HOMEVULNERABILITIESCVE-2020-13645
MEDIUM

CVE-2020-13645

CWE-295Published: May 28, 2020· Updated: Jun 17, 2026

6.5
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2020-13645 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityLow
IntegrityLow
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Affected Vendors & Products

broadcom1 product(s)
fabric operating system
Canonical1 product(s)
ubuntu linux
Fedora1 product(s)
fedora
gnome2 product(s)
balsaglib-networking
netapp1 product(s)
cloud backup
Source: NVD CPE · 11 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://gitlab.gnome.org/GNOME/balsa/-/issues/34
ADVISORYhttps://gitlab.gnome.org/GNOME/glib-networking/-/issues/135
ADVISORYhttps://security.gentoo.org/glsa/202007-50
ADVISORYhttps://security.netapp.com/advisory/ntap-20200608-0004/
ADVISORYhttps://usn.ubuntu.com/4405-1/
ADVISORYhttps://gitlab.gnome.org/GNOME/balsa/-/issues/34
ADVISORYhttps://gitlab.gnome.org/GNOME/glib-networking/-/issues/135
ADVISORYhttps://security.gentoo.org/glsa/202007-50
ADVISORYhttps://security.netapp.com/advisory/ntap-20200608-0004/
ADVISORYhttps://usn.ubuntu.com/4405-1/

All References (16)

→
https://gitlab.gnome.org/GNOME/balsa/-/issues/34Exploit · Vendor Advisory
→
https://gitlab.gnome.org/GNOME/glib-networking/-/issues/135Exploit · Vendor Advisory
→
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/202007-50Third Party Advisory
→
https://security.netapp.com/advisory/ntap-20200608-0004/Third Party Advisory
→
https://usn.ubuntu.com/4405-1/Third Party Advisory
→
https://gitlab.gnome.org/GNOME/balsa/-/issues/34Exploit · Vendor Advisory
→
https://gitlab.gnome.org/GNOME/glib-networking/-/issues/135Exploit · Vendor Advisory
→
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/202007-50Third Party Advisory
→
https://security.netapp.com/advisory/ntap-20200608-0004/Third Party Advisory

Quick Facts

CVE IDCVE-2020-13645
CVSS Score6.5 / 10
SeverityMEDIUM
WeaknessCWE-295
CISA KEVNo
Affected5 vendor(s)
PublishedMay 28, 2020

Related CVEs (CWE-295)

CVE-2026-4370
10.0
CVE-2022-45100
9.8
CVE-2021-40855
9.8
CVE-2022-42813
9.8
CVE-2021-33907
9.8
CVE-2021-46880
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2020-13645 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
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