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Vulnerability · Published Sep 9, 2020 · Assigned by redhat

CVE-2020-1749

High 7.5

In plain English

A high-severity security flaw in kernel from Linux Kernel. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.2% (higher than 69% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High
Exploit odds (30 days)1.2%top 30.7% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official 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 packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux5.4.6-1DEBIAN-CVE-2020-1749
Debian:13linux5.4.6-1DEBIAN-CVE-2020-1749
Debian:14linux5.4.6-1DEBIAN-CVE-2020-1749
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2020-1749
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2020-1749
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2020-1749
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2020-1749

Affected products (as reported)

VendorProductVersions
Linux Kernel kernel 5.5

Weakness: CWE-319 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References