CVE-2020-13645

Public Exploit

Description

In GNOME glib-networking through 2.64.2, the implementation of GTlsClientConnection skips hostname verification of the server's TLS certificate if the application fails to specify the expected server identity. This is in contrast to its intended documented behavior, to fail the certificate verification. Applications that fail to provide the server identity, including Balsa before 2.5.11 and 2.6.x before 2.6.1, accept a TLS certificate if the certificate is valid for any host.

Category

6.5
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.21%
Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory ubuntu.com Vendor Advisory gentoo.org Vendor Advisory gnome.org Vendor Advisory gnome.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://gitlab.gnome.org/GNOME/glib-networking/-/issues/135 vendor advisory exploit
https://gitlab.gnome.org/GNOME/balsa/-/issues/34 vendor advisory exploit
https://security.netapp.com/advisory/ntap-20200608-0004/ third party advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TQEQJQ4XFMFCFJTEXKL2ZO3UELBPCKSK/ vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HLEX2IP62SU6WJ4SK3U766XGLQK3J62O/ vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LRCUM22YEWWKNMN2BP5LTVDM5P4VWIXS/ vendor advisory
https://usn.ubuntu.com/4405-1/ third party advisory vendor advisory
https://security.gentoo.org/glsa/202007-50 third party advisory vendor advisory

Frequently Asked Questions

What is the severity of CVE-2020-13645?
CVE-2020-13645 has been scored as a medium severity vulnerability.
How to fix CVE-2020-13645?
To fix CVE-2020-13645, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2020-13645 being actively exploited in the wild?
It is possible that CVE-2020-13645 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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