CVE-2020-13645

Exp

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.

Published: 2020-05-28 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2020-13645 is rated High Exploit Risk (63.4/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.46%). 2 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2020-13645

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2020-13645

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-05-29 0.61% 0.46% -0.15%
2 2025-11-21 0.30% 0.61% +0.31%
3 2025-11-18 — 0.30% —

Full EPSS history (19 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2020-13645

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.5 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 2.5 [email protected]
6.4 2.0 MEDIUM
AV:N/AC:L/Au:N/C:P/I:P/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:N)
No availability impact.
 10.0 4.9 [email protected]

Weakness enumeration for CVE-2020-13645

OS Trackers for CVE-2020-13645

vendor priority summary link
alpine medium CVE-2020-13645: 1 source package rows (glib-networking); 7 state rows across 7 repos (3.17-community, 3.18-community, 3.19-community, 3.20-community, 3.21-community, 3.22-community, edge-community); fixed 7, open 0. https://security.alpinelinux.org/vuln/CVE-2020-13645
debian not yet assigned CVE-2020-13645 not yet assigned priority: Debian including 1 source packages (glib-networking), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2020-13645
gentoo normal CVE-2020-13645: 1 GLSA(s) (202007-50), 1 atom(s) (net-libs/glib-networking); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2020-13645
redhat medium — https://access.redhat.com/security/cve/CVE-2020-13645
suse medium CVE-2020-13645 severity moderate: SUSE including 27 source package names (balsa-2.6.1-bp152.2.3.1, balsa-2.6.1-bp153.2.3.1, …), 106 product×package rows across 59 product lines (HPE Helion OpenStack 8, Image SLES12-SP5-SAP-Azure-LI-BYOS-Production, … (59 product lines)): Fixed 106. https://www.suse.com/security/cve/CVE-2020-13645/
ubuntu medium CVE-2020-13645 medium priority: Ubuntu including 2 source packages (balsa, glib-networking), 12 status rows across 6 suites (bionic, eoan, focal, trusty, upstream, xenial): released 6, DNE 2, needs-triage 2, not-affected 2. https://ubuntu.com/security/CVE-2020-13645

Affected software / configurations for CVE-2020-13645

Vendor Product Version Raw CPE
gnome balsa < 2.5.11 cpe:2.3:a:gnome:balsa:*:*:*:*:*:*:*:*
gnome balsa 2.6.0 cpe:2.3:a:gnome:balsa:2.6.0:*:*:*:*:*:*:*
gnome glib-networking < 2.62.4 cpe:2.3:a:gnome:glib-networking:*:*:*:*:*:*:*:*
gnome glib-networking >= 2.64.0, < 2.64.3 cpe:2.3:a:gnome:glib-networking:*:*:*:*:*:*:*:*
canonical ubuntu_linux 16.04 cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
canonical ubuntu_linux 18.04 cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
canonical ubuntu_linux 19.10 cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:*
canonical ubuntu_linux 20.04 cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*
fedoraproject fedora 31 cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*
fedoraproject fedora 32 cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*
netapp cloud_backup — cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:*
broadcom fabric_operating_system — cpe:2.3:o:broadcom:fabric_operating_system:-:*:*:*:*:*:*:*

References for CVE-2020-13645

cvelogic Threat Intelligence