
- source/Ubuntu
- agent/description
- agent/event
- collector/nvd-cve
- source/NVD
- agent/last-modified-date
- collector/security-tracker-debian
- source/Debian
- agent/softwarecombine
- agent/trending
- package-manager/redhat
- vendor/linux
- canonical/linux linux kernel
- vendor/redhat
- canonical/redhat enterprise linux
- version/redhat enterprise linux/7.0
- canonical/redhat enterprise mrg
- version/redhat enterprise mrg/2.0
- package-manager/debian