SB2018080627 - Path traversal in Debian Linux

Description

This security bulletin contains information about 1 vulnerability.

1) Path traversal (CVE-ID: CVE-2017-16654)

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

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.

An issue was discovered in Symfony before 2.7.38, 2.8.31, 3.2.14, 3.3.13, 3.4-BETA5, and 4.0-BETA5. The Intl component includes various bundle readers that are used to read resource bundles from the local filesystem. The read() methods of these classes use a path and a locale to determine the language bundle to retrieve. The locale argument value is commonly retrieved from untrusted user input (like a URL parameter). An attacker can use this argument to navigate to arbitrary directories via the dot-dot-slash attack, aka Directory Traversal.

Remediation

Install update from vendor's website.

References

• https://github.com/symfony/symfony/pull/24994
• https://lists.debian.org/debian-lts-announce/2019/03/msg00009.html
• https://symfony.com/blog/cve-2017-16654-intl-bundle-readers-breaking-out-of-paths
• https://www.debian.org/security/2018/dsa-4262