kernel: some ipv6 protocols not encrypted over ipsec tunnel
Published Sep 9, 2020
7.5
HIGHCVSS 3.1
EPSS 1.24%
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.
Affected products
-
- Version 5.5StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Linux Kernel | Kernel | n/a |
|
Configuration 1
- n/a
Configuration 2
- 7.0
- 2.0
No data.
Red Hat Enterprise Linux 7
kernel-0:3.10.0-1160.el7
Fixed · RHSA-2020:4060
Red Hat Enterprise Linux 7
kernel-alt-0:4.14.0-115.35.1.el7a
Fixed · RHSA-2021:0354
Red Hat Enterprise Linux 7
kernel-rt-0:3.10.0-1160.rt56.1131.el7
Fixed · RHSA-2020:4062
Red Hat Enterprise Linux 8
kernel-0:4.18.0-193.el8
Fixed · RHSA-2020:1769
Red Hat Enterprise Linux 8
kernel-rt-0:4.18.0-193.rt13.51.el8
Fixed · RHSA-2020:1567
Red Hat Enterprise Linux 5
kernel
Out of support scope
Red Hat Enterprise Linux 6
kernel
Out of support scope
Red Hat Enterprise MRG 2
kernel-rt
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 7 | kernel-0:3.10.0-1160.el7 | Fixed | RHSA-2020:4060 |
| Red Hat Enterprise Linux 7 | kernel-alt-0:4.14.0-115.35.1.el7a | Fixed | RHSA-2021:0354 |
| Red Hat Enterprise Linux 7 | kernel-rt-0:3.10.0-1160.rt56.1131.el7 | Fixed | RHSA-2020:4062 |
| Red Hat Enterprise Linux 8 | kernel-0:4.18.0-193.el8 | Fixed | RHSA-2020:1769 |
| Red Hat Enterprise Linux 8 | kernel-rt-0:4.18.0-193.rt13.51.el8 | Fixed | RHSA-2020:1567 |
| Red Hat Enterprise Linux 5 | kernel | Out of support scope | n/a |
| Red Hat Enterprise Linux 6 | kernel | Out of support scope | n/a |
| Red Hat Enterprise MRG 2 | kernel-rt | Will not fix | n/a |
No package ranges for this CVE.
Remediation
Red Hat mitigation
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.
References (6)
- https://access.redhat.com/security/cve/CVE-2020-1749 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1809833 Issue Tracking
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-1749 x_refsource_CONFIRMIssue TrackingPatchThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2020-1749
- https://security.netapp.com/advisory/ntap-20201222-0001/ x_refsource_CONFIRM
- https://www.cve.org/CVERecord?id=CVE-2020-1749
| Link | Providers | Tags |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2020-1749 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1809833 | Issue Tracking | |
| https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-1749 | x_refsource_CONFIRMIssue TrackingPatchThird Party Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2020-1749 | ||
| https://security.netapp.com/advisory/ntap-20201222-0001/ | x_refsource_CONFIRM | |
| https://www.cve.org/CVERecord?id=CVE-2020-1749 |
Change history (0)
No recorded changes yet.