Vulnerability Details : CVE-2017-16654
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.
Vulnerability category: Directory traversal
Products affected by CVE-2017-16654
- cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
- cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*
- cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*
- cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*
- cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2017-16654
0.14%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 51 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2017-16654
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
---|---|---|---|---|---|---|
5.0
|
MEDIUM | AV:N/AC:L/Au:N/C:P/I:N/A:N |
10.0
|
2.9
|
NIST | |
7.5
|
HIGH | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
3.9
|
3.6
|
NIST |
CWE ids for CVE-2017-16654
-
The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.Assigned by: nvd@nist.gov (Primary)
References for CVE-2017-16654
-
https://github.com/symfony/symfony/pull/24994
Prevent bundle readers from breaking out of paths by fabpot · Pull Request #24994 · symfony/symfony · GitHubIssue Tracking;Third Party Advisory
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https://www.debian.org/security/2018/dsa-4262
Debian -- Security Information -- DSA-4262-1 symfonyThird Party Advisory
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https://lists.debian.org/debian-lts-announce/2019/03/msg00009.html
[SECURITY] [DLA 1707-1] symfony security updateThird Party Advisory
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https://symfony.com/blog/cve-2017-16654-intl-bundle-readers-breaking-out-of-paths
CVE-2017-16654: Intl bundle readers breaking out of paths (Symfony Blog)Issue Tracking;Vendor Advisory
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