Medium severity · published May 28, 2020
CVE-2020-13645
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…
6.5
CVSS
2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)2.0% · higher than 81% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
BA
Balsa · Gnome
before 2.5.11; 2.6.0 · source: NVD
CB
Cloud Backup · Netapp
All versions, or not specified · source: NVD
FO
Fabric Operating System · Broadcom
All versions, or not specified · source: NVD
FE
Fedora · Fedoraproject
31; 32 · source: NVD
GL
Glib-networking · Gnome
before 2.62.4; 2.64.0 before 2.64.3 · source: NVD
UL
Ubuntu Linux · Canonical
16.04; 18.04; 19.10; 20.04 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-13645
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-13645
Exploit
https://gitlab.gnome.org/GNOME/balsa/-/issues/34
Exploit
https://gitlab.gnome.org/GNOME/glib-networking/-/issues/135
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HLEX2IP62SU6WJ4SK3U766XGLQK3J62O/
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LRCUM22YEWWKNMN2BP5LTVDM5P4VWIXS/
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TQEQJQ4XFMFCFJTEXKL2ZO3UELBPCKSK/
Third Party Advisory
https://security.gentoo.org/glsa/202007-50
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