CVE-2023-42821

The package `github.com/gomarkdown/markdown` is a Go library for parsing Markdown text and rendering as HTML. Prior to pseudoversion `0.0.0-20230922105210-14b16010c2ee`, which corresponds with commit `14b16010c2ee7ff33a940a541d993bd043a88940`, parsing malformed markdown input with parser that uses parser.Mmark extension could result in out-of-bounds read vulnerability. To exploit the vulnerability, parser needs to have `parser.Mmark` extension set. The panic occurs inside the `citation.go` file on the line 69 when the parser tries to access the element past its length. This can result in a denial of service. Commit `14b16010c2ee7ff33a940a541d993bd043a88940`/pseudoversion `0.0.0-20230922105210-14b16010c2ee` contains a patch for this issue.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/gomarkdown/markdown/blob/7478c230c7cd3e7328803d89abe591d0b61c41e4/parser/citation.go#L69	Product
https://github.com/gomarkdown/markdown/commit/14b16010c2ee7ff33a940a541d993bd043a88940	Patch
https://github.com/gomarkdown/markdown/security/advisories/GHSA-m9xq-6h2j-65r2	Exploit Vendor Advisory
https://github.com/gomarkdown/markdown/blob/7478c230c7cd3e7328803d89abe591d0b61c41e4/parser/citation.go#L69	Product
https://github.com/gomarkdown/markdown/commit/14b16010c2ee7ff33a940a541d993bd043a88940	Patch
https://github.com/gomarkdown/markdown/security/advisories/GHSA-m9xq-6h2j-65r2	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:gomarkdown:markdown:-:*:*:*:*:go:*:*

History

21 Nov 2024, 08:23

Type	Values Removed	Values Added
New CVE

Information

Published : 2023-09-22 17:15

Updated : 2024-11-21 08:23

NVD link : CVE-2023-42821

Mitre link : CVE-2023-42821

CVE.ORG link : CVE-2023-42821

JSON object : View

Products Affected

gomarkdown

markdown

CWE

CWE-125

Out-of-bounds Read

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