VDB-161767 · CVE-2020-25821 · GCVE-0-2020-25821

peg-markdown 0.4.14 markdown_lib.c process_raw_blocks null pointer dereference

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-$5k	0.00

Summaryinfo

A vulnerability marked as problematic has been reported in peg-markdown 0.4.14. Affected by this issue is the function process_raw_blocks in the library markdown_lib.c. This manipulation causes null pointer dereference. This vulnerability is tracked as CVE-2020-25821. The attack is possible to be carried out remotely. No exploit exists. It is recommended to replace the affected component with an alternative. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Detailsinfo

A vulnerability classified as problematic was found in peg-markdown 0.4.14. Affected by this vulnerability is the function process_raw_blocks in the library markdown_lib.c. The manipulation with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. As an impact it is known to affect availability. The summary by CVE is:

** UNSUPPORTED WHEN ASSIGNED ** peg-markdown 0.4.14 has a NULL pointer dereference in process_raw_blocks in markdown_lib.c. NOTE: This vulnerability only affects products that are no longer supported by the maintainer.

The weakness was disclosed 09/23/2020. This vulnerability is known as CVE-2020-25821 since 09/23/2020. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit.

The problem might be mitigated by replacing the product with as an alternative.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Name

peg-markdown

Version

0.4.14

Support

end of life

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

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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
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: Alternative
Status: 🔍

0-Day Time: 🔍

Timelineinfo

09/23/2020 🔍
09/23/2020 +0 days 🔍
09/23/2020 +0 days 🔍
08/04/2024 +1411 days 🔍

Sourcesinfo

Status: Not defined

CVE: CVE-2020-25821 (🔍)
GCVE (CVE): GCVE-0-2020-25821
GCVE (VulDB): GCVE-100-161767

Entryinfo

Created: 09/23/2020 12:34 PM
Updated: 08/04/2024 07:11 PM
Changes: 09/23/2020 12:34 PM (36), 09/23/2020 12:39 PM (17), 08/04/2024 07:11 PM (17)
Complete: 🔍
Cache ID: 244:F0D:40