CVE-2021-33391

2023-02-1700:00:00

ubuntu.com

htacg html tidy

arbitrary code execution

cleannode()

security vulnerability

9.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

0.003 Low

EPSS

Percentile

65.5%

JSON

An issue in HTACG HTML Tidy v5.7.28 allows attacker to execute arbitrary
code via the -g option of the CleanNode() function in gdoc.c.

Bugs

Notes

Author	Note
mdeslaur	the commit below is just one of a long list of commits that are required to remove recursion from tidy-html5.

OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchtidy-html5< anyUNKNOWN
ubuntu20.04noarchtidy-html5< 2:5.6.0-11ubuntu0.20.04.1UNKNOWN
ubuntu22.04noarchtidy-html5< 2:5.6.0-11ubuntu0.22.04.1UNKNOWN
ubuntu23.04noarchtidy-html5< 2:5.6.0-11ubuntu0.23.04.1UNKNOWN
ubuntu23.10noarchtidy-html5< 2:5.6.0-11ubuntu0.23.10.1UNKNOWN
ubuntu24.04noarchtidy-html5< 2:5.6.0-11ubuntu1UNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	18.04	noarch	tidy-html5	< any	UNKNOWN
ubuntu	20.04	noarch	tidy-html5	< 2:5.6.0-11ubuntu0.20.04.1	UNKNOWN
ubuntu	22.04	noarch	tidy-html5	< 2:5.6.0-11ubuntu0.22.04.1	UNKNOWN
ubuntu	23.04	noarch	tidy-html5	< 2:5.6.0-11ubuntu0.23.04.1	UNKNOWN
ubuntu	23.10	noarch	tidy-html5	< 2:5.6.0-11ubuntu0.23.10.1	UNKNOWN
ubuntu	24.04	noarch	tidy-html5	< 2:5.6.0-11ubuntu1	UNKNOWN