Ubuntu update for htmldoc

Published: 2021-12-16

Risk	Medium
Patch available	YES
Number of vulnerabilities	1
CVE-ID	CVE-2021-23180
CWE-ID	CWE-20
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	Ubuntu Operating systems & Components / Operating system htmldoc-common (Ubuntu package) Operating systems & Components / Operating system package or component htmldoc (Ubuntu package) Operating systems & Components / Operating system package or component
Vendor	Canonical Ltd.

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Input validation error

EUVDB-ID: #VU54036

Risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-23180

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input within the file_extension() function in file.c. A remote attacker can pass specially crafted URI to the application and perform a denial of service (DoS) attack.

Mitigation

Update the affected package htmldoc to the latest version.

Vulnerable software versions

Ubuntu: 20.04 - 21.04

htmldoc-common (Ubuntu package): before 1.9.11-2ubuntu0.1

htmldoc (Ubuntu package): before 1.9.11-2ubuntu0.1

External links

http://ubuntu.com/security/notices/USN-5198-1

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.