CVE-2023-28631 – comrak

Package

Manager: cargo
Name: comrak
Vulnerable Version: >=0 <0.17.0

Severity

Level: Medium

CVSS v3.1: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

EPSS: 0.00248 pctl0.47943

Details

Comrak AST node data is not validated (GHSL-2023-049) ### Impact A Comrak AST can be constructed manually by a program instead of parsing a Markdown document with `parse_document`. This AST can then be converted to HTML via `html::format_document_with_plugins`. However, the HTML formatting code assumes that the AST is well-formed. For example, many AST notes contain `[u8]` fields which the formatting code assumes is valid UTF-8 data. Several bugs can be triggered if this is not the case. ### Patches 0.17.0 contains adjustments to the AST, storing strings instead of unvalidated byte arrays. ### Workarounds * Validate UTF-8 correctness of all data when assigning to `&[u8]` and `Vec<u8>` fields in the AST. ### References n/a

Metadata

Created: 2023-03-28T14:45:28Z
Modified: 2023-03-28T23:08:47Z
Source: https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2023/03/GHSA-5r3x-p7xx-x6q5/GHSA-5r3x-p7xx-x6q5.json
CWE IDs: ["CWE-755"]
Alternative ID: GHSA-5r3x-p7xx-x6q5
Finding: F096
Auto approve: 1