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Vulnerability details: VCID-uh6f-32wc-5qd6
Vulnerability ID VCID-uh6f-32wc-5qd6
Aliases CVE-2020-13645
Summary 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.
Status Published
Exploitability 0.5
Weighted Severity 5.9
Risk 3.0
Affected and Fixed Packages Package Details
Weaknesses (2)
CWE-297 Improper Validation of Certificate with Host Mismatch
CWE-295 Improper Certificate Validation
System Score Found at
cvssv3 6.5 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-13645.json
epss 0.00569 https://api.first.org/data/v1/epss?cve=CVE-2020-13645
epss 0.00569 https://api.first.org/data/v1/epss?cve=CVE-2020-13645
epss 0.00569 https://api.first.org/data/v1/epss?cve=CVE-2020-13645
epss 0.00569 https://api.first.org/data/v1/epss?cve=CVE-2020-13645
epss 0.00569 https://api.first.org/data/v1/epss?cve=CVE-2020-13645
epss 0.00569 https://api.first.org/data/v1/epss?cve=CVE-2020-13645
epss 0.00569 https://api.first.org/data/v1/epss?cve=CVE-2020-13645
epss 0.00569 https://api.first.org/data/v1/epss?cve=CVE-2020-13645
epss 0.00569 https://api.first.org/data/v1/epss?cve=CVE-2020-13645
epss 0.00569 https://api.first.org/data/v1/epss?cve=CVE-2020-13645
epss 0.00569 https://api.first.org/data/v1/epss?cve=CVE-2020-13645
epss 0.00569 https://api.first.org/data/v1/epss?cve=CVE-2020-13645
epss 0.00569 https://api.first.org/data/v1/epss?cve=CVE-2020-13645
epss 0.00569 https://api.first.org/data/v1/epss?cve=CVE-2020-13645
epss 0.00569 https://api.first.org/data/v1/epss?cve=CVE-2020-13645
epss 0.00569 https://api.first.org/data/v1/epss?cve=CVE-2020-13645
epss 0.00569 https://api.first.org/data/v1/epss?cve=CVE-2020-13645
epss 0.00569 https://api.first.org/data/v1/epss?cve=CVE-2020-13645
epss 0.00569 https://api.first.org/data/v1/epss?cve=CVE-2020-13645
epss 0.00569 https://api.first.org/data/v1/epss?cve=CVE-2020-13645
epss 0.00569 https://api.first.org/data/v1/epss?cve=CVE-2020-13645
epss 0.00569 https://api.first.org/data/v1/epss?cve=CVE-2020-13645
epss 0.00569 https://api.first.org/data/v1/epss?cve=CVE-2020-13645
epss 0.00569 https://api.first.org/data/v1/epss?cve=CVE-2020-13645
epss 0.00569 https://api.first.org/data/v1/epss?cve=CVE-2020-13645
epss 0.00569 https://api.first.org/data/v1/epss?cve=CVE-2020-13645
epss 0.00569 https://api.first.org/data/v1/epss?cve=CVE-2020-13645
cvssv3.1 6.5 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv2 6.4 https://nvd.nist.gov/vuln/detail/CVE-2020-13645
cvssv3.1 6.5 https://nvd.nist.gov/vuln/detail/CVE-2020-13645
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-13645.json
https://api.first.org/data/v1/epss?cve=CVE-2020-13645
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-13645
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://gitlab.gnome.org/GNOME/balsa/-/issues/34
https://gitlab.gnome.org/GNOME/glib-networking/-/issues/135
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HLEX2IP62SU6WJ4SK3U766XGLQK3J62O/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LRCUM22YEWWKNMN2BP5LTVDM5P4VWIXS/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TQEQJQ4XFMFCFJTEXKL2ZO3UELBPCKSK/
https://security.gentoo.org/glsa/202007-50
https://security.netapp.com/advisory/ntap-20200608-0004/
1842645 https://bugzilla.redhat.com/show_bug.cgi?id=1842645
961756 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=961756
cpe:2.3:a:gnome:balsa:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:gnome:balsa:*:*:*:*:*:*:*:*
cpe:2.3:a:gnome:balsa:2.6.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:gnome:balsa:2.6.0:*:*:*:*:*:*:*
cpe:2.3:a:gnome:glib-networking:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:gnome:glib-networking:*:*:*:*:*:*:*:*
cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:*
cpe:2.3:o:broadcom:fabric_operating_system:-:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:broadcom:fabric_operating_system:-:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*
cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*
CVE-2020-13645 https://nvd.nist.gov/vuln/detail/CVE-2020-13645
USN-4405-1 https://usn.ubuntu.com/4405-1/
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-13645.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: AV:N/AC:L/Au:N/C:P/I:P/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2020-13645
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2020-13645
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.67583
EPSS Score 0.00569
Published At July 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:28:03.691531+00:00 Alpine Linux Importer Import https://secdb.alpinelinux.org/v3.22/community.json 37.0.0