MitM attack in GNOME libzapojit

1) Man-in-the-Middle (MitM) attack

EUVDB-ID: #VU67361

Risk: Medium

CVSSv3.1: 4.7 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-39360

CWE-ID: CWE-300 - Channel Accessible by Non-Endpoint ('Man-in-the-Middle')

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform MitM attack.

The vulnerability exists due to zpj-skydrive.c 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

libzapojit: 0.0.1 - 0.0.3

External links

http://blogs.gnome.org/mcatanzaro/2021/05/25/reminder-soupsessionsync-and-soupsessionasync-default-to-no-tls-certificate-verification/
http://gitlab.gnome.org/GNOME/libzapojit/-/issues/4
http://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TNSIMQXP6VQWJXI7VW7ZCLCS4NWW465T/
http://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/IDXCHOCVP3VSAKDBQSLER2DQHFIOUHAT/
http://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UG7TUICJM4QJHI4QJ2RHOSQE2QWD3KO3/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

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