#VU51546 Cleartext transmission of sensitive information in Linux kernel - CVE-2020-25645

Vulnerability identifier: #VU51546

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-25645

CWE-ID: CWE-319

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

Description

The vulnerability allows a remote attacker to gain access to sensitive information.

The vulnerability exists due to traffic passed between two Geneve endpoints with configured IPsec can be unencrypted for the specific UDP port. A remote attacker with ability to intercept network traffic can gain access to sensitive data.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Linux kernel: 5.9 rc1 - 5.9 rc6

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External links
https://lists.opensuse.org/opensuse-security-announce/2020-10/msg00035.html
https://lists.opensuse.org/opensuse-security-announce/2020-10/msg00042.html
https://packetstormsecurity.com/files/161229/Kernel-Live-Patch-Security-Notice-LSN-0074-1.html
https://bugzilla.redhat.com/show_bug.cgi?id=1883988
https://lists.debian.org/debian-lts-announce/2020/10/msg00028.html
https://lists.debian.org/debian-lts-announce/2020/12/msg00027.html
https://security.netapp.com/advisory/ntap-20201103-0004/
https://www.debian.org/security/2020/dsa-4774

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.