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CVE-2020-13645

MEDIUM
6.5
CVSS Score
Published: May 28, 2020 at 11:55 AM UTC
Updated: June 17, 2026 at 02:53 AM UTC
6 products affected across 5 vendorsFedoraUbuntu LinuxCloud Backup

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Severity
MEDIUM6.5
Exploit prediction
EPSS 2%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Fabric Operating System· Broadcom
95%
All versions
Ubuntu Linux· Canonicalrubygems
95%
16.0418.0419.1020.04
Fedora· Fedora Projectrpm
95%
3132
Balsa· Gnome
95%
v < 2.5.112.6.0
Affected range stops below 2.5.11, so it looks safe — our inference, not a vendor statement
Glib Networking· Gnome
95%
v < 2.62.42.64.0 ≤ v < 2.64.3
Affected range stops below 2.62.4, so it looks safe — our inference, not a vendor statement
Affected range stops below 2.64.3, so it looks safe — our inference, not a vendor statement
Cloud Backup· NetAppdrupal
95%
All versions

References (8)

x_refsource_MISCExploitVendor Advisory
Source: [email protected]
https://gitlab.gnome.org/GNOME/balsa/-/issues/34
x_refsource_MISCExploitVendor Advisory
Source: [email protected]
https://gitlab.gnome.org/GNOME/glib-networking/-/issues/135
Vendor Advisoryx_refsource_FEDORA
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HLEX2IP62SU6WJ4SK3U766XGLQK3J62O/
Vendor Advisoryx_refsource_FEDORA
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LRCUM22YEWWKNMN2BP5LTVDM5P4VWIXS/
Vendor Advisoryx_refsource_FEDORA
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TQEQJQ4XFMFCFJTEXKL2ZO3UELBPCKSK/
Vendor Advisoryx_refsource_GENTOOThird Party Advisory
Source: [email protected]
https://security.gentoo.org/glsa/202007-50
x_refsource_CONFIRMThird Party Advisory
Source: [email protected]
https://security.netapp.com/advisory/ntap-20200608-0004/
Vendor Advisoryx_refsource_UBUNTUThird Party Advisory
Source: [email protected]
https://usn.ubuntu.com/4405-1/

CVSS

6.5MEDIUM[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-295

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