JsonCpp 1.8.4 json_reader.cpp readValue JSON Request denial of service

HistoryDiffrelatejsonxmlCTI

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.
3.3	$0-$5k	0.00

Summaryinfo

A vulnerability categorized as problematic has been discovered in JsonCpp 1.8.4. The affected element is the function Json::OurReader::readValue of the file json_reader.cpp. Executing a manipulation as part of JSON Request can lead to denial of service. This vulnerability is handled as CVE-2018-17851. There is not any exploit available.

Detailsinfo

A vulnerability has been found in JsonCpp 1.8.4 and classified as problematic. This vulnerability affects the function Json::OurReader::readValue of the file json_reader.cpp. The manipulation as part of a JSON Request leads to a denial of service vulnerability. The CWE definition for the vulnerability is CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. As an impact it is known to affect availability. CVE summarizes:

An issue was discovered in JsonCpp 1.8.4. An unhandled exception vulnerability exists in Json::OurReader::readValue() in json_reader.cpp after throwing an instance of "Json::RuntimeError what(): Exceeded stackLimit." Specially crafted JSON requests can cause an unhandled exception resulting in denial of service. An attacker can send malicious JSON to trigger this vulnerability.

The bug was discovered 09/26/2018. The weakness was released 10/01/2018 (Website). The advisory is shared for download at github.com. This vulnerability was named CVE-2018-17851 since 10/01/2018. There are known technical details, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 5 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.

Entry connected to this vulnerability is available at VDB-124635. Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

JsonCpp

Version

1.8.4

CPE 2.3info

🔍

CPE 2.2info

🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.3
VulDB Meta Temp Score: 3.3

VulDB Base Score: 3.3
VulDB Temp Score: 3.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

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: 🔍

Exploitinginfo

Class: Denial of service
CWE: CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined
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

09/26/2018 🔍
10/01/2018 +4 days 🔍
10/01/2018 +0 days 🔍
10/01/2018 +0 days 🔍
05/19/2023 +1691 days 🔍

Sourcesinfo

Advisory: 823
Status: Not defined

CVE: CVE-2018-17851 (🔍)
GCVE (CVE): GCVE-0-2018-17851
GCVE (VulDB): GCVE-100-124636
See also: 🔍

Entryinfo

Created: 10/01/2018 14:29
Updated: 05/19/2023 15:59
Changes: 10/01/2018 14:29 (41), 03/28/2020 13:31 (2), 05/19/2023 15:59 (2)
Complete: 🔍
Cache ID: 216::103