Path traversal in ruby (Alpine package)



Published: 2021-04-13
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-28966
CWE-ID CWE-22
Exploitation vector Network
Public exploit N/A
Vulnerable software
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ruby (Alpine package)
Operating systems & Components / Operating system package or component

Vendor Alpine Linux Development Team

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Path traversal

EUVDB-ID: #VU52001

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-28966

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 in tmpdir library. A remote attacker can send a specially crafted HTTP request and read arbitrary files on the system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

ruby (Alpine package): 2.7.1-r0 - 2.7.2-r4

External links

http://git.alpinelinux.org/aports/commit/?id=4d5ee7083e2fe154a66b5a74c85dc08e54c516e5


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.



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