Path traversal in Hedgedoc

Published: 2021-05-04

Risk	Medium
Patch available	YES
Number of vulnerabilities	1
CVE ID	CVE-2021-29474
CWE ID	CWE-22
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	HedgeDoc Client/Desktop applications / Other client software
Vendor	HedgeDoc

Security Advisory

This security advisory describes one medium risk vulnerability.

1) Path traversal

Risk: Medium

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

CVE-ID: CVE-2021-29474

CWE-ID: CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform directory traversal attacks.

The vulnerability exists due to input validation error when processing directory traversal sequences. A remote attacker can send a specially crafted HTTP request and read arbitrary .md files on the system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

HedgeDoc: 0.3.3, 0.3.4, 0.4.0, 0.4.1, 0.4.2, 0.4.3, 0.4.4, 0.4.5, 0.4.6, 0.5.0, 0.5.1, 1.2.0, 1.2.1, 1.3.0, 1.3.1, 1.3.2, 1.4.0, 1.5.0, 1.6.0, 1.7.0, 1.7.1, 1.7.2

CPE

External links

https://github.com/hedgedoc/hedgedoc/security/advisories/GHSA-p528-555r-pf87

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.