VDB-204072 · CVE-2020-16093 · Issue 2250

lemonldap-ng up to 2.0.8 x.509 Certificate LemonLDAP::NG certificate validation

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.5	$0-$5k	0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in lemonldap-ng up to 2.0.8. Affected by this vulnerability is the function LemonLDAP::NG of the component x.509 Certificate Handler. The manipulation results in certificate validation. This vulnerability is reported as CVE-2020-16093. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability was found in lemonldap-ng up to 2.0.8 (Directory Service Software). It has been classified as critical. Affected is the function LemonLDAP::NG of the component x.509 Certificate Handler. The manipulation with an unknown input leads to a certificate validation vulnerability. CWE is classifying the issue as CWE-295. The product does not validate, or incorrectly validates, a certificate. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

In LemonLDAP::NG (aka lemonldap-ng) through 2.0.8, validity of the X.509 certificate is not checked by default when connecting to remote LDAP backends, because the default configuration of the Net::LDAPS module for Perl is used.

The weakness was disclosed 07/18/2022 as 2250. The advisory is shared for download at gitlab.ow2.org. This vulnerability is traded as CVE-2020-16093 since 07/28/2020. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1587.003.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

Directory Service Software

Name

lemonldap-ng

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.5

VulDB Base Score: 5.6
VulDB Temp Score: 5.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
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Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Certificate validation
CWE: CWE-295 / CWE-287
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

07/28/2020 🔍
07/18/2022 +720 days 🔍
07/18/2022 +0 days 🔍
08/01/2022 +14 days 🔍

Sourcesinfo

Advisory: 2250
Status: Confirmed

CVE: CVE-2020-16093 (🔍)
GCVE (CVE): GCVE-0-2020-16093
GCVE (VulDB): GCVE-100-204072

Entryinfo

Created: 07/18/2022 08:25
Updated: 08/01/2022 15:41
Changes: 07/18/2022 08:25 (40), 08/01/2022 15:41 (11)
Complete: 🔍
Cache ID: 216::103