GitHub Flavored Markdown up to 0.29.0.gfm.0 Table Extension input validation

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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4.7$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic has been found in GitHub Flavored Markdown up to 0.29.0.gfm.0. Impacted is an unknown function of the component Table Extension. Performing a manipulation results in input validation. This vulnerability is cataloged as CVE-2020-5238. It is possible to initiate the attack remotely. There is no exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in GitHub Flavored Markdown up to 0.29.0.gfm.0 (Bug Tracking Software). It has been classified as problematic. This affects some unknown processing of the component Table Extension. The manipulation with an unknown input leads to a input validation vulnerability. CWE is classifying the issue as CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. This is going to have an impact on availability. The summary by CVE is:

The table extension in GitHub Flavored Markdown before version 0.29.0.gfm.1 takes O(n * n) time to parse certain inputs. An attacker could craft a markdown table which would take an unreasonably long time to process, causing a denial of service. This issue does not affect the upstream cmark project. The issue has been fixed in version 0.29.0.gfm.1.

The weakness was shared 07/01/2020 (GitHub Repository). The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2020-5238 since 01/02/2020. It is possible to initiate the attack remotely. Required for exploitation is a authentication. Neither technical details nor an exploit are publicly available.

Upgrading to version 0.29.0.gfm.1 eliminates this vulnerability.

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Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.1

VulDB Base Score: 4.3
VulDB Temp Score: 3.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.5
NVD Vector: 🔍

CVSSv2info

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

Exploitinginfo

Class: Input validation
CWE: CWE-20
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: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: GitHub Flavored Markdown 0.29.0.gfm.1

Timelineinfo

01/02/2020 🔍
07/01/2020 +181 days 🔍
07/02/2020 +1 days 🔍
10/28/2020 +118 days 🔍

Sourcesinfo

Advisory: github.com
Status: Not defined
Confirmation: 🔍

CVE: CVE-2020-5238 (🔍)
GCVE (CVE): GCVE-0-2020-5238
GCVE (VulDB): GCVE-100-157569

Entryinfo

Created: 07/02/2020 15:50
Updated: 10/28/2020 13:33
Changes: 07/02/2020 15:50 (38), 07/02/2020 15:55 (12), 10/28/2020 13:27 (1), 10/28/2020 13:33 (1)
Complete: 🔍
Cache ID: 216::103

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