CVE-2020-5238
GitHub Flavored Markdown Table Parsing Denial of Service Vulnerability
Description
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.
INFO
Published Date :
July 1, 2020, 11:15 p.m.
Last Modified :
Nov. 21, 2024, 5:33 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
3.6
Exploitability Score :
2.8
Affected Products
The following products are affected by CVE-2020-5238
vulnerability.
Even if cvefeed.io
is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2020-5238
.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2020-5238
vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2020-5238
vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://github.com/github/cmark-gfm/commit/85d895289c5ab67f988ca659493a64abb5fec7b4 Added Reference https://github.com/github/cmark-gfm/security/advisories/GHSA-7gc6-9qr5-hc85 Added Reference https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TCDHBTUFIOYRIS5HAS6PZNBNMB7IOAX3/ Added Reference https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WMQFOQQCWOAMQ4I2XIVCVOXXIJ75HDCW/ Added Reference https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZGJH2A4VAV54X6NSCNNGSEIGIIY5N2VR/ -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Nov. 07, 2023
Action Type Old Value New Value Added Reference GitHub, Inc. https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TCDHBTUFIOYRIS5HAS6PZNBNMB7IOAX3/ [No types assigned] Added Reference GitHub, Inc. https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZGJH2A4VAV54X6NSCNNGSEIGIIY5N2VR/ [No types assigned] Added Reference GitHub, Inc. https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WMQFOQQCWOAMQ4I2XIVCVOXXIJ75HDCW/ [No types assigned] Removed Reference GitHub, Inc. https://lists.fedoraproject.org/archives/list/[email protected]/message/TCDHBTUFIOYRIS5HAS6PZNBNMB7IOAX3/ Removed Reference GitHub, Inc. https://lists.fedoraproject.org/archives/list/[email protected]/message/ZGJH2A4VAV54X6NSCNNGSEIGIIY5N2VR/ Removed Reference GitHub, Inc. https://lists.fedoraproject.org/archives/list/[email protected]/message/WMQFOQQCWOAMQ4I2XIVCVOXXIJ75HDCW/ -
Modified Analysis by [email protected]
Jan. 28, 2023
Action Type Old Value New Value Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/TCDHBTUFIOYRIS5HAS6PZNBNMB7IOAX3/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/TCDHBTUFIOYRIS5HAS6PZNBNMB7IOAX3/ Mailing List, Third Party Advisory Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/WMQFOQQCWOAMQ4I2XIVCVOXXIJ75HDCW/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/WMQFOQQCWOAMQ4I2XIVCVOXXIJ75HDCW/ Mailing List, Third Party Advisory Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/ZGJH2A4VAV54X6NSCNNGSEIGIIY5N2VR/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/ZGJH2A4VAV54X6NSCNNGSEIGIIY5N2VR/ Mailing List, Third Party Advisory Added CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:* *cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* *cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Oct. 06, 2020
Action Type Old Value New Value Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/ZGJH2A4VAV54X6NSCNNGSEIGIIY5N2VR/ [No Types Assigned] Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/WMQFOQQCWOAMQ4I2XIVCVOXXIJ75HDCW/ [No Types Assigned] -
CVE Modified by [email protected]
Sep. 30, 2020
Action Type Old Value New Value Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/TCDHBTUFIOYRIS5HAS6PZNBNMB7IOAX3/ [No Types Assigned] -
Initial Analysis by [email protected]
Jul. 14, 2020
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:S/C:N/I:N/A:P) Added CVSS V3.1 NIST AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Changed Reference Type https://github.com/github/cmark-gfm/commit/85d895289c5ab67f988ca659493a64abb5fec7b4 No Types Assigned https://github.com/github/cmark-gfm/commit/85d895289c5ab67f988ca659493a64abb5fec7b4 Patch, Third Party Advisory Changed Reference Type https://github.com/github/cmark-gfm/security/advisories/GHSA-7gc6-9qr5-hc85 No Types Assigned https://github.com/github/cmark-gfm/security/advisories/GHSA-7gc6-9qr5-hc85 Third Party Advisory Added CWE NIST CWE-20 Added CPE Configuration OR *cpe:2.3:a:github_flavored_markdown_project:github_flavored_markdown:*:*:*:*:*:*:*:* versions up to (excluding) 0.29.0.gfm.1 -
CVE Modified by [email protected]
Jul. 02, 2020
Action Type Old Value New Value Changed Description 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 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.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2020-5238
is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2020-5238
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
1.18 }} 0.25%
score
0.84782
percentile