#VU37008 Path traversal in Debian Linux and CloudForms - CVE-2018-1000544

Vulnerability identifier: #VU37008

Vulnerability risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2018-1000544

CWE-ID: CWE-22

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Debian Linux
Operating systems & Components / Operating system
CloudForms
Client/Desktop applications / Multimedia software

Vendor: Debian
Red Hat Inc.

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 in Zip::File component that can result in write arbitrary files to the filesystem. This attack appear to be exploitable via If a site. A remote authenticated attacker can send a specially crafted HTTP request and uploading of .zip files , an attacker can upload a malicious file that contains symlinks or files with absolute pathnames "./" to write arbitrary files to the filesystem.

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

Debian Linux: 8.0

CloudForms: 4.6 - 8.0

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External links
https://access.redhat.com/errata/RHSA-2018:3466
https://github.com/rubyzip/rubyzip/issues/369
https://lists.debian.org/debian-lts-announce/2018/08/msg00013.html
https://lists.debian.org/debian-lts-announce/2020/08/msg00002.html

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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.