phpCMS 9 api.php?op=checkcode font_size/height/width resource management

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.
6.4$0-$5k0.00

Summaryinfo

A vulnerability described as problematic has been identified in phpCMS 9. The impacted element is an unknown function of the file api.php?op=checkcode. Such manipulation of the argument font_size/height/width as part of Parameter leads to resource management. This vulnerability is traded as CVE-2018-14940. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in phpCMS 9. It has been rated as problematic. Affected by this issue is an unknown code block of the file api.php?op=checkcode. The manipulation of the argument font_size/height/width as part of a Parameter leads to a resource management vulnerability. Using CWE to declare the problem leads to CWE-399. Impacted is availability. CVE summarizes:

PHPCMS 9 allows remote attackers to cause a denial of service (resource consumption) via large font_size, height, and width parameters in an api.php?op=checkcode request.

The bug was discovered 07/22/2018. The weakness was shared 08/05/2018 (Website). The advisory is shared for download at github.com. This vulnerability is handled as CVE-2018-14940 since 08/05/2018. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are known technical details, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 14 days. During that time the estimated underground price was around $0-$5k.

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

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.4

VulDB Base Score: 5.3
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Resource management
CWE: CWE-399 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

07/22/2018 🔍
08/05/2018 +13 days 🔍
08/05/2018 +0 days 🔍
08/05/2018 +0 days 🔍
08/06/2018 +1 days 🔍
03/13/2020 +585 days 🔍

Sourcesinfo

Advisory: github.com
Status: Not defined

CVE: CVE-2018-14940 (🔍)
GCVE (CVE): GCVE-0-2018-14940
GCVE (VulDB): GCVE-100-122624

Entryinfo

Created: 08/06/2018 06:57
Updated: 03/13/2020 14:26
Changes: 08/06/2018 06:57 (57), 03/13/2020 14:26 (1)
Complete: 🔍
Cache ID: 216::103

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