Directory Traversal Affecting symfony package, versions <3.4.0+dfsg-1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published22 Jul 2018
- disclosed6 Aug 2018
Introduced: 22 Jul 2018
CVE-2017-16654 (opens in a new tab)How to fix?
Upgrade Debian:unstable symfony to version 3.4.0+dfsg-1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream symfony package and not the symfony package as distributed by Debian.
See How to fix? for Debian:unstable relevant fixed versions and status.
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.
References
- https://security-tracker.debian.org/tracker/CVE-2017-16654
- https://symfony.com/blog/cve-2017-16654-intl-bundle-readers-breaking-out-of-paths
- https://www.debian.org/security/2018/dsa-4262
- https://lists.debian.org/debian-lts-announce/2019/03/msg00009.html
- https://github.com/symfony/symfony/pull/24994
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2017-16654