#VU66986 Improper Certificate Validation in libgda - CVE-2021-39359

Vulnerability identifier: #VU66986

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-2021-39359

CWE-ID: CWE-295

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
libgda
Universal components / Libraries / Libraries used by multiple products

Vendor: Gnome Development Team

Description

The vulnerability allows a remote attacker to perform MitM attack.

The vulnerability exists due to missing certificate validation in gda-web-provider.c, which does not enable TLS certificate verification on the SoupSessionSync objects it creates. A remote attacker can perform Man-in-the-Middle (MitM) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

libgda: 0.2.91 - 6.0.0

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External links
https://gitlab.gnome.org/GNOME/libgda/-/issues/249
https://blogs.gnome.org/mcatanzaro/2021/05/25/reminder-soupsessionsync-and-soupsessionasync-default-to-no-tls-certificate-verification/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/HRPPP47WRCAPAEJGRMEKYYJZBQCYXTLQ/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WLMVVIJNY5NMOT3FH36RFBWOTPVW7GME/

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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.