Vulnerability CVE-2019-19270

Vulnerability Name:

CVE-2019-19270 (CCN-172218)

Assigned:

2019-11-05

Published:

2019-11-05

Updated:

2020-01-13

Summary:

An issue was discovered in tls_verify_crl in ProFTPD through 1.3.6b. Failure to check for the appropriate field of a CRL entry (checking twice for subject, rather than once for subject and once for issuer) prevents some valid CRLs from being taken into account, and can allow clients whose certificates have been revoked to proceed with a connection to the server.

CVSS v3 Severity:

7.5 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N)
6.5 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C)

Exploitability Metrics:	Attack Vector (AV): Network Attack Complexity (AC): Low Privileges Required (PR): None User Interaction (UI): None
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): None Integrity (I): High Availibility (A): None

5.3 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N)
4.6 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C)

Exploitability Metrics:	Attack Vector (AV): Network Attack Complexity (AC): Low Privileges Required (PR): None User Interaction (UI): None
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): None Integrity (I): Low Availibility (A): None

CVSS v2 Severity:

5.0 Medium (CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:P/A:N)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Low Authentication (Au): None
Impact Metrics:	Confidentiality (C): None Integrity (I): Partial Availibility (A): None

5.0 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:P/A:N)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Low Athentication (Au): None
Impact Metrics:	Confidentiality (C): None Integrity (I): Partial Availibility (A): None

Vulnerability Type:

CWE-295

Vulnerability Consequences:

Bypass Security

References:

Source: MITRE
Type: CNA
CVE-2019-19270

Source: SUSE
Type: UNKNOWN
openSUSE-SU-2020:0031

Source: XF
Type: UNKNOWN
proftpd-cve201919270-sec-bypass(172218)

Source: CCN
Type: proftpd GIT Repository
Improper TLS CRL handling 1/2 in mod_tls of ProFTPD master HEAD #859

Source: MISC
Type: Patch, Third Party Advisory
https://github.com/proftpd/proftpd/issues/859

Source: FEDORA
Type: Third Party Advisory
FEDORA-2019-65a983b8b6

Source: FEDORA
Type: Third Party Advisory
FEDORA-2019-bfacf1e958

Vulnerable Configuration:

Configuration 1:

cpe:/a:proftpd:proftpd:*:*:*:*:*:*:*:* (Version <= 1.3.5)

OR cpe:/a:proftpd:proftpd:1.3.6:-:*:*:*:*:*:*

OR cpe:/a:proftpd:proftpd:1.3.6:alpha:*:*:*:*:*:*

OR cpe:/a:proftpd:proftpd:1.3.6:beta:*:*:*:*:*:*

Configuration 2:

cpe:/o:fedoraproject:fedora:30:*:*:*:*:*:*:*

OR cpe:/o:fedoraproject:fedora:31:*:*:*:*:*:*:*

Denotes that component is vulnerable

Oval Definitions

Definition ID	Class	Title	Last Modified
oval:org.opensuse.security:def:74757	P	Security update for go1.17 (Moderate)	2021-12-23
oval:org.opensuse.security:def:201919270	V	CVE-2019-19270	2021-10-24
oval:org.opensuse.security:def:64570	P	Security update for java-11-openjdk (Important)	2021-09-03
oval:org.opensuse.security:def:93576	P	(Moderate)	2021-08-23
oval:org.opensuse.security:def:63461	P	vpx-tools-1.6.1-6.6.8 on GA media (Moderate)	2021-08-10
oval:org.opensuse.security:def:62787	P	libgypsy-devel-0.9-2.30 on GA media (Moderate)	2021-08-09
oval:org.opensuse.security:def:62755	P	gstreamer-plugins-bad-1.16.2-7.22 on GA media (Moderate)	2021-08-09
oval:org.opensuse.security:def:62759	P	hplip-3.20.11-2.1 on GA media (Moderate)	2021-08-09
oval:org.opensuse.security:def:62762	P	imlib2-loaders-1.4.10-1.28 on GA media (Moderate)	2021-08-09
oval:org.opensuse.security:def:100289	P	(Moderate)	2021-06-04
oval:org.opensuse.security:def:64512	P	Security update for gstreamer, gstreamer-plugins-bad, gstreamer-plugins-base, gstreamer-plugins-good, gstreamer-plugins-ugly (Important)	2021-06-01
oval:org.opensuse.security:def:64682	P	Security update for avahi (Moderate)	2021-05-04
oval:org.opensuse.security:def:74624	P	Security update for spamassassin (Important)	2021-04-13
oval:org.opensuse.security:def:63608	P	argyllcms-1.9.2-2.27 on GA media (Moderate)	2020-12-03
oval:org.opensuse.security:def:62965	P	log4j12-javadoc-1.2.17-2.26 on GA media (Moderate)	2020-12-03
oval:org.opensuse.security:def:63258	P	dhcp-relay-4.3.5-6.3.1 on GA media (Moderate)	2020-12-03
oval:org.opensuse.security:def:64302	P	libXfont-devel on GA media (Moderate)	2020-12-01
oval:org.opensuse.security:def:64303	P	libXfont2-2 on GA media (Moderate)	2020-12-01
oval:org.opensuse.security:def:63837	P	Security update for clamav (Moderate)	2020-12-01
oval:org.opensuse.security:def:64410	P	libykcs11-1 on GA media (Moderate)	2020-12-01
oval:org.opensuse.security:def:64166	P	Security update for xen (Important)	2020-12-01
oval:org.opensuse.security:def:110419	P	Security update for proftpd (Moderate)	2020-01-13
oval:com.ubuntu.disco:def:2019192700000000	V	CVE-2019-19270 on Ubuntu 19.04 (disco) - medium.	2019-11-26
oval:com.ubuntu.bionic:def:2019192700000000	V	CVE-2019-19270 on Ubuntu 18.04 LTS (bionic) - medium.	2019-11-26
oval:com.ubuntu.xenial:def:2019192700000000	V	CVE-2019-19270 on Ubuntu 16.04 LTS (xenial) - medium.	2019-11-26

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