CVE-2020-13645

2020-05-2800:00:00

ubuntu.com

6.5 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

6.4 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:L/Au:N/C:P/I:P/A:N

0.006 Low

EPSS

Percentile

78.8%

JSON

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.

Bugs

Notes

Author	Note
mdeslaur	fixing this issue in glib-networking will require fixing balsa too

OSVersionArchitecturePackageVersionFilename
ubuntu19.10noarchbalsa< 2.5.6-2ubuntu0.1UNKNOWN
ubuntu20.04noarchbalsa< 2.6.0-2ubuntu0.1UNKNOWN
ubuntu18.04noarchglib-networking< 2.56.0-1ubuntu0.1UNKNOWN
ubuntu19.10noarchglib-networking< 2.62.1-1ubuntu0.1UNKNOWN
ubuntu20.04noarchglib-networking< 2.64.2-1ubuntu0.1UNKNOWN
ubuntu16.04noarchglib-networking< 2.48.2-1~ubuntu16.04.2UNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	19.10	noarch	balsa	< 2.5.6-2ubuntu0.1	UNKNOWN
ubuntu	20.04	noarch	balsa	< 2.6.0-2ubuntu0.1	UNKNOWN
ubuntu	18.04	noarch	glib-networking	< 2.56.0-1ubuntu0.1	UNKNOWN
ubuntu	19.10	noarch	glib-networking	< 2.62.1-1ubuntu0.1	UNKNOWN
ubuntu	20.04	noarch	glib-networking	< 2.64.2-1ubuntu0.1	UNKNOWN
ubuntu	16.04	noarch	glib-networking	< 2.48.2-1~ubuntu16.04.2	UNKNOWN