Path traversal in perl (Alpine package)

1) Path traversal

EUVDB-ID: #VU13236

Risk: Low

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-12015

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 bypass security restrictions on the target system.

The vulnerability exists due to an error when processing malicious input. A remote attacker can trick the victim into extracting a specially crafted tar archive containing a file and a symbolic link (symlink) with the same name, create a file outside of the current working directory, bypass a directory-traversal protection mechanism and create or overwrite files with the privileges of the target user.

Mitigation

Install update from vendor's website.

Vulnerable software versions

perl (Alpine package): 5.24.4-r0

CPE2.3

• cpe:2.3:o:alpine:perl_alpine_package:5.24.4-r0:*:*:*:*:alpine_linux:*:3.4

External links

https://git.alpinelinux.org/aports/commit/?id=13074bff64787b9251ec396b8ac6ecd18718d2a0
https://git.alpinelinux.org/aports/commit/?id=86b5b86c354507c36746160cfbae4b64783bfafb
https://git.alpinelinux.org/aports/commit/?id=599da1ef36c21d244ab85a210d2a31fe48c7a329
https://git.alpinelinux.org/aports/commit/?id=9e48350095c409ad45bca9e309dac31decf5216b
https://git.alpinelinux.org/aports/commit/?id=ebf7fcd2b328ba5b15db2785fa1d46599fbc330f

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.