#VU29491 Improper validation of certificate with host mismatch in glib-networking - CVE-2020-13645

Vulnerability identifier: #VU29491

Vulnerability risk: Medium

CVSSv4.0: 1.7 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-13645

CWE-ID: CWE-297

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
glib-networking
Other software / Other software solutions

Vendor: Gnome Development Team

Description

The vulnerability allows a remote attacker to perform MitM attack.

The vulnerability exists in GNOME glib-networking due to implementation of GTlsClientConnection skips hostname verification of the server's TLS certificate if the application fails to specify the expected server identity. A remote attacker can perform a Man-in-he-Middle (MitM) attack and gain access to sensitive information.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

glib-networking: 2.59.2 - 2.64.2

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External links
https://gitlab.gnome.org/GNOME/balsa/-/issues/34
https://gitlab.gnome.org/GNOME/glib-networking/-/issues/135
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/HLEX2IP62SU6WJ4SK3U766XGLQK3J62O/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TQEQJQ4XFMFCFJTEXKL2ZO3UELBPCKSK/
https://security.netapp.com/advisory/ntap-20200608-0004/

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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.