VDB-144679 · CVE-2018-21029 · ID 9397

systemd up to 243 Certificate Validation certificate validation ⚔ [Disputed]

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.
7.6	$0-$5k	0.00

Summaryinfo

A vulnerability has been found in systemd 239/240/241/242/243 and classified as critical. The impacted element is an unknown function of the component Certificate Validation Handler. This manipulation causes certificate validation. The identification of this vulnerability is CVE-2018-21029. It is possible to initiate the attack remotely. There is no exploit available. The presence of this vulnerability remains uncertain at this time.

Detailsinfo

A vulnerability has been found in systemd 239/240/241/242/243 and classified as critical. Affected by this vulnerability is an unknown part of the component Certificate Validation Handler. The manipulation with an unknown input leads to a certificate validation vulnerability. The CWE definition for the vulnerability is CWE-295. The product does not validate, or incorrectly validates, a certificate. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

systemd 239 through 243 accepts any certificate signed by a trusted certificate authority for DNS Over TLS. Server Name Indication (SNI) is not sent, and there is no hostname validation with the GnuTLS backend.

The weakness was shared 10/30/2019. This vulnerability is known as CVE-2018-21029 since 10/30/2019. The exploitation appears to be difficult. The attack can be launched remotely. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 08/06/2024). The attack technique deployed by this issue is T1587.003 according to MITRE ATT&CK.

The real existence of this vulnerability is still doubted at the moment.

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

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Name

systemd

Version

License

open-source

Website

Product: https://github.com/systemd/systemd/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.7
VulDB Meta Temp Score: 7.7

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

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

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

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

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

NVD Base Score: 🔍

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: 🔍

Patch: github.com

Timelineinfo

10/30/2019 🔍
10/30/2019 +0 days 🔍
11/01/2019 +2 days 🔍
08/06/2024 +1740 days 🔍

Sourcesinfo

Product: github.com

Advisory: 9397
Status: Not defined
Disputed: 🔍

CVE: CVE-2018-21029 (🔍)
GCVE (CVE): GCVE-0-2018-21029
GCVE (VulDB): GCVE-100-144679

Entryinfo

Created: 11/01/2019 07:03
Updated: 08/06/2024 03:24
Changes: 11/01/2019 07:03 (35), 11/01/2019 07:08 (17), 02/01/2024 08:51 (5), 02/01/2024 08:53 (2), 08/06/2024 03:24 (19)
Complete: 🔍
Cache ID: 216::103